refactor: migrate ES private fields to TypeScript private for Vue Proxy compatibility (#8440)

## Summary

Migrates ECMAScript private fields (`#`) to TypeScript private
(`private`) across LiteGraph to fix Vue Proxy reactivity
incompatibility.

## Problem

ES private fields (`#field`) are incompatible with Vue's Proxy-based
reactivity system - accessing `#field` through a Proxy throws
`TypeError: Cannot read private member from an object whose class did
not declare it`.

## Solution

- Converted all `#field` to `private _field` across 10 phases
- Added `toJSON()` methods to `LGraph`, `NodeSlot`, `NodeInputSlot`, and
`NodeOutputSlot` to prevent circular reference errors during
serialization (TypeScript private fields are visible to `JSON.stringify`
unlike true ES private fields)
- Made `DragAndScale.element.data` non-enumerable to break canvas
circular reference chain

## Testing

- All 4027 unit tests pass
- Added 9 new serialization tests to catch future circular reference
issues
- Browser tests (undo/redo, save workflows) verified working

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8440-refactor-migrate-ES-private-fields-to-TypeScript-private-for-Vue-Proxy-compatibility-2f76d73d365081a3bd82d429a3e0fcb7)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Amp <amp@ampcode.com>

src/extensions/core/groupNode.ts

@@ -292,10 +292,10 @@ export class GroupNodeConfig {
       this.processNode(node, seenInputs, seenOutputs)
     }
 
-    for (const p of this.#convertedToProcess) {
+    for (const p of this._convertedToProcess) {
       p()
     }
-    this.#convertedToProcess = []
+    this._convertedToProcess = []
     if (!this.nodeDef) return
     await app.registerNodeDef(`${PREFIX}${SEPARATOR}` + this.name, this.nodeDef)
     useNodeDefStore().addNodeDef(this.nodeDef)
@@ -773,7 +773,7 @@ export class GroupNodeConfig {
     }
   }
 
-  #convertedToProcess: (() => void)[] = []
+  private _convertedToProcess: (() => void)[] = []
   processNodeInputs(
     node: GroupNodeData,
     seenInputs: Record<string, number>,
@@ -804,7 +804,7 @@ export class GroupNodeConfig {
     )
 
     // Converted inputs have to be processed after all other nodes as they'll be at the end of the list
-    this.#convertedToProcess.push(() =>
+    this._convertedToProcess.push(() =>
       this.processConvertedWidgets(
         inputs,
         node,

src/extensions/core/widgetInputs.ts

@@ -103,7 +103,7 @@ export class PrimitiveNode extends LGraphNode {
 
   override onAfterGraphConfigured() {
     if (this.outputs[0].links?.length && !this.widgets?.length) {
-      this.#onFirstConnection()
+      this._onFirstConnection()
 
       // Populate widget values from config data
       if (this.widgets && this.widgets_values) {
@@ -116,7 +116,7 @@ export class PrimitiveNode extends LGraphNode {
       }
 
       // Merge values if required
-      this.#mergeWidgetConfig()
+      this._mergeWidgetConfig()
     }
   }
 
@@ -133,11 +133,11 @@ export class PrimitiveNode extends LGraphNode {
     const links = this.outputs[0].links
     if (connected) {
       if (links?.length && !this.widgets?.length) {
-        this.#onFirstConnection()
+        this._onFirstConnection()
       }
     } else {
       // We may have removed a link that caused the constraints to change
-      this.#mergeWidgetConfig()
+      this._mergeWidgetConfig()
 
       if (!links?.length) {
         this.onLastDisconnect()
@@ -159,7 +159,7 @@ export class PrimitiveNode extends LGraphNode {
     }
 
     if (this.outputs[slot].links?.length) {
-      const valid = this.#isValidConnection(input)
+      const valid = this._isValidConnection(input)
       if (valid) {
         // On connect of additional outputs, copy our value to their widget
         this.applyToGraph([{ target_id: target_node.id, target_slot } as LLink])
@@ -170,7 +170,7 @@ export class PrimitiveNode extends LGraphNode {
     return true
   }
 
-  #onFirstConnection(recreating?: boolean) {
+  private _onFirstConnection(recreating?: boolean) {
     // First connection can fire before the graph is ready on initial load so random things can be missing
     if (!this.outputs[0].links || !this.graph) {
       this.onLastDisconnect()
@@ -204,7 +204,7 @@ export class PrimitiveNode extends LGraphNode {
     this.outputs[0].name = type
     this.outputs[0].widget = widget
 
-    this.#createWidget(
+    this._createWidget(
       widget[CONFIG] ?? config,
       theirNode,
       widget.name,
@@ -213,7 +213,7 @@ export class PrimitiveNode extends LGraphNode {
     )
   }
 
-  #createWidget(
+  private _createWidget(
     inputData: InputSpec,
     node: LGraphNode,
     widgetName: string,
@@ -307,8 +307,8 @@ export class PrimitiveNode extends LGraphNode {
 
   recreateWidget() {
     const values = this.widgets?.map((w) => w.value)
-    this.#removeWidgets()
-    this.#onFirstConnection(true)
+    this._removeWidgets()
+    this._onFirstConnection(true)
     if (values?.length && this.widgets) {
       for (let i = 0; i < this.widgets.length; i++)
         this.widgets[i].value = values[i]
@@ -316,7 +316,7 @@ export class PrimitiveNode extends LGraphNode {
     return this.widgets?.[0]
   }
 
-  #mergeWidgetConfig() {
+  private _mergeWidgetConfig() {
     // Merge widget configs if the node has multiple outputs
     const output = this.outputs[0]
     const links = output.links ?? []
@@ -348,11 +348,11 @@ export class PrimitiveNode extends LGraphNode {
       const theirInput = theirNode.inputs[link.target_slot]
 
       // Call is valid connection so it can merge the configs when validating
-      this.#isValidConnection(theirInput, hasConfig)
+      this._isValidConnection(theirInput, hasConfig)
     }
   }
 
-  #isValidConnection(input: INodeInputSlot, forceUpdate?: boolean) {
+  private _isValidConnection(input: INodeInputSlot, forceUpdate?: boolean) {
     // Only allow connections where the configs match
     const output = this.outputs?.[0]
     const config2 = (input.widget?.[GET_CONFIG] as () => InputSpec)?.()
@@ -367,7 +367,7 @@ export class PrimitiveNode extends LGraphNode {
     )
   }
 
-  #removeWidgets() {
+  private _removeWidgets() {
     if (this.widgets) {
       // Allow widgets to cleanup
       for (const w of this.widgets) {
@@ -398,7 +398,7 @@ export class PrimitiveNode extends LGraphNode {
     this.outputs[0].name = 'connect to widget input'
     delete this.outputs[0].widget
 
-    this.#removeWidgets()
+    this._removeWidgets()
   }
 }
 

src/lib/litegraph/src/CanvasPointer.ts

@@ -31,17 +31,17 @@ export class CanvasPointer {
 
   /** Maximum offset from click location */
   static get maxClickDrift() {
-    return this.#maxClickDrift
+    return this._maxClickDrift
   }
 
   static set maxClickDrift(value) {
-    this.#maxClickDrift = value
-    this.#maxClickDrift2 = value * value
+    this._maxClickDrift = value
+    this._maxClickDrift2 = value * value
   }
 
-  static #maxClickDrift = 6
+  private static _maxClickDrift = 6
   /** {@link maxClickDrift} squared.  Used to calculate click drift without `sqrt`. */
-  static #maxClickDrift2 = this.#maxClickDrift ** 2
+  private static _maxClickDrift2 = this._maxClickDrift ** 2
 
   /** Assume that "wheel" events with both deltaX and deltaY less than this value are trackpad gestures. */
   static trackpadThreshold = 60
@@ -153,18 +153,18 @@ export class CanvasPointer {
    * Therefore, simply setting this value twice will execute the first callback.
    */
   get finally() {
-    return this.#finally
+    return this._finally
   }
 
   set finally(value) {
     try {
-      this.#finally?.()
+      this._finally?.()
     } finally {
-      this.#finally = value
+      this._finally = value
     }
   }
 
-  #finally?: () => unknown
+  private _finally?: () => unknown
 
   constructor(element: Element) {
     this.element = element
@@ -197,7 +197,7 @@ export class CanvasPointer {
 
     // Primary button released - treat as pointerup.
     if (!(e.buttons & eDown.buttons)) {
-      this.#completeClick(e)
+      this._completeClick(e)
       this.reset()
       return
     }
@@ -209,8 +209,8 @@ export class CanvasPointer {
 
     const longerThanBufferTime =
       e.timeStamp - eDown.timeStamp > CanvasPointer.bufferTime
-    if (longerThanBufferTime || !this.#hasSamePosition(e, eDown)) {
-      this.#setDragStarted(e)
+    if (longerThanBufferTime || !this._hasSamePosition(e, eDown)) {
+      this._setDragStarted(e)
     }
   }
 
@@ -221,13 +221,13 @@ export class CanvasPointer {
   up(e: CanvasPointerEvent): boolean {
     if (e.button !== this.eDown?.button) return false
 
-    this.#completeClick(e)
+    this._completeClick(e)
     const { dragStarted } = this
     this.reset()
     return !dragStarted
   }
 
-  #completeClick(e: CanvasPointerEvent): void {
+  private _completeClick(e: CanvasPointerEvent): void {
     const { eDown } = this
     if (!eDown) return
 
@@ -236,11 +236,11 @@ export class CanvasPointer {
     if (this.dragStarted) {
       // A move event already started drag
       this.onDragEnd?.(e)
-    } else if (!this.#hasSamePosition(e, eDown)) {
+    } else if (!this._hasSamePosition(e, eDown)) {
       // Teleport without a move event (e.g. tab out, move, tab back)
-      this.#setDragStarted()
+      this._setDragStarted()
       this.onDragEnd?.(e)
-    } else if (this.onDoubleClick && this.#isDoubleClick()) {
+    } else if (this.onDoubleClick && this._isDoubleClick()) {
       // Double-click event
       this.onDoubleClick(e)
       this.eLastDown = undefined
@@ -258,10 +258,10 @@ export class CanvasPointer {
    * @param tolerance2 The maximum distance (squared) before the positions are considered different
    * @returns `true` if the two events were no more than {@link maxClickDrift} apart, otherwise `false`
    */
-  #hasSamePosition(
+  private _hasSamePosition(
     a: PointerEvent,
     b: PointerEvent,
-    tolerance2 = CanvasPointer.#maxClickDrift2
+    tolerance2 = CanvasPointer._maxClickDrift2
   ): boolean {
     const drift = dist2(a.clientX, a.clientY, b.clientX, b.clientY)
     return drift <= tolerance2
@@ -271,21 +271,21 @@ export class CanvasPointer {
    * Checks whether the pointer is currently past the max click drift threshold.
    * @returns `true` if the latest pointer event is past the the click drift threshold
    */
-  #isDoubleClick(): boolean {
+  private _isDoubleClick(): boolean {
     const { eDown, eLastDown } = this
     if (!eDown || !eLastDown) return false
 
     // Use thrice the drift distance for double-click gap
-    const tolerance2 = (3 * CanvasPointer.#maxClickDrift) ** 2
+    const tolerance2 = (3 * CanvasPointer._maxClickDrift) ** 2
     const diff = eDown.timeStamp - eLastDown.timeStamp
     return (
       diff > 0 &&
       diff < CanvasPointer.doubleClickTime &&
-      this.#hasSamePosition(eDown, eLastDown, tolerance2)
+      this._hasSamePosition(eDown, eLastDown, tolerance2)
     )
   }
 
-  #setDragStarted(eMove?: CanvasPointerEvent): void {
+  private _setDragStarted(eMove?: CanvasPointerEvent): void {
     this.dragStarted = true
     this.onDragStart?.(this, eMove)
     delete this.onDragStart
@@ -303,14 +303,14 @@ export class CanvasPointer {
     const timeSinceLastEvent = Math.max(0, now - this.lastWheelEventTime)
     this.lastWheelEventTime = now
 
-    if (this.#isHighResWheelEvent(e, now)) {
+    if (this._isHighResWheelEvent(e, now)) {
       this.detectedDevice = 'mouse'
-    } else if (this.#isWithinCooldown(timeSinceLastEvent)) {
-      if (this.#shouldBufferLinuxEvent(e)) {
-        this.#bufferLinuxEvent(e, now)
+    } else if (this._isWithinCooldown(timeSinceLastEvent)) {
+      if (this._shouldBufferLinuxEvent(e)) {
+        this._bufferLinuxEvent(e, now)
       }
     } else {
-      this.#updateDeviceMode(e, now)
+      this._updateDeviceMode(e, now)
       this.hasReceivedWheelEvent = true
     }
 
@@ -321,7 +321,7 @@ export class CanvasPointer {
    * Validates buffered high res wheel events and switches to mouse mode if pattern matches.
    * @returns `true` if switched to mouse mode
    */
-  #isHighResWheelEvent(event: WheelEvent, now: number): boolean {
+  private _isHighResWheelEvent(event: WheelEvent, now: number): boolean {
     if (!this.bufferedLinuxEvent || this.bufferedLinuxEventTime <= 0) {
       return false
     }
@@ -329,15 +329,15 @@ export class CanvasPointer {
     const timeSinceBuffer = now - this.bufferedLinuxEventTime
 
     if (timeSinceBuffer > CanvasPointer.maxHighResBufferTime) {
-      this.#clearLinuxBuffer()
+      this._clearLinuxBuffer()
       return false
     }
 
     if (
       event.deltaX === 0 &&
-      this.#isLinuxWheelPattern(this.bufferedLinuxEvent.deltaY, event.deltaY)
+      this._isLinuxWheelPattern(this.bufferedLinuxEvent.deltaY, event.deltaY)
     ) {
-      this.#clearLinuxBuffer()
+      this._clearLinuxBuffer()
       return true
     }
 
@@ -347,7 +347,7 @@ export class CanvasPointer {
   /**
    * Checks if we're within the cooldown period where mode switching is disabled.
    */
-  #isWithinCooldown(timeSinceLastEvent: number): boolean {
+  private _isWithinCooldown(timeSinceLastEvent: number): boolean {
     const isFirstEvent = !this.hasReceivedWheelEvent
     const cooldownExpired = timeSinceLastEvent >= CanvasPointer.trackpadMaxGap
     return !isFirstEvent && !cooldownExpired
@@ -356,23 +356,23 @@ export class CanvasPointer {
   /**
    * Updates the device mode based on event patterns.
    */
-  #updateDeviceMode(event: WheelEvent, now: number): void {
-    if (this.#isTrackpadPattern(event)) {
+  private _updateDeviceMode(event: WheelEvent, now: number): void {
+    if (this._isTrackpadPattern(event)) {
       this.detectedDevice = 'trackpad'
-    } else if (this.#isMousePattern(event)) {
+    } else if (this._isMousePattern(event)) {
       this.detectedDevice = 'mouse'
     } else if (
       this.detectedDevice === 'trackpad' &&
-      this.#shouldBufferLinuxEvent(event)
+      this._shouldBufferLinuxEvent(event)
     ) {
-      this.#bufferLinuxEvent(event, now)
+      this._bufferLinuxEvent(event, now)
     }
   }
 
   /**
    * Clears the buffered Linux wheel event and associated timer.
    */
-  #clearLinuxBuffer(): void {
+  private _clearLinuxBuffer(): void {
     this.bufferedLinuxEvent = undefined
     this.bufferedLinuxEventTime = 0
     if (this.linuxBufferTimeoutId !== undefined) {
@@ -385,7 +385,7 @@ export class CanvasPointer {
    * Checks if the event matches trackpad input patterns.
    * @param event The wheel event to check
    */
-  #isTrackpadPattern(event: WheelEvent): boolean {
+  private _isTrackpadPattern(event: WheelEvent): boolean {
     // Two-finger panning: non-zero deltaX AND deltaY
     if (event.deltaX !== 0 && event.deltaY !== 0) return true
 
@@ -399,7 +399,7 @@ export class CanvasPointer {
    * Checks if the event matches mouse wheel input patterns.
    * @param event The wheel event to check
    */
-  #isMousePattern(event: WheelEvent): boolean {
+  private _isMousePattern(event: WheelEvent): boolean {
     const absoluteDeltaY = Math.abs(event.deltaY)
 
     // Primary threshold for switching from trackpad to mouse
@@ -417,7 +417,7 @@ export class CanvasPointer {
    * Checks if the event should be buffered as a potential Linux wheel event.
    * @param event The wheel event to check
    */
-  #shouldBufferLinuxEvent(event: WheelEvent): boolean {
+  private _shouldBufferLinuxEvent(event: WheelEvent): boolean {
     const absoluteDeltaY = Math.abs(event.deltaY)
     const isInLinuxRange = absoluteDeltaY >= 10 && absoluteDeltaY < 60
     const isVerticalOnly = event.deltaX === 0
@@ -436,7 +436,7 @@ export class CanvasPointer {
    * @param event The event to buffer
    * @param now The current timestamp
    */
-  #bufferLinuxEvent(event: WheelEvent, now: number): void {
+  private _bufferLinuxEvent(event: WheelEvent, now: number): void {
     if (this.linuxBufferTimeoutId !== undefined) {
       clearTimeout(this.linuxBufferTimeoutId)
     }
@@ -446,7 +446,7 @@ export class CanvasPointer {
 
     // Set timeout to clear buffer after 10ms
     this.linuxBufferTimeoutId = setTimeout(() => {
-      this.#clearLinuxBuffer()
+      this._clearLinuxBuffer()
     }, CanvasPointer.maxHighResBufferTime)
   }
 
@@ -455,7 +455,7 @@ export class CanvasPointer {
    * @param deltaY1 The first deltaY value
    * @param deltaY2 The second deltaY value
    */
-  #isLinuxWheelPattern(deltaY1: number, deltaY2: number): boolean {
+  private _isLinuxWheelPattern(deltaY1: number, deltaY2: number): boolean {
     const absolute1 = Math.abs(deltaY1)
     const absolute2 = Math.abs(deltaY2)
 

src/lib/litegraph/src/DragAndScale.ts

@@ -81,7 +81,7 @@ export class DragAndScale {
    * Returns `true` if the current state has changed from the previous state.
    * @returns `true` if the current state has changed from the previous state, otherwise `false`.
    */
-  #stateHasChanged(): boolean {
+  private _stateHasChanged(): boolean {
     const current = this.state
     const previous = this.lastState
 
@@ -95,7 +95,7 @@ export class DragAndScale {
   computeVisibleArea(viewport: Rect | undefined): void {
     const { scale, offset, visible_area } = this
 
-    if (this.#stateHasChanged()) {
+    if (this._stateHasChanged()) {
       this.onChanged?.(scale, offset)
       copyState(this.state, this.lastState)
     }

src/lib/litegraph/src/LGraph.ts

@@ -244,7 +244,7 @@ export class LGraph
   }
 
   /** Internal only.  Not required for serialisation; calculated on deserialise. */
-  #lastFloatingLinkId: number = 0
+  private _lastFloatingLinkId: number = 0
 
   private readonly floatingLinksInternal: Map<LinkId, LLink> = new Map()
   get floatingLinks(): ReadonlyMap<LinkId, LLink> {
@@ -365,7 +365,7 @@ export class LGraph
     this.reroutes.clear()
     this.floatingLinksInternal.clear()
 
-    this.#lastFloatingLinkId = 0
+    this._lastFloatingLinkId = 0
 
     // other scene stuff
     this._groups = []
@@ -1304,7 +1304,7 @@ export class LGraph
 
   addFloatingLink(link: LLink): LLink {
     if (link.id === -1) {
-      link.id = ++this.#lastFloatingLinkId
+      link.id = ++this._lastFloatingLinkId
     }
     this.floatingLinksInternal.set(link.id, link)
 
@@ -2175,8 +2175,16 @@ export class LGraph
     }
   }
 
+  /**
+   * Custom JSON serialization to prevent circular reference errors.
+   * Called automatically by JSON.stringify().
+   */
+  toJSON(): ISerialisedGraph {
+    return this.serialize()
+  }
+
   /** @returns The drag and scale state of the first attached canvas, otherwise `undefined`. */
-  #getDragAndScale(): DragAndScaleState | undefined {
+  private _getDragAndScale(): DragAndScaleState | undefined {
     const ds = this.list_of_graphcanvas?.at(0)?.ds
     if (ds) return { scale: ds.scale, offset: ds.offset }
   }
@@ -2216,7 +2224,7 @@ export class LGraph
 
     // Save scale and offset
     const extra = { ...this.extra }
-    if (LiteGraph.saveViewportWithGraph) extra.ds = this.#getDragAndScale()
+    if (LiteGraph.saveViewportWithGraph) extra.ds = this._getDragAndScale()
     if (!extra.ds) delete extra.ds
 
     const data: ReturnType<typeof this.asSerialisable> = {
@@ -2406,8 +2414,8 @@ export class LGraph
           const floatingLink = LLink.create(linkData)
           this.addFloatingLink(floatingLink)
 
-          if (floatingLink.id > this.#lastFloatingLinkId)
-            this.#lastFloatingLinkId = floatingLink.id
+          if (floatingLink.id > this._lastFloatingLinkId)
+            this._lastFloatingLinkId = floatingLink.id
         }
       }
 

src/lib/litegraph/src/LGraphCanvas.ts

@@ -316,17 +316,17 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     selectionChanged: false
   }
 
-  #subgraph?: Subgraph
+  private _subgraph?: Subgraph
   get subgraph(): Subgraph | undefined {
-    return this.#subgraph
+    return this._subgraph
   }
 
   set subgraph(value: Subgraph | undefined) {
-    if (value !== this.#subgraph) {
-      this.#subgraph = value
+    if (value !== this._subgraph) {
+      this._subgraph = value
       if (value)
         this.dispatch('litegraph:set-graph', {
-          oldGraph: this.#subgraph,
+          oldGraph: this._subgraph,
           newGraph: value
         })
     }
@@ -361,7 +361,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     this.canvas.dispatchEvent(new CustomEvent(type, { detail }))
   }
 
-  #updateCursorStyle() {
+  private _updateCursorStyle() {
     if (!this.state.shouldSetCursor) return
 
     const crosshairItems =
@@ -398,7 +398,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
   set read_only(value: boolean) {
     this.state.readOnly = value
-    this.#updateCursorStyle()
+    this._updateCursorStyle()
   }
 
   get isDragging(): boolean {
@@ -415,7 +415,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
   set hoveringOver(value: CanvasItem) {
     this.state.hoveringOver = value
-    this.#updateCursorStyle()
+    this._updateCursorStyle()
   }
 
   /** @deprecated Replace all references with {@link pointer}.{@link CanvasPointer.isDown isDown}. */
@@ -435,7 +435,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
   set dragging_canvas(value: boolean) {
     this.state.draggingCanvas = value
-    this.#updateCursorStyle()
+    this._updateCursorStyle()
   }
 
   /**
@@ -450,16 +450,16 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     return `normal ${LiteGraph.NODE_SUBTEXT_SIZE}px ${LiteGraph.NODE_FONT}`
   }
 
-  #maximumFrameGap = 0
+  private _maximumFrameGap = 0
   /** Maximum frames per second to render. 0: unlimited. Default: 0 */
   public get maximumFps() {
-    return this.#maximumFrameGap > Number.EPSILON
-      ? this.#maximumFrameGap / 1000
+    return this._maximumFrameGap > Number.EPSILON
+      ? this._maximumFrameGap / 1000
       : 0
   }
 
   public set maximumFps(value) {
-    this.#maximumFrameGap = value > Number.EPSILON ? 1000 / value : 0
+    this._maximumFrameGap = value > Number.EPSILON ? 1000 / value : 0
   }
 
   /**
@@ -660,12 +660,12 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * The IDs of the nodes that are currently visible on the canvas. More
    * performant than {@link visible_nodes} for visibility checks.
    */
-  #visible_node_ids: Set<NodeId> = new Set()
+  private _visible_node_ids: Set<NodeId> = new Set()
   node_over?: LGraphNode
   node_capturing_input?: LGraphNode | null
   highlighted_links: Dictionary<boolean> = {}
 
-  #visibleReroutes: Set<Reroute> = new Set()
+  private _visibleReroutes: Set<Reroute> = new Set()
 
   dirty_canvas: boolean = true
   dirty_bgcanvas: boolean = true
@@ -725,9 +725,9 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
   NODEPANEL_IS_OPEN?: boolean
 
   /** Once per frame check of snap to grid value.  @todo Update on change. */
-  #snapToGrid?: number
+  private _snapToGrid?: number
   /** Set on keydown, keyup. @todo */
-  #shiftDown: boolean = false
+  private _shiftDown: boolean = false
 
   /** Link rendering adapter for litegraph-to-canvas integration */
   linkRenderer: LitegraphLinkAdapter | null = null
@@ -735,7 +735,11 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
   /** If true, enable drag zoom. Ctrl+Shift+Drag Up/Down: zoom canvas. */
   dragZoomEnabled: boolean = false
   /** The start position of the drag zoom and original read-only state. */
-  #dragZoomStart: { pos: Point; scale: number; readOnly: boolean } | null = null
+  private _dragZoomStart: {
+    pos: Point
+    scale: number
+    readOnly: boolean
+  } | null = null
 
   /** If true, enable live selection during drag. Nodes are selected/deselected in real-time. */
   liveSelection: boolean = false
@@ -810,7 +814,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     }
 
     this.linkConnector.events.addEventListener('link-created', () =>
-      this.#dirty()
+      this._dirty()
     )
 
     // @deprecated Workaround: Keep until connecting_links is removed.
@@ -1808,7 +1812,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
     this.dragging_canvas = false
 
-    this.#dirty()
+    this._dirty()
     this.dirty_area = null
 
     this.node_in_panel = null
@@ -1836,7 +1840,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     this.linkRenderer = new LitegraphLinkAdapter(false)
 
     this.dispatch('litegraph:set-graph', { newGraph, oldGraph: graph })
-    this.#dirty()
+    this._dirty()
   }
 
   openSubgraph(subgraph: Subgraph, fromNode: SubgraphNode): void {
@@ -1873,7 +1877,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * @returns The canvas element
    * @throws If {@link canvas} is an element ID that does not belong to a valid HTML canvas element
    */
-  #validateCanvas(
+  private _validateCanvas(
     canvas: string | HTMLCanvasElement
   ): HTMLCanvasElement & { data?: LGraphCanvas } {
     if (typeof canvas === 'string') {
@@ -1892,7 +1896,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * @param skip_events If true, events on the previous canvas will not be removed.  Has no effect on the first invocation.
    */
   setCanvas(canvas: string | HTMLCanvasElement, skip_events?: boolean) {
-    const element = this.#validateCanvas(canvas)
+    const element = this._validateCanvas(canvas)
     if (element === this.canvas) return
     // maybe detach events from old_canvas
     if (!element && this.canvas && !skip_events) this.unbindEvents()
@@ -1905,7 +1909,12 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
     // TODO: classList.add
     element.className += ' lgraphcanvas'
-    element.data = this
+    Object.defineProperty(element, 'data', {
+      value: this,
+      writable: true,
+      configurable: true,
+      enumerable: false
+    })
 
     // Background canvas: To render objects behind nodes (background, links, groups)
     this.bgcanvas = document.createElement('canvas')
@@ -2026,12 +2035,12 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
   }
 
   /** Marks the entire canvas as dirty. */
-  #dirty(): void {
+  private _dirty(): void {
     this.dirty_canvas = true
     this.dirty_bgcanvas = true
   }
 
-  #linkConnectorDrop(): void {
+  private _linkConnectorDrop(): void {
     const { graph, linkConnector, pointer } = this
     if (!graph) throw new NullGraphError()
 
@@ -2070,10 +2079,10 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
       const window = this.getCanvasWindow()
       if (this.is_rendering) {
-        if (this.#maximumFrameGap > 0) {
+        if (this._maximumFrameGap > 0) {
           // Manual FPS limit
           const gap =
-            this.#maximumFrameGap - (LiteGraph.getTime() - this.last_draw_time)
+            this._maximumFrameGap - (LiteGraph.getTime() - this.last_draw_time)
           setTimeout(renderFrame.bind(this), Math.max(1, gap))
         } else {
           // FPS limited by refresh rate
@@ -2161,7 +2170,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
       !e.altKey &&
       e.buttons
     ) {
-      this.#dragZoomStart = {
+      this._dragZoomStart = {
         pos: [e.x, e.y],
         scale: this.ds.scale,
         readOnly: this.read_only
@@ -2208,9 +2217,9 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
     // left button mouse / single finger
     if (e.button === 0 && !pointer.isDouble) {
-      this.#processPrimaryButton(e, node)
+      this._processPrimaryButton(e, node)
     } else if (e.button === 1) {
-      this.#processMiddleButton(e, node)
+      this._processMiddleButton(e, node)
     } else if (
       (e.button === 2 || pointer.isDouble) &&
       this.allow_interaction &&
@@ -2246,7 +2255,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
             reroute = graph.getRerouteOnPos(
               e.canvasX,
               e.canvasY,
-              this.#visibleReroutes
+              this._visibleReroutes
             )
           }
           if (reroute) {
@@ -2302,18 +2311,24 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * @param y The y coordinate in canvas space
    * @returns The positionable item or undefined
    */
-  #getPositionableOnPos(x: number, y: number): Positionable | undefined {
+  private _getPositionableOnPos(
+    x: number,
+    y: number
+  ): Positionable | undefined {
     const ioNode = this.subgraph?.getIoNodeOnPos(x, y)
     if (ioNode) return ioNode
 
-    for (const reroute of this.#visibleReroutes) {
+    for (const reroute of this._visibleReroutes) {
       if (reroute.containsPoint([x, y])) return reroute
     }
 
     return this.graph?.getGroupTitlebarOnPos(x, y)
   }
 
-  #processPrimaryButton(e: CanvasPointerEvent, node: LGraphNode | undefined) {
+  private _processPrimaryButton(
+    e: CanvasPointerEvent,
+    node: LGraphNode | undefined
+  ) {
     const { pointer, graph, linkConnector, subgraph } = this
     if (!graph) throw new NullGraphError()
 
@@ -2329,7 +2344,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
       !e.altKey &&
       LiteGraph.leftMouseClickBehavior === 'panning'
     ) {
-      this.#setupNodeSelectionDrag(e, pointer, node)
+      this._setupNodeSelectionDrag(e, pointer, node)
 
       return
     }
@@ -2360,16 +2375,16 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
       if (this.allow_dragnodes) {
         pointer.onDragStart = (pointer) => {
-          this.#startDraggingItems(cloned, pointer)
+          this._startDraggingItems(cloned, pointer)
         }
-        pointer.onDragEnd = (e) => this.#processDraggedItems(e)
+        pointer.onDragEnd = (e) => this._processDraggedItems(e)
       }
       return
     }
 
     // Node clicked
     if (node && (this.allow_interaction || node.flags.allow_interaction)) {
-      this.#processNodeClick(e, ctrlOrMeta, node)
+      this._processNodeClick(e, ctrlOrMeta, node)
     } else {
       // Subgraph IO nodes
       if (subgraph) {
@@ -2387,8 +2402,8 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
           ioNode.onPointerDown(e, pointer, linkConnector)
           pointer.onClick ??= () => canvas.processSelect(ioNode, e)
           pointer.onDragStart ??= () =>
-            canvas.#startDraggingItems(ioNode, pointer, true)
-          pointer.onDragEnd ??= (eUp) => canvas.#processDraggedItems(eUp)
+            canvas._startDraggingItems(ioNode, pointer, true)
+          pointer.onDragEnd ??= (eUp) => canvas._processDraggedItems(eUp)
           return true
         }
       }
@@ -2404,7 +2419,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
         }
 
         // Fallback to checking visible reroutes directly
-        for (const reroute of this.#visibleReroutes) {
+        for (const reroute of this._visibleReroutes) {
           const overReroute =
             foundReroute === reroute || reroute.containsPoint([x, y])
           if (!reroute.isSlotHovered && !overReroute) continue
@@ -2413,19 +2428,19 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
             pointer.onClick = () => this.processSelect(reroute, e)
             if (!e.shiftKey) {
               pointer.onDragStart = (pointer) =>
-                this.#startDraggingItems(reroute, pointer, true)
-              pointer.onDragEnd = (e) => this.#processDraggedItems(e)
+                this._startDraggingItems(reroute, pointer, true)
+              pointer.onDragEnd = (e) => this._processDraggedItems(e)
             }
           }
 
           if (reroute.isOutputHovered || (overReroute && e.shiftKey)) {
             linkConnector.dragFromReroute(graph, reroute)
-            this.#linkConnectorDrop()
+            this._linkConnectorDrop()
           }
 
           if (reroute.isInputHovered) {
             linkConnector.dragFromRerouteToOutput(graph, reroute)
-            this.#linkConnectorDrop()
+            this._linkConnectorDrop()
           }
 
           reroute.hideSlots()
@@ -2470,14 +2485,14 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
           if (e.shiftKey && !e.altKey) {
             linkConnector.dragFromLinkSegment(graph, linkSegment)
-            this.#linkConnectorDrop()
+            this._linkConnectorDrop()
 
             return
           } else if (e.altKey && !e.shiftKey) {
             const newReroute = graph.createReroute([x, y], linkSegment)
             pointer.onDragStart = (pointer) =>
-              this.#startDraggingItems(newReroute, pointer)
-            pointer.onDragEnd = (e) => this.#processDraggedItems(e)
+              this._startDraggingItems(newReroute, pointer)
+            pointer.onDragEnd = (e) => this._processDraggedItems(e)
             return
           }
         } else if (
@@ -2519,7 +2534,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
               eMove.canvasY - group.pos[1] - offsetY
             ]
             // Unless snapping.
-            if (this.#snapToGrid) snapPoint(pos, this.#snapToGrid)
+            if (this._snapToGrid) snapPoint(pos, this._snapToGrid)
 
             const resized = group.resize(pos[0], pos[1])
             if (resized) this.dirty_bgcanvas = true
@@ -2542,9 +2557,9 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
             pointer.onClick = () => this.processSelect(group, e)
             pointer.onDragStart = (pointer) => {
               group.recomputeInsideNodes()
-              this.#startDraggingItems(group, pointer, true)
+              this._startDraggingItems(group, pointer, true)
             }
-            pointer.onDragEnd = (e) => this.#processDraggedItems(e)
+            pointer.onDragEnd = (e) => this._processDraggedItems(e)
           }
         }
 
@@ -2582,12 +2597,12 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
         pointer.finally = () => (this.dragging_canvas = false)
         this.dragging_canvas = true
       } else {
-        this.#setupNodeSelectionDrag(e, pointer)
+        this._setupNodeSelectionDrag(e, pointer)
       }
     }
   }
 
-  #setupNodeSelectionDrag(
+  private _setupNodeSelectionDrag(
     e: CanvasPointerEvent,
     pointer: CanvasPointer,
     node?: LGraphNode | undefined
@@ -2602,7 +2617,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     pointer.onClick = (eUp) => {
       // Click, not drag
       const clickedItem =
-        node ?? this.#getPositionableOnPos(eUp.canvasX, eUp.canvasY)
+        node ?? this._getPositionableOnPos(eUp.canvasX, eUp.canvasY)
       this.processSelect(clickedItem, eUp)
     }
     pointer.onDragStart = () => (this.dragging_rectangle = dragRect)
@@ -2617,7 +2632,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     } else {
       // Classic mode: select only when drag ends
       pointer.onDragEnd = (upEvent) =>
-        this.#handleMultiSelect(upEvent, dragRect)
+        this._handleMultiSelect(upEvent, dragRect)
     }
 
     pointer.finally = () => (this.dragging_rectangle = null)
@@ -2629,7 +2644,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * @param ctrlOrMeta Ctrl or meta key is pressed
    * @param node The node to process a click event for
    */
-  #processNodeClick(
+  private _processNodeClick(
     e: CanvasPointerEvent,
     ctrlOrMeta: boolean,
     node: LGraphNode
@@ -2685,13 +2700,13 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
             // Drag multiple output links
             if (e.shiftKey && hasRelevantOutputLinks(output, graph)) {
               linkConnector.moveOutputLink(graph, output)
-              this.#linkConnectorDrop()
+              this._linkConnectorDrop()
               return
             }
 
             // New output link
             linkConnector.dragNewFromOutput(graph, node, output)
-            this.#linkConnectorDrop()
+            this._linkConnectorDrop()
 
             if (LiteGraph.shift_click_do_break_link_from) {
               if (e.shiftKey) {
@@ -2744,7 +2759,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
               linkConnector.dragNewFromInput(graph, node, input)
             }
 
-            this.#linkConnectorDrop()
+            this._linkConnectorDrop()
             this.dirty_bgcanvas = true
 
             return
@@ -2874,7 +2889,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
             }
 
             // Apply snapping to position changes
-            if (this.#snapToGrid) {
+            if (this._snapToGrid) {
               if (
                 resizeDirection.includes('N') ||
                 resizeDirection.includes('W')
@@ -2882,7 +2897,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
                 const originalX = newBounds.x
                 const originalY = newBounds.y
 
-                snapPoint(newBounds.pos, this.#snapToGrid)
+                snapPoint(newBounds.pos, this._snapToGrid)
 
                 // Adjust size to compensate for snapped position
                 if (resizeDirection.includes('N')) {
@@ -2893,7 +2908,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
                 }
               }
 
-              snapPoint(newBounds.size, this.#snapToGrid)
+              snapPoint(newBounds.size, this._snapToGrid)
             }
 
             // Apply snapping to size changes
@@ -2918,11 +2933,11 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
             node.pos = newBounds.pos
             node.setSize(newBounds.size)
 
-            this.#dirty()
+            this._dirty()
           }
 
           pointer.onDragEnd = () => {
-            this.#dirty()
+            this._dirty()
             graph.afterChange(node)
           }
           pointer.finally = () => {
@@ -2938,8 +2953,8 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
 
       // Drag node
       pointer.onDragStart = (pointer) =>
-        this.#startDraggingItems(node, pointer, true)
-      pointer.onDragEnd = (e) => this.#processDraggedItems(e)
+        this._startDraggingItems(node, pointer, true)
+      pointer.onDragEnd = (e) => this._processDraggedItems(e)
     }
 
     this.dirty_canvas = true
@@ -3008,7 +3023,10 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * @param e The pointerdown event
    * @param node The node to process a click event for
    */
-  #processMiddleButton(e: CanvasPointerEvent, node: LGraphNode | undefined) {
+  private _processMiddleButton(
+    e: CanvasPointerEvent,
+    node: LGraphNode | undefined
+  ) {
     const { pointer } = this
 
     if (
@@ -3105,14 +3123,14 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     }
   }
 
-  #processDragZoom(e: PointerEvent): void {
+  private _processDragZoom(e: PointerEvent): void {
     // stop canvas zoom action
     if (!e.buttons) {
-      this.#finishDragZoom()
+      this._finishDragZoom()
       return
     }
 
-    const start = this.#dragZoomStart
+    const start = this._dragZoomStart
     if (!start) throw new TypeError('Drag-zoom state object was null')
     if (!this.graph) throw new NullGraphError()
 
@@ -3126,10 +3144,10 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     this.graph.change()
   }
 
-  #finishDragZoom(): void {
-    const start = this.#dragZoomStart
+  private _finishDragZoom(): void {
+    const start = this._dragZoomStart
     if (!start) return
-    this.#dragZoomStart = null
+    this._dragZoomStart = null
     this.read_only = start.readOnly
   }
 
@@ -3141,9 +3159,9 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
       this.dragZoomEnabled &&
       e.ctrlKey &&
       e.shiftKey &&
-      this.#dragZoomStart
+      this._dragZoomStart
     ) {
-      this.#processDragZoom(e)
+      this._processDragZoom(e)
       return
     }
 
@@ -3210,7 +3228,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     } else if (this.dragging_canvas) {
       this.ds.offset[0] += delta[0] / this.ds.scale
       this.ds.offset[1] += delta[1] / this.ds.scale
-      this.#dirty()
+      this._dirty()
     } else if (
       (this.allow_interaction || node?.flags.allow_interaction) &&
       !this.read_only
@@ -3258,7 +3276,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
           this.node_over = node
           this.dirty_canvas = true
 
-          for (const reroute of this.#visibleReroutes) {
+          for (const reroute of this._visibleReroutes) {
             reroute.hideSlots()
             this.dirty_bgcanvas = true
           }
@@ -3382,10 +3400,10 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
         }
       } else {
         // Reroutes
-        underPointer = this.#updateReroutes(underPointer)
+        underPointer = this._updateReroutes(underPointer)
 
         // Not over a node
-        const segment = this.#getLinkCentreOnPos(e)
+        const segment = this._getLinkCentreOnPos(e)
         if (this.over_link_center !== segment) {
           underPointer |= CanvasItem.Link
           this.over_link_center = segment
@@ -3435,7 +3453,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
           }
         }
 
-        this.#dirty()
+        this._dirty()
       }
     }
 
@@ -3449,14 +3467,14 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * Updates the hover / snap state of all visible reroutes.
    * @returns The original value of {@link underPointer}, with any found reroute items added.
    */
-  #updateReroutes(underPointer: CanvasItem): CanvasItem {
+  private _updateReroutes(underPointer: CanvasItem): CanvasItem {
     const { graph, pointer, linkConnector } = this
     if (!graph) throw new NullGraphError()
 
     // Update reroute hover state
     if (!pointer.isDown) {
       let anyChanges = false
-      for (const reroute of this.#visibleReroutes) {
+      for (const reroute of this._visibleReroutes) {
         anyChanges ||= reroute.updateVisibility(this.graph_mouse)
 
         if (reroute.isSlotHovered) underPointer |= CanvasItem.RerouteSlot
@@ -3464,7 +3482,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
       if (anyChanges) this.dirty_bgcanvas = true
     } else if (linkConnector.isConnecting) {
       // Highlight the reroute that the mouse is over
-      for (const reroute of this.#visibleReroutes) {
+      for (const reroute of this._visibleReroutes) {
         if (reroute.containsPoint(this.graph_mouse)) {
           if (linkConnector.isRerouteValidDrop(reroute)) {
             linkConnector.overReroute = reroute
@@ -3489,7 +3507,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * @param pointer The pointer event that initiated the drag, e.g. pointerdown
    * @param sticky If `true`, the item is added to the selection - see {@link processSelect}
    */
-  #startDraggingItems(
+  private _startDraggingItems(
     item: Positionable,
     pointer: CanvasPointer,
     sticky = false
@@ -3511,7 +3529,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * Handles shared clean up and placement after items have been dragged.
    * @param e The event that completed the drag, e.g. pointerup, pointermove
    */
-  #processDraggedItems(e: CanvasPointerEvent): void {
+  private _processDraggedItems(e: CanvasPointerEvent): void {
     const { graph } = this
     if (e.shiftKey || LiteGraph.alwaysSnapToGrid)
       graph?.snapToGrid(this.selectedItems)
@@ -3533,7 +3551,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     const { graph, pointer } = this
     if (!graph) return
 
-    this.#finishDragZoom()
+    this._finishDragZoom()
 
     LGraphCanvas.active_canvas = this
 
@@ -3677,7 +3695,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     return
   }
 
-  #noItemsSelected(): void {
+  private _noItemsSelected(): void {
     const event = new CustomEvent('litegraph:no-items-selected', {
       bubbles: true
     })
@@ -3688,7 +3706,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * process a key event
    */
   processKey(e: KeyboardEvent): void {
-    this.#shiftDown = e.shiftKey
+    this._shiftDown = e.shiftKey
 
     const { graph } = this
     if (!graph) return
@@ -3735,7 +3753,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
         // @ts-expect-error EventTarget.localName is not in standard types
         if (e.target.localName != 'input' && e.target.localName != 'textarea') {
           if (this.selectedItems.size === 0) {
-            this.#noItemsSelected()
+            this._noItemsSelected()
             return
           }
 
@@ -4097,7 +4115,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * @param dragRect The drag rectangle to normalize (modified in place)
    * @returns The normalized rectangle
    */
-  #normalizeDragRect(dragRect: Rect): Rect {
+  private _normalizeDragRect(dragRect: Rect): Rect {
     const w = Math.abs(dragRect[2])
     const h = Math.abs(dragRect[3])
     if (dragRect[2] < 0) dragRect[0] -= w
@@ -4112,7 +4130,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * @param rect The rectangle to check against
    * @returns Set of positionable items that overlap with the rectangle
    */
-  #getItemsInRect(rect: Rect): Set<Positionable> {
+  private _getItemsInRect(rect: Rect): Set<Positionable> {
     const { graph, subgraph } = this
     if (!graph) throw new NullGraphError()
 
@@ -4166,9 +4184,9 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
       dragRect[2],
       dragRect[3]
     ]
-    this.#normalizeDragRect(normalizedRect)
+    this._normalizeDragRect(normalizedRect)
 
-    const itemsInRect = this.#getItemsInRect(normalizedRect)
+    const itemsInRect = this._getItemsInRect(normalizedRect)
 
     const desired = new Set<Positionable>()
     if (e.shiftKey && !e.altKey) {
@@ -4215,16 +4233,16 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * @param e The pointer up event
    * @param dragRect The drag rectangle
    */
-  #handleMultiSelect(e: CanvasPointerEvent, dragRect: Rect): void {
+  private _handleMultiSelect(e: CanvasPointerEvent, dragRect: Rect): void {
     const normalizedRect: Rect = [
       dragRect[0],
       dragRect[1],
       dragRect[2],
       dragRect[3]
     ]
-    this.#normalizeDragRect(normalizedRect)
+    this._normalizeDragRect(normalizedRect)
 
-    const itemsInRect = this.#getItemsInRect(normalizedRect)
+    const itemsInRect = this._getItemsInRect(normalizedRect)
     const { selectedItems } = this
 
     if (e.shiftKey) {
@@ -4588,7 +4606,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    */
   setZoom(value: number, zooming_center: Point) {
     this.ds.changeScale(value, zooming_center)
-    this.#dirty()
+    this._dirty()
   }
 
   /**
@@ -4671,7 +4689,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * @returns `true` if the node is visible, otherwise `false`
    */
   isNodeVisible(node: LGraphNode): boolean {
-    return this.#visible_node_ids.has(node.id)
+    return this._visible_node_ids.has(node.id)
   }
 
   /**
@@ -4692,7 +4710,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     if (this.dirty_canvas || force_canvas) {
       this.computeVisibleNodes(undefined, this.visible_nodes)
       // Update visible node IDs
-      this.#visible_node_ids = new Set(
+      this._visible_node_ids = new Set(
         this.visible_nodes.map((node) => node.id)
       )
 
@@ -4746,8 +4764,8 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     }
 
     // TODO: Set snapping value when changed instead of once per frame
-    this.#snapToGrid =
-      this.#shiftDown || LiteGraph.alwaysSnapToGrid
+    this._snapToGrid =
+      this._shiftDown || LiteGraph.alwaysSnapToGrid
         ? this.graph?.getSnapToGridSize()
         : undefined
 
@@ -4789,7 +4807,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
       // draw nodes
       const { visible_nodes } = this
       const drawSnapGuides =
-        this.#snapToGrid &&
+        this._snapToGrid &&
         (this.isDragging || layoutStore.isDraggingVueNodes.value)
 
       for (const node of visible_nodes) {
@@ -4829,7 +4847,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
       if (linkConnector.isConnecting) {
         // current connection (the one being dragged by the mouse)
         const { renderLinks } = linkConnector
-        const highlightPos = this.#getHighlightPosition()
+        const highlightPos = this._getHighlightPosition()
         ctx.lineWidth = this.connections_width
 
         for (const renderLink of renderLinks) {
@@ -4883,7 +4901,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
         }
 
         // Gradient half-border over target node
-        this.#renderSnapHighlight(ctx, highlightPos)
+        this._renderSnapHighlight(ctx, highlightPos)
       }
 
       // on top of link center
@@ -4909,7 +4927,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
   }
 
   /** @returns If the pointer is over a link centre marker, the link segment it belongs to.  Otherwise, `undefined`.  */
-  #getLinkCentreOnPos(e: CanvasPointerEvent): LinkSegment | undefined {
+  private _getLinkCentreOnPos(e: CanvasPointerEvent): LinkSegment | undefined {
     // Skip hit detection if center markers are disabled
     if (this.linkMarkerShape === LinkMarkerShape.None) {
       return undefined
@@ -4928,7 +4946,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
   }
 
   /** Get the target snap / highlight point in graph space */
-  #getHighlightPosition(): Readonly<Point> {
+  private _getHighlightPosition(): Readonly<Point> {
     return LiteGraph.snaps_for_comfy
       ? (this.linkConnector.state.snapLinksPos ??
           this._highlight_pos ??
@@ -4941,7 +4959,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
    * Partial border over target node and a highlight over the slot itself.
    * @param ctx Canvas 2D context
    */
-  #renderSnapHighlight(
+  private _renderSnapHighlight(
     ctx: CanvasRenderingContext2D,
     highlightPos: Readonly<Point>
   ): void {
@@ -5592,7 +5610,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     // Normalise boundingRect to pos to snap
     snapGuide[0] += offsetX
     snapGuide[1] += offsetY
-    if (this.#snapToGrid) snapPoint(snapGuide, this.#snapToGrid)
+    if (this._snapToGrid) snapPoint(snapGuide, this._snapToGrid)
     snapGuide[0] -= offsetX
     snapGuide[1] -= offsetY
 
@@ -5672,7 +5690,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
         const output = start_node.outputs[outputId]
         if (!output) continue
 
-        this.#renderAllLinkSegments(
+        this._renderAllLinkSegments(
           ctx,
           link,
           startPos,
@@ -5701,7 +5719,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
             ? getSlotPosition(inputNode, link.target_slot, true)
             : inputNode.getInputPos(link.target_slot)
 
-          this.#renderAllLinkSegments(
+          this._renderAllLinkSegments(
             ctx,
             link,
             output.pos,
@@ -5728,7 +5746,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
           ? getSlotPosition(outputNode, link.origin_slot, false)
           : outputNode.getOutputPos(link.origin_slot)
 
-        this.#renderAllLinkSegments(
+        this._renderAllLinkSegments(
           ctx,
           link,
           startPos,
@@ -5742,10 +5760,10 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     }
 
     if (graph.floatingLinks.size > 0) {
-      this.#renderFloatingLinks(ctx, graph, visibleReroutes, now)
+      this._renderFloatingLinks(ctx, graph, visibleReroutes, now)
     }
 
-    const rerouteSet = this.#visibleReroutes
+    const rerouteSet = this._visibleReroutes
     rerouteSet.clear()
 
     // Render reroutes, ordered by number of non-floating links
@@ -5754,7 +5772,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
       rerouteSet.add(reroute)
 
       if (
-        this.#snapToGrid &&
+        this._snapToGrid &&
         this.isDragging &&
         this.selectedItems.has(reroute)
       ) {
@@ -5776,7 +5794,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
         : this.editor_alpha
   }
 
-  #renderFloatingLinks(
+  private _renderFloatingLinks(
     ctx: CanvasRenderingContext2D,
     graph: LGraph,
     visibleReroutes: Reroute[],
@@ -5805,7 +5823,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
         const endDirection = node.inputs[link.target_slot]?.dir
 
         firstReroute._dragging = true
-        this.#renderAllLinkSegments(
+        this._renderAllLinkSegments(
           ctx,
           link,
           startPos,
@@ -5827,7 +5845,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
         const startDirection = node.outputs[link.origin_slot]?.dir
 
         link._dragging = true
-        this.#renderAllLinkSegments(
+        this._renderAllLinkSegments(
           ctx,
           link,
           startPos,
@@ -5843,7 +5861,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     ctx.globalAlpha = globalAlpha
   }
 
-  #renderAllLinkSegments(
+  private _renderAllLinkSegments(
     ctx: CanvasRenderingContext2D,
     link: LLink,
     startPos: Point,
@@ -6146,7 +6164,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     ctx.save()
     ctx.globalAlpha = 0.5 * this.editor_alpha
     const drawSnapGuides =
-      this.#snapToGrid &&
+      this._snapToGrid &&
       (this.isDragging || layoutStore.isDraggingVueNodes.value)
 
     for (const group of groups) {
@@ -6513,7 +6531,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
       },
       optPass || {}
     )
-    const dirty = () => this.#dirty()
+    const dirty = () => this._dirty()
 
     const that = this
     const { graph } = this
@@ -7522,7 +7540,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     function inner() {
       setValue(input?.value)
     }
-    const dirty = () => this.#dirty()
+    const dirty = () => this._dirty()
 
     function setValue(value: string | number | undefined) {
       if (
@@ -8356,7 +8374,7 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
           reroute = this.graph.getRerouteOnPos(
             event.canvasX,
             event.canvasY,
-            this.#visibleReroutes
+            this._visibleReroutes
           )
         }
         if (reroute) {
@@ -8646,4 +8664,17 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     const mutations = this.initLayoutMutations()
     this.applyNodePositionUpdates(nodesToReposition, mutations)
   }
+
+  /**
+   * Custom JSON serialization to prevent circular reference errors.
+   * LGraphCanvas should not be serialized directly - serialize the graph instead.
+   */
+  toJSON(): { ds: { scale: number; offset: [number, number] } } {
+    return {
+      ds: {
+        scale: this.ds.scale,
+        offset: [...this.ds.offset] as [number, number]
+      }
+    }
+  }
 }

src/lib/litegraph/src/LGraphNode.ts

@@ -273,8 +273,8 @@ export class LGraphNode
   inputs: INodeInputSlot[] = []
   outputs: INodeOutputSlot[] = []
 
-  #concreteInputs: NodeInputSlot[] = []
-  #concreteOutputs: NodeOutputSlot[] = []
+  private _concreteInputs: NodeInputSlot[] = []
+  private _concreteOutputs: NodeOutputSlot[] = []
 
   properties: Dictionary<NodeProperty | undefined> = {}
   properties_info: INodePropertyInfo[] = []
@@ -438,24 +438,24 @@ export class LGraphNode
   }
 
   /** @inheritdoc {@link renderArea} */
-  #renderArea = new Rectangle()
+  private _renderArea = new Rectangle()
   /**
    * Rect describing the node area, including shadows and any protrusions.
    * Determines if the node is visible.  Calculated once at the start of every frame.
    */
   get renderArea(): ReadOnlyRect {
-    return this.#renderArea
+    return this._renderArea
   }
 
   /** @inheritdoc {@link boundingRect} */
-  #boundingRect: Rectangle = new Rectangle()
+  private _boundingRect: Rectangle = new Rectangle()
   /**
    * Cached node position & area as `x, y, width, height`.  Includes changes made by {@link onBounding}, if present.
    *
    * Determines the node hitbox and other rendering effects.  Calculated once at the start of every frame.
    */
   get boundingRect(): ReadOnlyRectangle {
-    return this.#boundingRect
+    return this._boundingRect
   }
 
   /** The offset from {@link pos} to the top-left of {@link boundingRect}. */
@@ -753,7 +753,9 @@ export class LGraphNode
   onPropertyChange?(this: LGraphNode): void
   updateOutputData?(this: LGraphNode, origin_slot: number): void
 
-  #getErrorStrokeStyle(this: LGraphNode): IDrawBoundingOptions | undefined {
+  private _getErrorStrokeStyle(
+    this: LGraphNode
+  ): IDrawBoundingOptions | undefined {
     if (this.has_errors) {
       return {
         padding: 12,
@@ -763,7 +765,9 @@ export class LGraphNode
     }
   }
 
-  #getSelectedStrokeStyle(this: LGraphNode): IDrawBoundingOptions | undefined {
+  private _getSelectedStrokeStyle(
+    this: LGraphNode
+  ): IDrawBoundingOptions | undefined {
     if (this.selected) {
       return {
         padding: this.has_errors ? 20 : undefined
@@ -778,8 +782,8 @@ export class LGraphNode
     this.size = [LiteGraph.NODE_WIDTH, 60]
     this.pos = [10, 10]
     this.strokeStyles = {
-      error: this.#getErrorStrokeStyle,
-      selected: this.#getSelectedStrokeStyle
+      error: this._getErrorStrokeStyle,
+      selected: this._getSelectedStrokeStyle
     }
     // Initialize property manager with tracked properties
     this.changeTracker = new LGraphNodeProperties(this)
@@ -2067,11 +2071,11 @@ export class LGraphNode
    * Called automatically at the start of every frame.
    */
   updateArea(ctx?: CanvasRenderingContext2D): void {
-    const bounds = this.#boundingRect
+    const bounds = this._boundingRect
     this.measure(bounds, ctx)
     this.onBounding?.(bounds)
 
-    const renderArea = this.#renderArea
+    const renderArea = this._renderArea
     renderArea.set(bounds)
     // 4 offset for collapsed node connection points
     renderArea[0] -= 4
@@ -2293,7 +2297,7 @@ export class LGraphNode
     optsIn?: FindFreeSlotOptions & { returnObj?: TReturn }
   ): INodeInputSlot | -1
   findInputSlotFree(optsIn?: FindFreeSlotOptions) {
-    return this.#findFreeSlot(this.inputs, optsIn)
+    return this._findFreeSlot(this.inputs, optsIn)
   }
 
   /**
@@ -2308,14 +2312,14 @@ export class LGraphNode
     optsIn?: FindFreeSlotOptions & { returnObj?: TReturn }
   ): INodeOutputSlot | -1
   findOutputSlotFree(optsIn?: FindFreeSlotOptions) {
-    return this.#findFreeSlot(this.outputs, optsIn)
+    return this._findFreeSlot(this.outputs, optsIn)
   }
 
   /**
    * Finds the next free slot
    * @param slots The slots to search, i.e. this.inputs or this.outputs
    */
-  #findFreeSlot<TSlot extends INodeInputSlot | INodeOutputSlot>(
+  private _findFreeSlot<TSlot extends INodeInputSlot | INodeOutputSlot>(
     slots: TSlot[],
     options?: FindFreeSlotOptions
   ): TSlot | number {
@@ -2357,7 +2361,7 @@ export class LGraphNode
     preferFreeSlot?: boolean,
     doNotUseOccupied?: boolean
   ) {
-    return this.#findSlotByType(
+    return this._findSlotByType(
       this.inputs,
       type,
       returnObj,
@@ -2387,7 +2391,7 @@ export class LGraphNode
     preferFreeSlot?: boolean,
     doNotUseOccupied?: boolean
   ) {
-    return this.#findSlotByType(
+    return this._findSlotByType(
       this.outputs,
       type,
       returnObj,
@@ -2433,14 +2437,14 @@ export class LGraphNode
     doNotUseOccupied?: boolean
   ): number | INodeOutputSlot | INodeInputSlot {
     return input
-      ? this.#findSlotByType(
+      ? this._findSlotByType(
           this.inputs,
           type,
           returnObj,
           preferFreeSlot,
           doNotUseOccupied
         )
-      : this.#findSlotByType(
+      : this._findSlotByType(
           this.outputs,
           type,
           returnObj,
@@ -2461,7 +2465,7 @@ export class LGraphNode
    * @see {findInputSlotByType}
    * @returns If a match is found, the slot if returnObj is true, otherwise the index.  If no matches are found, -1
    */
-  #findSlotByType<TSlot extends INodeInputSlot | INodeOutputSlot>(
+  private _findSlotByType<TSlot extends INodeInputSlot | INodeOutputSlot>(
     slots: TSlot[],
     type: ISlotType,
     returnObj?: boolean,
@@ -3310,8 +3314,8 @@ export class LGraphNode
     // default vertical slots
     const offset = LiteGraph.NODE_SLOT_HEIGHT * 0.5
     const slotIndex = is_input
-      ? this.#defaultVerticalInputs.indexOf(this.inputs[slot_number])
-      : this.#defaultVerticalOutputs.indexOf(this.outputs[slot_number])
+      ? this._defaultVerticalInputs.indexOf(this.inputs[slot_number])
+      : this._defaultVerticalOutputs.indexOf(this.outputs[slot_number])
 
     out[0] = is_input ? nodeX + offset : nodeX + this.size[0] + 1 - offset
     out[1] =
@@ -3324,7 +3328,7 @@ export class LGraphNode
   /**
    * @internal The inputs that are not positioned with absolute coordinates.
    */
-  get #defaultVerticalInputs() {
+  private get _defaultVerticalInputs() {
     return this.inputs.filter(
       (slot) => !slot.pos && !(this.widgets?.length && isWidgetInputSlot(slot))
     )
@@ -3333,7 +3337,7 @@ export class LGraphNode
   /**
    * @internal The outputs that are not positioned with absolute coordinates.
    */
-  get #defaultVerticalOutputs() {
+  private get _defaultVerticalOutputs() {
     return this.outputs.filter((slot: INodeOutputSlot) => !slot.pos)
   }
 
@@ -3341,7 +3345,7 @@ export class LGraphNode
    * Get the context needed for slot position calculations
    * @internal
    */
-  #getSlotPositionContext(): SlotPositionContext {
+  private _getSlotPositionContext(): SlotPositionContext {
     return {
       nodeX: this.pos[0],
       nodeY: this.pos[1],
@@ -3373,7 +3377,7 @@ export class LGraphNode
    * @returns Position of the centre of the input slot in graph co-ordinates.
    */
   getInputSlotPos(input: INodeInputSlot): Point {
-    return calculateInputSlotPosFromSlot(this.#getSlotPositionContext(), input)
+    return calculateInputSlotPosFromSlot(this._getSlotPositionContext(), input)
   }
 
   /**
@@ -3916,13 +3920,13 @@ export class LGraphNode
    */
   drawCollapsedSlots(ctx: CanvasRenderingContext2D): void {
     // Render the first connected slot only.
-    for (const slot of this.#concreteInputs) {
+    for (const slot of this._concreteInputs) {
       if (slot.link != null) {
         slot.drawCollapsed(ctx)
         break
       }
     }
-    for (const slot of this.#concreteOutputs) {
+    for (const slot of this._concreteOutputs) {
       if (slot.links?.length) {
         slot.drawCollapsed(ctx)
         break
@@ -3934,7 +3938,7 @@ export class LGraphNode
     return [...this.inputs, ...this.outputs]
   }
 
-  #measureSlot(
+  private _measureSlot(
     slot: NodeInputSlot | NodeOutputSlot,
     slotIndex: number,
     isInput: boolean
@@ -3951,27 +3955,27 @@ export class LGraphNode
     slot.boundingRect[3] = LiteGraph.NODE_SLOT_HEIGHT
   }
 
-  #measureSlots(): ReadOnlyRect | null {
+  private _measureSlots(): ReadOnlyRect | null {
     const slots: (NodeInputSlot | NodeOutputSlot)[] = []
 
-    for (const [slotIndex, slot] of this.#concreteInputs.entries()) {
+    for (const [slotIndex, slot] of this._concreteInputs.entries()) {
       // Unrecognized nodes (Nodes with error) has inputs but no widgets. Treat
       // converted inputs as normal inputs.
       /** Widget input slots are handled in {@link layoutWidgetInputSlots} */
       if (this.widgets?.length && isWidgetInputSlot(slot)) continue
 
-      this.#measureSlot(slot, slotIndex, true)
+      this._measureSlot(slot, slotIndex, true)
       slots.push(slot)
     }
-    for (const [slotIndex, slot] of this.#concreteOutputs.entries()) {
-      this.#measureSlot(slot, slotIndex, false)
+    for (const [slotIndex, slot] of this._concreteOutputs.entries()) {
+      this._measureSlot(slot, slotIndex, false)
       slots.push(slot)
     }
 
     return slots.length ? createBounds(slots, 0) : null
   }
 
-  #getMouseOverSlot(slot: INodeSlot): INodeSlot | null {
+  private _getMouseOverSlot(slot: INodeSlot): INodeSlot | null {
     const isInput = isINodeInputSlot(slot)
     const mouseOverId = this.mouseOver?.[isInput ? 'inputId' : 'outputId'] ?? -1
     if (mouseOverId === -1) {
@@ -3980,11 +3984,11 @@ export class LGraphNode
     return isInput ? this.inputs[mouseOverId] : this.outputs[mouseOverId]
   }
 
-  #isMouseOverSlot(slot: INodeSlot): boolean {
-    return this.#getMouseOverSlot(slot) === slot
+  private _isMouseOverSlot(slot: INodeSlot): boolean {
+    return this._getMouseOverSlot(slot) === slot
   }
 
-  #isMouseOverWidget(widget: IBaseWidget | undefined): boolean {
+  private _isMouseOverWidget(widget: IBaseWidget | undefined): boolean {
     if (!widget) return false
     return this.mouseOver?.overWidget === widget
   }
@@ -4016,9 +4020,9 @@ export class LGraphNode
     ctx: CanvasRenderingContext2D,
     { fromSlot, colorContext, editorAlpha, lowQuality }: DrawSlotsOptions
   ) {
-    for (const slot of [...this.#concreteInputs, ...this.#concreteOutputs]) {
+    for (const slot of [...this._concreteInputs, ...this._concreteOutputs]) {
       const isValidTarget = fromSlot && slot.isValidTarget(fromSlot)
-      const isMouseOverSlot = this.#isMouseOverSlot(slot)
+      const isMouseOverSlot = this._isMouseOverSlot(slot)
 
       // change opacity of incompatible slots when dragging a connection
       const isValid = !fromSlot || isValidTarget
@@ -4033,7 +4037,7 @@ export class LGraphNode
         isMouseOverSlot ||
         isValidTarget ||
         !slot.isWidgetInputSlot ||
-        this.#isMouseOverWidget(this.getWidgetFromSlot(slot)) ||
+        this._isMouseOverWidget(this.getWidgetFromSlot(slot)) ||
         slot.isConnected ||
         slot.alwaysVisible
       ) {
@@ -4054,7 +4058,7 @@ export class LGraphNode
    * -  {@link IBaseWidget.y}
    * @param widgetStartY The y-coordinate of the first widget
    */
-  #arrangeWidgets(widgetStartY: number): void {
+  private _arrangeWidgets(widgetStartY: number): void {
     if (!this.widgets || !this.widgets.length) return
 
     const bodyHeight = this.bodyHeight
@@ -4132,7 +4136,7 @@ export class LGraphNode
   /**
    * Arranges the layout of the node's widget input slots.
    */
-  #arrangeWidgetInputSlots(): void {
+  private _arrangeWidgetInputSlots(): void {
     if (!this.widgets) return
 
     const slotByWidgetName = new Map<
@@ -4154,10 +4158,10 @@ export class LGraphNode
         const slot = slotByWidgetName.get(widget.name)
         if (!slot) continue
 
-        const actualSlot = this.#concreteInputs[slot.index]
+        const actualSlot = this._concreteInputs[slot.index]
         const offset = LiteGraph.NODE_SLOT_HEIGHT * 0.5
         actualSlot.pos = [offset, widget.y + offset]
-        this.#measureSlot(actualSlot, slot.index, true)
+        this._measureSlot(actualSlot, slot.index, true)
       }
     } else {
       // For Vue positioning, just measure the slots without setting pos
@@ -4165,7 +4169,7 @@ export class LGraphNode
         const slot = slotByWidgetName.get(widget.name)
         if (!slot) continue
 
-        this.#measureSlot(this.#concreteInputs[slot.index], slot.index, true)
+        this._measureSlot(this._concreteInputs[slot.index], slot.index, true)
       }
     }
   }
@@ -4178,10 +4182,10 @@ export class LGraphNode
    * have been removed from the ecosystem.
    */
   _setConcreteSlots(): void {
-    this.#concreteInputs = this.inputs.map((slot) =>
+    this._concreteInputs = this.inputs.map((slot) =>
       toClass(NodeInputSlot, slot, this)
     )
-    this.#concreteOutputs = this.outputs.map((slot) =>
+    this._concreteOutputs = this.outputs.map((slot) =>
       toClass(NodeOutputSlot, slot, this)
     )
   }
@@ -4190,12 +4194,12 @@ export class LGraphNode
    * Arranges node elements in preparation for rendering (slots & widgets).
    */
   arrange(): void {
-    const slotsBounds = this.#measureSlots()
+    const slotsBounds = this._measureSlots()
     const widgetStartY = slotsBounds
       ? slotsBounds[1] + slotsBounds[3] - this.pos[1]
       : 0
-    this.#arrangeWidgets(widgetStartY)
-    this.#arrangeWidgetInputSlots()
+    this._arrangeWidgets(widgetStartY)
+    this._arrangeWidgetInputSlots()
   }
 
   /**

src/lib/litegraph/src/LGraphNodeProperties.ts

@@ -25,24 +25,24 @@ export class LGraphNodeProperties {
   node: LGraphNode
 
   /** Set of property paths that have been instrumented */
-  #instrumentedPaths = new Set<string>()
+  private _instrumentedPaths = new Set<string>()
 
   constructor(node: LGraphNode) {
     this.node = node
 
-    this.#setupInstrumentation()
+    this._setupInstrumentation()
   }
 
   /**
    * Sets up property instrumentation for all tracked properties
    */
-  #setupInstrumentation(): void {
+  private _setupInstrumentation(): void {
     for (const path of DEFAULT_TRACKED_PROPERTIES) {
-      this.#instrumentProperty(path)
+      this._instrumentProperty(path)
     }
   }
 
-  #resolveTargetObject(parts: string[]): {
+  private _resolveTargetObject(parts: string[]): {
     targetObject: Record<string, unknown>
     propertyName: string
   } {
@@ -73,14 +73,14 @@ export class LGraphNodeProperties {
   /**
    * Instruments a single property to track changes
    */
-  #instrumentProperty(path: string): void {
+  private _instrumentProperty(path: string): void {
     const parts = path.split('.')
 
     if (parts.length > 1) {
-      this.#ensureNestedPath(path)
+      this._ensureNestedPath(path)
     }
 
-    const { targetObject, propertyName } = this.#resolveTargetObject(parts)
+    const { targetObject, propertyName } = this._resolveTargetObject(parts)
 
     const hasProperty = Object.prototype.hasOwnProperty.call(
       targetObject,
@@ -96,7 +96,7 @@ export class LGraphNodeProperties {
         set: (newValue: unknown) => {
           const oldValue = value
           value = newValue
-          this.#emitPropertyChange(path, oldValue, newValue)
+          this._emitPropertyChange(path, oldValue, newValue)
 
           // Update enumerable: true for non-undefined values, false for undefined
           const shouldBeEnumerable = newValue !== undefined
@@ -121,24 +121,24 @@ export class LGraphNodeProperties {
       Object.defineProperty(
         targetObject,
         propertyName,
-        this.#createInstrumentedDescriptor(path, currentValue)
+        this._createInstrumentedDescriptor(path, currentValue)
       )
     }
 
-    this.#instrumentedPaths.add(path)
+    this._instrumentedPaths.add(path)
   }
 
   /**
    * Creates a property descriptor that emits change events
    */
-  #createInstrumentedDescriptor(
+  private _createInstrumentedDescriptor(
     propertyPath: string,
     initialValue: unknown
   ): PropertyDescriptor {
-    return this.#createInstrumentedDescriptorTyped(propertyPath, initialValue)
+    return this._createInstrumentedDescriptorTyped(propertyPath, initialValue)
   }
 
-  #createInstrumentedDescriptorTyped<TValue>(
+  private _createInstrumentedDescriptorTyped<TValue>(
     propertyPath: string,
     initialValue: TValue
   ): PropertyDescriptor {
@@ -149,7 +149,7 @@ export class LGraphNodeProperties {
       set: (newValue: TValue) => {
         const oldValue = value
         value = newValue
-        this.#emitPropertyChange(propertyPath, oldValue, newValue)
+        this._emitPropertyChange(propertyPath, oldValue, newValue)
       },
       enumerable: true,
       configurable: true
@@ -159,15 +159,15 @@ export class LGraphNodeProperties {
   /**
    * Emits a property change event if the node is connected to a graph
    */
-  #emitPropertyChange(
+  private _emitPropertyChange(
     propertyPath: string,
     oldValue: unknown,
     newValue: unknown
   ): void {
-    this.#emitPropertyChangeTyped(propertyPath, oldValue, newValue)
+    this._emitPropertyChangeTyped(propertyPath, oldValue, newValue)
   }
 
-  #emitPropertyChangeTyped<TValue>(
+  private _emitPropertyChangeTyped<TValue>(
     propertyPath: string,
     oldValue: TValue,
     newValue: TValue
@@ -183,7 +183,7 @@ export class LGraphNodeProperties {
   /**
    * Ensures parent objects exist for nested properties
    */
-  #ensureNestedPath(path: string): void {
+  private _ensureNestedPath(path: string): void {
     const parts = path.split('.')
     // LGraphNode supports dynamic property access at runtime
     let current: Record<string, unknown> = this.node as unknown as Record<
@@ -208,7 +208,7 @@ export class LGraphNodeProperties {
    * Checks if a property is being tracked
    */
   isTracked(path: string): boolean {
-    return this.#instrumentedPaths.has(path)
+    return this._instrumentedPaths.has(path)
   }
 
   /**

src/lib/litegraph/src/__snapshots__/LGraph.test.ts.snap

@@ -1,301 +1,43 @@
 // Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
 exports[`LGraph > supports schema v0.4 graphs > oldSchemaGraph 1`] = `
-LGraph {
-  "_groups": [
-    LGraphGroup {
-      "_bounding": Rectangle [
+{
+  "config": {},
+  "definitions": undefined,
+  "extra": {
+    "reroutes": undefined,
+  },
+  "floatingLinks": undefined,
+  "groups": [
+    {
+      "bounding": [
         20,
         20,
         1,
         3,
       ],
-      "_children": Set {},
-      "_nodes": [],
-      "_pos": Float64Array [
-        20,
-        20,
-      ],
-      "_size": Float64Array [
-        1,
-        3,
-      ],
       "color": "#6029aa",
       "flags": {},
-      "font": undefined,
       "font_size": 14,
-      "graph": [Circular],
       "id": 123,
-      "selected": undefined,
-      "setDirtyCanvas": [Function],
       "title": "A group to test with",
     },
   ],
-  "_input_nodes": undefined,
-  "_last_trigger_time": undefined,
-  "_links": Map {},
-  "_nodes": [
-    LGraphNode {
-      "_collapsed_width": undefined,
-      "_level": undefined,
-      "_pos": Float64Array [
-        10,
-        10,
-      ],
-      "_posSize": Rectangle [
-        10,
-        10,
-        140,
-        60,
-      ],
-      "_relative_id": undefined,
-      "_shape": undefined,
-      "_size": Float64Array [
-        140,
-        60,
-      ],
-      "action_call": undefined,
-      "action_triggered": undefined,
-      "badgePosition": "top-left",
-      "badges": [],
-      "bgcolor": undefined,
-      "block_delete": undefined,
-      "boxcolor": undefined,
-      "changeTracker": undefined,
-      "clip_area": undefined,
-      "clonable": undefined,
-      "color": undefined,
-      "console": undefined,
-      "exec_version": undefined,
-      "execute_triggered": undefined,
-      "flags": {},
-      "freeWidgetSpace": undefined,
-      "gotFocusAt": undefined,
-      "graph": [Circular],
-      "has_errors": true,
-      "id": 1,
-      "ignore_remove": undefined,
-      "inputs": [],
-      "last_serialization": {
-        "id": 1,
-      },
-      "locked": undefined,
-      "lostFocusAt": undefined,
-      "mode": 0,
-      "mouseOver": undefined,
-      "order": 0,
-      "outputs": [],
-      "progress": undefined,
-      "properties": {},
-      "properties_info": [],
-      "redraw_on_mouse": undefined,
-      "removable": undefined,
-      "resizable": undefined,
-      "selected": undefined,
-      "serialize_widgets": undefined,
-      "showAdvanced": undefined,
-      "strokeStyles": {
-        "error": [Function],
-        "selected": [Function],
-      },
-      "title": undefined,
-      "title_buttons": [],
-      "type": "",
-      "widgets": undefined,
-      "widgets_start_y": undefined,
-      "widgets_up": undefined,
-    },
-  ],
-  "_nodes_by_id": {
-    "1": LGraphNode {
-      "_collapsed_width": undefined,
-      "_level": undefined,
-      "_pos": Float64Array [
-        10,
-        10,
-      ],
-      "_posSize": Rectangle [
-        10,
-        10,
-        140,
-        60,
-      ],
-      "_relative_id": undefined,
-      "_shape": undefined,
-      "_size": Float64Array [
-        140,
-        60,
-      ],
-      "action_call": undefined,
-      "action_triggered": undefined,
-      "badgePosition": "top-left",
-      "badges": [],
-      "bgcolor": undefined,
-      "block_delete": undefined,
-      "boxcolor": undefined,
-      "changeTracker": undefined,
-      "clip_area": undefined,
-      "clonable": undefined,
-      "color": undefined,
-      "console": undefined,
-      "exec_version": undefined,
-      "execute_triggered": undefined,
-      "flags": {},
-      "freeWidgetSpace": undefined,
-      "gotFocusAt": undefined,
-      "graph": [Circular],
-      "has_errors": true,
-      "id": 1,
-      "ignore_remove": undefined,
-      "inputs": [],
-      "last_serialization": {
-        "id": 1,
-      },
-      "locked": undefined,
-      "lostFocusAt": undefined,
-      "mode": 0,
-      "mouseOver": undefined,
-      "order": 0,
-      "outputs": [],
-      "progress": undefined,
-      "properties": {},
-      "properties_info": [],
-      "redraw_on_mouse": undefined,
-      "removable": undefined,
-      "resizable": undefined,
-      "selected": undefined,
-      "serialize_widgets": undefined,
-      "showAdvanced": undefined,
-      "strokeStyles": {
-        "error": [Function],
-        "selected": [Function],
-      },
-      "title": undefined,
-      "title_buttons": [],
-      "type": "",
-      "widgets": undefined,
-      "widgets_start_y": undefined,
-      "widgets_up": undefined,
-    },
-  },
-  "_nodes_executable": [],
-  "_nodes_in_order": [
-    LGraphNode {
-      "_collapsed_width": undefined,
-      "_level": undefined,
-      "_pos": Float64Array [
-        10,
-        10,
-      ],
-      "_posSize": Rectangle [
-        10,
-        10,
-        140,
-        60,
-      ],
-      "_relative_id": undefined,
-      "_shape": undefined,
-      "_size": Float64Array [
-        140,
-        60,
-      ],
-      "action_call": undefined,
-      "action_triggered": undefined,
-      "badgePosition": "top-left",
-      "badges": [],
-      "bgcolor": undefined,
-      "block_delete": undefined,
-      "boxcolor": undefined,
-      "changeTracker": undefined,
-      "clip_area": undefined,
-      "clonable": undefined,
-      "color": undefined,
-      "console": undefined,
-      "exec_version": undefined,
-      "execute_triggered": undefined,
-      "flags": {},
-      "freeWidgetSpace": undefined,
-      "gotFocusAt": undefined,
-      "graph": [Circular],
-      "has_errors": true,
-      "id": 1,
-      "ignore_remove": undefined,
-      "inputs": [],
-      "last_serialization": {
-        "id": 1,
-      },
-      "locked": undefined,
-      "lostFocusAt": undefined,
-      "mode": 0,
-      "mouseOver": undefined,
-      "order": 0,
-      "outputs": [],
-      "progress": undefined,
-      "properties": {},
-      "properties_info": [],
-      "redraw_on_mouse": undefined,
-      "removable": undefined,
-      "resizable": undefined,
-      "selected": undefined,
-      "serialize_widgets": undefined,
-      "showAdvanced": undefined,
-      "strokeStyles": {
-        "error": [Function],
-        "selected": [Function],
-      },
-      "title": undefined,
-      "title_buttons": [],
-      "type": "",
-      "widgets": undefined,
-      "widgets_start_y": undefined,
-      "widgets_up": undefined,
-    },
-  ],
-  "_subgraphs": Map {},
-  "_version": 3,
-  "catch_errors": true,
-  "config": {},
-  "elapsed_time": 0.01,
-  "errors_in_execution": undefined,
-  "events": CustomEventTarget {
-    Symbol(listeners): {
-      "bubbling": Map {},
-      "capturing": Map {},
-    },
-    Symbol(listenerOptions): {
-      "bubbling": Map {},
-      "capturing": Map {},
-    },
-  },
-  "execution_time": undefined,
-  "execution_timer_id": undefined,
-  "extra": {},
-  "filter": undefined,
-  "fixedtime": 0,
-  "fixedtime_lapse": 0.01,
-  "floatingLinksInternal": Map {},
-  "globaltime": 0,
   "id": "b4e984f1-b421-4d24-b8b4-ff895793af13",
-  "iteration": 0,
-  "last_update_time": 0,
-  "links": Map {},
-  "list_of_graphcanvas": null,
-  "nodes_actioning": [],
-  "nodes_executedAction": [],
-  "nodes_executing": [],
-  "onTrigger": undefined,
-  "reroutesInternal": Map {},
+  "last_link_id": 0,
+  "last_node_id": 1,
+  "links": [],
+  "nodes": [
+    {
+      "id": 1,
+      "mode": 0,
+      "pos": [
+        10,
+        10,
+      ],
+    },
+  ],
   "revision": 0,
-  "runningtime": 0,
-  "starttime": 0,
-  "state": {
-    "lastGroupId": 123,
-    "lastLinkId": 0,
-    "lastNodeId": 1,
-    "lastRerouteId": 0,
-  },
-  "status": 1,
-  "vars": {},
   "version": 0.4,
 }
 `;

src/lib/litegraph/src/canvas/InputIndicators.ts

@@ -51,11 +51,11 @@ export class InputIndicators implements Disposable {
     const element = canvas.canvas
     const options = { capture: true, signal } satisfies AddEventListenerOptions
 
-    element.addEventListener('pointerdown', this.#onPointerDownOrMove, options)
-    element.addEventListener('pointermove', this.#onPointerDownOrMove, options)
-    element.addEventListener('pointerup', this.#onPointerUp, options)
-    element.addEventListener('keydown', this.#onKeyDownOrUp, options)
-    document.addEventListener('keyup', this.#onKeyDownOrUp, options)
+    element.addEventListener('pointerdown', this._onPointerDownOrMove, options)
+    element.addEventListener('pointermove', this._onPointerDownOrMove, options)
+    element.addEventListener('pointerup', this._onPointerUp, options)
+    element.addEventListener('keydown', this._onKeyDownOrUp, options)
+    document.addEventListener('keyup', this._onKeyDownOrUp, options)
 
     const origDrawFrontCanvas = canvas.drawFrontCanvas.bind(canvas)
     signal.addEventListener('abort', () => {
@@ -68,7 +68,7 @@ export class InputIndicators implements Disposable {
     }
   }
 
-  #onPointerDownOrMove = this.onPointerDownOrMove.bind(this)
+  private _onPointerDownOrMove = this.onPointerDownOrMove.bind(this)
   onPointerDownOrMove(e: MouseEvent): void {
     this.mouse0Down = (e.buttons & 1) === 1
     this.mouse1Down = (e.buttons & 4) === 4
@@ -80,14 +80,14 @@ export class InputIndicators implements Disposable {
     this.canvas.setDirty(true)
   }
 
-  #onPointerUp = this.onPointerUp.bind(this)
+  private _onPointerUp = this.onPointerUp.bind(this)
   onPointerUp(): void {
     this.mouse0Down = false
     this.mouse1Down = false
     this.mouse2Down = false
   }
 
-  #onKeyDownOrUp = this.onKeyDownOrUp.bind(this)
+  private _onKeyDownOrUp = this.onKeyDownOrUp.bind(this)
   onKeyDownOrUp(e: KeyboardEvent): void {
     this.ctrlDown = e.ctrlKey
     this.altDown = e.altKey

src/lib/litegraph/src/canvas/LinkConnector.ts

@@ -115,10 +115,10 @@ export class LinkConnector {
   /** The reroute beneath the pointer, if it is a valid connection target. */
   overReroute?: Reroute
 
-  readonly #setConnectingLinks: (value: ConnectingLink[]) => void
+  private readonly _setConnectingLinks: (value: ConnectingLink[]) => void
 
   constructor(setConnectingLinks: (value: ConnectingLink[]) => void) {
-    this.#setConnectingLinks = setConnectingLinks
+    this._setConnectingLinks = setConnectingLinks
   }
 
   get isConnecting() {
@@ -253,7 +253,7 @@ export class LinkConnector {
     state.connectingTo = 'input'
     state.draggingExistingLinks = true
 
-    this.#setLegacyLinks(false)
+    this._setLegacyLinks(false)
   }
 
   /** Drag all links from an output to a new output. */
@@ -364,7 +364,7 @@ export class LinkConnector {
     state.multi = true
     state.connectingTo = 'output'
 
-    this.#setLegacyLinks(true)
+    this._setLegacyLinks(true)
   }
 
   /**
@@ -387,7 +387,7 @@ export class LinkConnector {
 
     state.connectingTo = 'input'
 
-    this.#setLegacyLinks(false)
+    this._setLegacyLinks(false)
   }
 
   /**
@@ -410,7 +410,7 @@ export class LinkConnector {
 
     state.connectingTo = 'output'
 
-    this.#setLegacyLinks(true)
+    this._setLegacyLinks(true)
   }
 
   dragNewFromSubgraphInput(
@@ -431,7 +431,7 @@ export class LinkConnector {
 
     this.state.connectingTo = 'input'
 
-    this.#setLegacyLinks(false)
+    this._setLegacyLinks(false)
   }
 
   dragNewFromSubgraphOutput(
@@ -452,7 +452,7 @@ export class LinkConnector {
 
     this.state.connectingTo = 'output'
 
-    this.#setLegacyLinks(true)
+    this._setLegacyLinks(true)
   }
 
   /**
@@ -489,7 +489,7 @@ export class LinkConnector {
 
       this.state.connectingTo = 'input'
 
-      this.#setLegacyLinks(false)
+      this._setLegacyLinks(false)
       return
     }
 
@@ -516,7 +516,7 @@ export class LinkConnector {
 
     this.state.connectingTo = 'input'
 
-    this.#setLegacyLinks(false)
+    this._setLegacyLinks(false)
   }
 
   /**
@@ -553,7 +553,7 @@ export class LinkConnector {
 
       this.state.connectingTo = 'output'
 
-      this.#setLegacyLinks(false)
+      this._setLegacyLinks(false)
       return
     }
 
@@ -581,7 +581,7 @@ export class LinkConnector {
 
     this.state.connectingTo = 'output'
 
-    this.#setLegacyLinks(true)
+    this._setLegacyLinks(true)
   }
 
   dragFromLinkSegment(network: LinkNetwork, linkSegment: LinkSegment): void {
@@ -603,7 +603,7 @@ export class LinkConnector {
 
     state.connectingTo = 'input'
 
-    this.#setLegacyLinks(false)
+    this._setLegacyLinks(false)
   }
 
   /**
@@ -754,7 +754,7 @@ export class LinkConnector {
       const output = node.getOutputOnPos([canvasX, canvasY])
 
       if (output) {
-        this.#dropOnOutput(node, output)
+        this._dropOnOutput(node, output)
       } else {
         this.connectToNode(node, event)
       }
@@ -765,7 +765,7 @@ export class LinkConnector {
 
       // Input slot
       if (inputOrSocket) {
-        this.#dropOnInput(node, inputOrSocket)
+        this._dropOnInput(node, inputOrSocket)
       } else {
         // Node background / title
         this.connectToNode(node, event)
@@ -911,7 +911,7 @@ export class LinkConnector {
         return
       }
 
-      this.#dropOnOutput(node, output)
+      this._dropOnOutput(node, output)
     } else if (connectingTo === 'input') {
       // Dropping new input link
       const input = node.findInputByType(firstLink.fromSlot.type)?.slot
@@ -922,11 +922,11 @@ export class LinkConnector {
         return
       }
 
-      this.#dropOnInput(node, input)
+      this._dropOnInput(node, input)
     }
   }
 
-  #dropOnInput(node: LGraphNode, input: INodeInputSlot): void {
+  private _dropOnInput(node: LGraphNode, input: INodeInputSlot): void {
     for (const link of this.renderLinks) {
       if (!link.canConnectToInput(node, input)) continue
 
@@ -934,7 +934,7 @@ export class LinkConnector {
     }
   }
 
-  #dropOnOutput(node: LGraphNode, output: INodeOutputSlot): void {
+  private _dropOnOutput(node: LGraphNode, output: INodeOutputSlot): void {
     for (const link of this.renderLinks) {
       if (!link.canConnectToOutput(node, output)) {
         if (
@@ -1014,7 +1014,7 @@ export class LinkConnector {
   }
 
   /** Sets connecting_links, used by some extensions still. */
-  #setLegacyLinks(fromSlotIsInput: boolean): void {
+  private _setLegacyLinks(fromSlotIsInput: boolean): void {
     const links = this.renderLinks.map((link) => {
       const input = fromSlotIsInput ? (link.fromSlot as INodeInputSlot) : null
       const output = fromSlotIsInput ? null : (link.fromSlot as INodeOutputSlot)
@@ -1033,7 +1033,7 @@ export class LinkConnector {
         afterRerouteId
       } satisfies ConnectingLink
     })
-    this.#setConnectingLinks(links)
+    this._setConnectingLinks(links)
   }
 
   /**

src/lib/litegraph/src/infrastructure/ConstrainedSize.ts

@@ -10,10 +10,10 @@ import type { ReadOnlyRect, Size } from '@/lib/litegraph/src/interfaces'
  * - Width and height are then updated, clamped to min/max values
  */
 export class ConstrainedSize {
-  #width: number = 0
-  #height: number = 0
-  #desiredWidth: number = 0
-  #desiredHeight: number = 0
+  private _width: number = 0
+  private _height: number = 0
+  private _desiredWidth: number = 0
+  private _desiredHeight: number = 0
 
   minWidth: number = 0
   minHeight: number = 0
@@ -21,29 +21,29 @@ export class ConstrainedSize {
   maxHeight: number = Infinity
 
   get width() {
-    return this.#width
+    return this._width
   }
 
   get height() {
-    return this.#height
+    return this._height
   }
 
   get desiredWidth() {
-    return this.#desiredWidth
+    return this._desiredWidth
   }
 
   set desiredWidth(value: number) {
-    this.#desiredWidth = value
-    this.#width = clamp(value, this.minWidth, this.maxWidth)
+    this._desiredWidth = value
+    this._width = clamp(value, this.minWidth, this.maxWidth)
   }
 
   get desiredHeight() {
-    return this.#desiredHeight
+    return this._desiredHeight
   }
 
   set desiredHeight(value: number) {
-    this.#desiredHeight = value
-    this.#height = clamp(value, this.minHeight, this.maxHeight)
+    this._desiredHeight = value
+    this._height = clamp(value, this.minHeight, this.maxHeight)
   }
 
   constructor(width: number, height: number) {
@@ -70,6 +70,6 @@ export class ConstrainedSize {
   }
 
   toSize(): Size {
-    return [this.#width, this.#height]
+    return [this._width, this._height]
   }
 }

src/lib/litegraph/src/infrastructure/Rectangle.ts

@@ -19,8 +19,8 @@ import { isInRectangle } from '@/lib/litegraph/src/measure'
  * - {@link size}: The size of the rectangle.
  */
 export class Rectangle extends Float64Array {
-  #pos: Float64Array<ArrayBuffer> | undefined
-  #size: Float64Array<ArrayBuffer> | undefined
+  private _pos: Float64Array<ArrayBuffer> | undefined
+  private _size: Float64Array<ArrayBuffer> | undefined
 
   constructor(
     x: number = 0,
@@ -78,8 +78,8 @@ export class Rectangle extends Float64Array {
    * Updating the values of the returned object will update this rectangle.
    */
   get pos(): Point {
-    this.#pos ??= this.subarray(0, 2)
-    return this.#pos! as unknown as Point
+    this._pos ??= this.subarray(0, 2)
+    return this._pos! as unknown as Point
   }
 
   set pos(value: Readonly<Point>) {
@@ -93,8 +93,8 @@ export class Rectangle extends Float64Array {
    * Updating the values of the returned object will update this rectangle.
    */
   get size(): Size {
-    this.#size ??= this.subarray(2, 4)
-    return this.#size! as unknown as Size
+    this._size ??= this.subarray(2, 4)
+    return this._size! as unknown as Size
   }
 
   set size(value: Readonly<Size>) {

src/lib/litegraph/src/node/NodeInputSlot.ts

@@ -23,15 +23,15 @@ export class NodeInputSlot extends NodeSlot implements INodeInputSlot {
     return !!this.widget
   }
 
-  #widget: WeakRef<IBaseWidget> | undefined
+  private _widgetRef: WeakRef<IBaseWidget> | undefined
 
   /** Internal use only; API is not finalised and may change at any time. */
   get _widget(): IBaseWidget | undefined {
-    return this.#widget?.deref()
+    return this._widgetRef?.deref()
   }
 
   set _widget(widget: IBaseWidget | undefined) {
-    this.#widget = widget ? new WeakRef(widget) : undefined
+    this._widgetRef = widget ? new WeakRef(widget) : undefined
   }
 
   get collapsedPos(): Readonly<Point> {
@@ -79,4 +79,12 @@ export class NodeInputSlot extends NodeSlot implements INodeInputSlot {
 
     ctx.textAlign = textAlign
   }
+
+  override toJSON(): INodeInputSlot {
+    return {
+      ...super.toJSON(),
+      link: this.link,
+      widget: this.widget
+    }
+  }
 }

src/lib/litegraph/src/node/NodeOutputSlot.ts

@@ -15,8 +15,6 @@ import type { SubgraphOutput } from '@/lib/litegraph/src/subgraph/SubgraphOutput
 import { isSubgraphOutput } from '@/lib/litegraph/src/subgraph/subgraphUtils'
 
 export class NodeOutputSlot extends NodeSlot implements INodeOutputSlot {
-  #node: LGraphNode
-
   links: LinkId[] | null
   _data?: unknown
   slot_index?: number
@@ -27,7 +25,7 @@ export class NodeOutputSlot extends NodeSlot implements INodeOutputSlot {
 
   get collapsedPos(): Readonly<Point> {
     return [
-      this.#node._collapsed_width ?? LiteGraph.NODE_COLLAPSED_WIDTH,
+      this._node._collapsed_width ?? LiteGraph.NODE_COLLAPSED_WIDTH,
       LiteGraph.NODE_TITLE_HEIGHT * -0.5
     ]
   }
@@ -40,7 +38,6 @@ export class NodeOutputSlot extends NodeSlot implements INodeOutputSlot {
     this.links = slot.links
     this._data = slot._data
     this.slot_index = slot.slot_index
-    this.#node = node
   }
 
   override isValidTarget(
@@ -78,4 +75,12 @@ export class NodeOutputSlot extends NodeSlot implements INodeOutputSlot {
     ctx.textAlign = textAlign
     ctx.strokeStyle = strokeStyle
   }
+
+  override toJSON(): INodeOutputSlot {
+    return {
+      ...super.toJSON(),
+      links: this.links,
+      slot_index: this.slot_index
+    }
+  }
 }

src/lib/litegraph/src/node/NodeSlot.ts

@@ -37,7 +37,7 @@ export abstract class NodeSlot extends SlotBase implements INodeSlot {
   pos?: Point
 
   /** The offset from the parent node to the centre point of this slot. */
-  get #centreOffset(): Readonly<Point> {
+  private get _centreOffset(): Readonly<Point> {
     const nodePos = this.node.pos
     const { boundingRect } = this
 
@@ -55,9 +55,9 @@ export abstract class NodeSlot extends SlotBase implements INodeSlot {
   /** The center point of this slot when the node is collapsed. */
   abstract get collapsedPos(): Readonly<Point>
 
-  #node: LGraphNode
+  protected _node: LGraphNode
   get node(): LGraphNode {
-    return this.#node
+    return this._node
   }
 
   get highlightColor(): CanvasColour {
@@ -89,7 +89,7 @@ export abstract class NodeSlot extends SlotBase implements INodeSlot {
     super(name, type, rectangle)
 
     Object.assign(this, rest)
-    this.#node = node
+    this._node = node
   }
 
   /**
@@ -126,7 +126,7 @@ export abstract class NodeSlot extends SlotBase implements INodeSlot {
       ? this.highlightColor
       : LiteGraph.NODE_TEXT_COLOR
 
-    const pos = this.#centreOffset
+    const pos = this._centreOffset
     const slot_type = this.type
     const slot_shape = (
       slot_type === SlotType.Array ? SlotShape.Grid : this.shape
@@ -260,6 +260,25 @@ export abstract class NodeSlot extends SlotBase implements INodeSlot {
     ctx.lineWidth = originalLineWidth
   }
 
+  /**
+   * Custom JSON serialization to prevent circular reference errors.
+   * Returns only serializable slot properties without the node back-reference.
+   */
+  toJSON(): INodeSlot {
+    return {
+      name: this.name,
+      type: this.type,
+      label: this.label,
+      color_on: this.color_on,
+      color_off: this.color_off,
+      shape: this.shape,
+      dir: this.dir,
+      localized_name: this.localized_name,
+      pos: this.pos,
+      boundingRect: [...this.boundingRect] as [number, number, number, number]
+    }
+  }
+
   drawCollapsed(ctx: CanvasRenderingContext2D) {
     const [x, y] = this.collapsedPos
 

src/lib/litegraph/src/serialization.test.ts

@@ -0,0 +1,131 @@
+import { describe, expect, it } from 'vitest'
+
+import { LGraph, LGraphNode, LiteGraph } from './litegraph'
+import type { NodeInputSlot } from './node/NodeInputSlot'
+import type { NodeOutputSlot } from './node/NodeOutputSlot'
+
+class TestNode extends LGraphNode {
+  static override title = 'TestNode'
+  constructor() {
+    super('TestNode')
+  }
+}
+
+LiteGraph.registerNodeType('test/TestNode', TestNode)
+
+describe('Serialization - Circular Reference Prevention', () => {
+  describe('LGraph.toJSON()', () => {
+    it('should serialize without circular reference errors', () => {
+      const graph = new LGraph()
+
+      expect(() => JSON.stringify(graph)).not.toThrow()
+    })
+
+    it('should return serialize() output from toJSON()', () => {
+      const graph = new LGraph()
+      const serialized = graph.serialize()
+      const jsonOutput = graph.toJSON()
+
+      expect(jsonOutput).toEqual(serialized)
+    })
+
+    it('should not include list_of_graphcanvas in JSON output', () => {
+      const graph = new LGraph()
+      const json = JSON.stringify(graph)
+      const parsed = JSON.parse(json)
+
+      expect(parsed.list_of_graphcanvas).toBeUndefined()
+    })
+  })
+
+  describe('NodeSlot.toJSON()', () => {
+    it('NodeInputSlot should serialize without circular reference errors', () => {
+      const graph = new LGraph()
+      const node = LiteGraph.createNode('test/TestNode')!
+      graph.add(node)
+      node.addInput('test_input', 'TEST')
+
+      const inputSlot = node.inputs[0]
+
+      expect(() => JSON.stringify(inputSlot)).not.toThrow()
+    })
+
+    it('NodeOutputSlot should serialize without circular reference errors', () => {
+      const graph = new LGraph()
+      const node = LiteGraph.createNode('test/TestNode')!
+      graph.add(node)
+      node.addOutput('test_output', 'TEST')
+
+      const outputSlot = node.outputs[0]
+
+      expect(() => JSON.stringify(outputSlot)).not.toThrow()
+    })
+
+    it('NodeInputSlot.toJSON() should not include _node reference', () => {
+      const graph = new LGraph()
+      const node = LiteGraph.createNode('test/TestNode')!
+      graph.add(node)
+      node.addInput('test_input', 'TEST')
+
+      const inputSlot = node.inputs[0] as NodeInputSlot
+      const json = inputSlot.toJSON()
+
+      expect('_node' in json).toBe(false)
+      expect('node' in json).toBe(false)
+      expect(json.name).toBe('test_input')
+      expect(json.type).toBe('TEST')
+    })
+
+    it('NodeOutputSlot.toJSON() should not include _node reference', () => {
+      const graph = new LGraph()
+      const node = LiteGraph.createNode('test/TestNode')!
+      graph.add(node)
+      node.addOutput('test_output', 'TEST')
+
+      const outputSlot = node.outputs[0] as NodeOutputSlot
+      const json = outputSlot.toJSON()
+
+      expect('_node' in json).toBe(false)
+      expect('node' in json).toBe(false)
+      expect(json.name).toBe('test_output')
+      expect(json.type).toBe('TEST')
+    })
+  })
+
+  describe('Full graph with nodes - no circular references', () => {
+    it('should serialize a graph with connected nodes', () => {
+      const graph = new LGraph()
+
+      const node1 = LiteGraph.createNode('test/TestNode')!
+      const node2 = LiteGraph.createNode('test/TestNode')!
+      graph.add(node1)
+      graph.add(node2)
+
+      node1.addOutput('out', 'TEST')
+      node2.addInput('in', 'TEST')
+
+      node1.connect(0, node2, 0)
+
+      expect(() => JSON.stringify(graph)).not.toThrow()
+    })
+
+    it('should serialize graph.serialize() output without errors', () => {
+      const graph = new LGraph()
+
+      const node1 = LiteGraph.createNode('test/TestNode')!
+      const node2 = LiteGraph.createNode('test/TestNode')!
+      graph.add(node1)
+      graph.add(node2)
+
+      node1.addOutput('out', 'TEST')
+      node2.addInput('in', 'TEST')
+
+      node1.connect(0, node2, 0)
+
+      const serialized = graph.serialize()
+
+      expect(() => JSON.stringify(serialized)).not.toThrow()
+      expect(() => JSON.parse(JSON.stringify(serialized))).not.toThrow()
+    })
+  })
+})

src/lib/litegraph/src/subgraph/ExecutableNodeDTO.ts

@@ -50,7 +50,7 @@ export class ExecutableNodeDTO implements ExecutableLGraphNode {
   inputs: { linkId: number | null; name: string; type: ISlotType }[]
 
   /** Backing field for {@link id}. */
-  #id: ExecutionId
+  private _id: ExecutionId
 
   /**
    * The path to the actual node through subgraph instances, represented as a list of all subgraph node IDs (instances),
@@ -62,7 +62,7 @@ export class ExecutableNodeDTO implements ExecutableLGraphNode {
    * - `3` is the node ID of the actual node in the subgraph definition
    */
   get id() {
-    return this.#id
+    return this._id
   }
 
   get type() {
@@ -106,7 +106,7 @@ export class ExecutableNodeDTO implements ExecutableLGraphNode {
     if (!node.graph) throw new NullGraphError()
 
     // Set the internal ID of the DTO
-    this.#id = [...this.subgraphNodePath, this.node.id].join(':')
+    this._id = [...this.subgraphNodePath, this.node.id].join(':')
     this.graph = node.graph
     this.inputs = this.node.inputs.map((x) => ({
       linkId: x.link,
@@ -265,7 +265,7 @@ export class ExecutableNodeDTO implements ExecutableLGraphNode {
     // Upstreamed: Bypass nodes are bypassed using the first input with matching type
     if (this.mode === LGraphEventMode.BYPASS) {
       // Bypass nodes by finding first input with matching type
-      const matchingIndex = this.#getBypassSlotIndex(slot, type)
+      const matchingIndex = this._getBypassSlotIndex(slot, type)
 
       // No input types match - bypass not possible
       if (matchingIndex === -1) {
@@ -281,7 +281,7 @@ export class ExecutableNodeDTO implements ExecutableLGraphNode {
 
     const { node } = this
     if (node.isSubgraphNode())
-      return this.#resolveSubgraphOutput(slot, type, visited)
+      return this._resolveSubgraphOutput(slot, type, visited)
 
     if (node.isVirtualNode) {
       const virtualLink = this.node.getInputLink(slot)
@@ -321,7 +321,7 @@ export class ExecutableNodeDTO implements ExecutableLGraphNode {
    * @param type The type of the final target input (so type list matches are accurate)
    * @returns The index of the input slot on this node, otherwise `-1`.
    */
-  #getBypassSlotIndex(slot: number, type: ISlotType) {
+  private _getBypassSlotIndex(slot: number, type: ISlotType) {
     const { inputs } = this
     const oppositeInput = inputs[slot]
     const outputType = this.node.outputs[slot].type
@@ -358,7 +358,7 @@ export class ExecutableNodeDTO implements ExecutableLGraphNode {
    * @param visited A set of unique IDs to guard against infinite recursion. See {@link resolveInput}.
    * @returns A DTO for the node, and the origin ID / slot index of the output.
    */
-  #resolveSubgraphOutput(
+  private _resolveSubgraphOutput(
     slot: number,
     type: ISlotType,
     visited: Set<string>

src/lib/litegraph/src/subgraph/SubgraphIONodeBase.ts

@@ -38,12 +38,12 @@ export abstract class SubgraphIONodeBase<
   static minWidth = 100
   static roundedRadius = 10
 
-  readonly #boundingRect: Rectangle = new Rectangle()
+  private readonly _boundingRect: Rectangle = new Rectangle()
 
   abstract readonly id: NodeId
 
   get boundingRect(): Rectangle {
-    return this.#boundingRect
+    return this._boundingRect
   }
 
   selected: boolean = false
@@ -181,7 +181,7 @@ export abstract class SubgraphIONodeBase<
   ): void {
     // Only allow renaming non-empty slots
     if (slot !== this.emptySlot) {
-      this.#promptForSlotRename(slot, event)
+      this._promptForSlotRename(slot, event)
     }
   }
 
@@ -191,14 +191,14 @@ export abstract class SubgraphIONodeBase<
    * @param event The event that triggered the context menu.
    */
   protected showSlotContextMenu(slot: TSlot, event: CanvasPointerEvent): void {
-    const options: (IContextMenuValue | null)[] = this.#getSlotMenuOptions(slot)
+    const options: (IContextMenuValue | null)[] = this._getSlotMenuOptions(slot)
     if (!(options.length > 0)) return
 
     new LiteGraph.ContextMenu(options, {
       event,
       title: slot.name || 'Subgraph Output',
       callback: (item: IContextMenuValue) => {
-        this.#onSlotMenuAction(item, slot, event)
+        this._onSlotMenuAction(item, slot, event)
       }
     })
   }
@@ -208,7 +208,7 @@ export abstract class SubgraphIONodeBase<
    * @param slot The slot to get the context menu options for.
    * @returns The context menu options.
    */
-  #getSlotMenuOptions(slot: TSlot): (IContextMenuValue | null)[] {
+  private _getSlotMenuOptions(slot: TSlot): (IContextMenuValue | null)[] {
     const options: (IContextMenuValue | null)[] = []
 
     // Disconnect option if slot has connections
@@ -239,7 +239,7 @@ export abstract class SubgraphIONodeBase<
    * @param slot The slot
    * @param event The event that triggered the context menu.
    */
-  #onSlotMenuAction(
+  private _onSlotMenuAction(
     selectedItem: IContextMenuValue,
     slot: TSlot,
     event: CanvasPointerEvent
@@ -260,7 +260,7 @@ export abstract class SubgraphIONodeBase<
       // Rename the slot
       case 'rename':
         if (slot !== this.emptySlot) {
-          this.#promptForSlotRename(slot, event)
+          this._promptForSlotRename(slot, event)
         }
         break
     }
@@ -273,7 +273,7 @@ export abstract class SubgraphIONodeBase<
    * @param slot The slot to rename.
    * @param event The event that triggered the rename.
    */
-  #promptForSlotRename(slot: TSlot, event: CanvasPointerEvent): void {
+  private _promptForSlotRename(slot: TSlot, event: CanvasPointerEvent): void {
     this.subgraph.canvasAction((c) =>
       c.prompt(
         'Slot name',
@@ -362,7 +362,7 @@ export abstract class SubgraphIONodeBase<
   }
 
   configure(data: ExportedSubgraphIONode): void {
-    this.#boundingRect.set(data.bounding)
+    this._boundingRect.set(data.bounding)
     this.pinned = data.pinned ?? false
   }
 

src/lib/litegraph/src/subgraph/SubgraphNode.ts

@@ -63,7 +63,7 @@ export class SubgraphNode extends LGraphNode implements BaseLGraph {
   override widgets: IBaseWidget[] = []
 
   /** Manages lifecycle of all subgraph event listeners */
-  #eventAbortController = new AbortController()
+  private _eventAbortController = new AbortController()
 
   constructor(
     /** The (sub)graph that contains this subgraph instance. */
@@ -76,7 +76,7 @@ export class SubgraphNode extends LGraphNode implements BaseLGraph {
 
     // Update this node when the subgraph input / output slots are changed
     const subgraphEvents = this.subgraph.events
-    const { signal } = this.#eventAbortController
+    const { signal } = this._eventAbortController
 
     subgraphEvents.addEventListener(
       'input-added',
@@ -89,12 +89,12 @@ export class SubgraphNode extends LGraphNode implements BaseLGraph {
           const { inputNode, input } = subgraph.links[linkId].resolve(subgraph)
           const widget = inputNode?.widgets?.find?.((w) => w.name == name)
           if (widget)
-            this.#setWidget(subgraphInput, existingInput, widget, input?.widget)
+            this._setWidget(subgraphInput, existingInput, widget, input?.widget)
           return
         }
         const input = this.addInput(name, type)
 
-        this.#addSubgraphInputListeners(subgraphInput, input)
+        this._addSubgraphInputListeners(subgraphInput, input)
       },
       { signal }
     )
@@ -179,7 +179,7 @@ export class SubgraphNode extends LGraphNode implements BaseLGraph {
     }
   }
 
-  #addSubgraphInputListeners(
+  private _addSubgraphInputListeners(
     subgraphInput: SubgraphInput,
     input: INodeInputSlot & Partial<ISubgraphInput>
   ) {
@@ -201,7 +201,7 @@ export class SubgraphNode extends LGraphNode implements BaseLGraph {
         if (!widget) return
 
         const widgetLocator = e.detail.input.widget
-        this.#setWidget(subgraphInput, input, widget, widgetLocator)
+        this._setWidget(subgraphInput, input, widget, widgetLocator)
       },
       { signal }
     )
@@ -288,7 +288,7 @@ export class SubgraphNode extends LGraphNode implements BaseLGraph {
         continue
       }
 
-      this.#addSubgraphInputListeners(subgraphInput, input)
+      this._addSubgraphInputListeners(subgraphInput, input)
 
       // Find the first widget that this slot is connected to
       for (const linkId of subgraphInput.linkIds) {
@@ -318,13 +318,13 @@ export class SubgraphNode extends LGraphNode implements BaseLGraph {
         const widget = inputNode.getWidgetFromSlot(targetInput)
         if (!widget) continue
 
-        this.#setWidget(subgraphInput, input, widget, targetInput.widget)
+        this._setWidget(subgraphInput, input, widget, targetInput.widget)
         break
       }
     }
   }
 
-  #setWidget(
+  private _setWidget(
     subgraphInput: Readonly<SubgraphInput>,
     input: INodeInputSlot,
     widget: Readonly<IBaseWidget>,
@@ -553,7 +553,7 @@ export class SubgraphNode extends LGraphNode implements BaseLGraph {
 
   override onRemoved(): void {
     // Clean up all subgraph event listeners
-    this.#eventAbortController.abort()
+    this._eventAbortController.abort()
 
     // Clean up all promoted widgets
     for (const widget of this.widgets) {

src/lib/litegraph/src/widgets/BaseWidget.ts

@@ -57,10 +57,10 @@ export abstract class BaseWidget<
     maxWidth?: number
   }
 
-  #node: LGraphNode
+  private _node: LGraphNode
   /** The node that this widget belongs to. */
   get node() {
-    return this.#node
+    return this._node
   }
 
   linkedWidgets?: IBaseWidget[]
@@ -97,20 +97,20 @@ export abstract class BaseWidget<
     canvas: LGraphCanvas
   ): boolean
 
-  #value?: TWidget['value']
+  private _value?: TWidget['value']
   get value(): TWidget['value'] {
-    return this.#value
+    return this._value
   }
 
   set value(value: TWidget['value']) {
-    this.#value = value
+    this._value = value
   }
 
   constructor(widget: TWidget & { node: LGraphNode })
   constructor(widget: TWidget, node: LGraphNode)
   constructor(widget: TWidget & { node: LGraphNode }, node?: LGraphNode) {
     // Private fields
-    this.#node = node ?? widget.node
+    this._node = node ?? widget.node
 
     // The set and get functions for DOM widget values are hacked on to the options object;
     // attempting to set value before options will throw.

src/scripts/api.ts

@@ -294,7 +294,7 @@ export class PromptExecutionError extends Error {
 }
 
 export class ComfyApi extends EventTarget {
-  #registered = new Set()
+  private _registered = new Set()
   api_host: string
   api_base: string
   /**
@@ -451,7 +451,7 @@ export class ComfyApi extends EventTarget {
   ) {
     // Type assertion: strictFunctionTypes.  So long as we emit events in a type-safe fashion, this is safe.
     super.addEventListener(type, callback as EventListener, options)
-    this.#registered.add(type)
+    this._registered.add(type)
   }
 
   override removeEventListener<TEvent extends keyof ApiEvents>(
@@ -492,7 +492,7 @@ export class ComfyApi extends EventTarget {
   /**
    * Poll status  for colab and other things that don't support websockets.
    */
-  #pollQueue() {
+  private _pollQueue() {
     setInterval(async () => {
       try {
         const resp = await this.fetchApi('/prompt')
@@ -568,7 +568,7 @@ export class ComfyApi extends EventTarget {
     this.socket.addEventListener('error', () => {
       if (this.socket) this.socket.close()
       if (!isReconnect && !opened) {
-        this.#pollQueue()
+        this._pollQueue()
       }
     })
 
@@ -691,7 +691,7 @@ export class ComfyApi extends EventTarget {
               )
               break
             default:
-              if (this.#registered.has(msg.type)) {
+              if (this._registered.has(msg.type)) {
                 // Fallback for custom types - calls super direct.
                 super.dispatchEvent(
                   new CustomEvent(msg.type, { detail: msg.data })
@@ -956,7 +956,7 @@ export class ComfyApi extends EventTarget {
    * @param {*} type The endpoint to post to
    * @param {*} body Optional POST data
    */
-  async #postItem(type: string, body?: Record<string, unknown>) {
+  private async _postItem(type: string, body?: Record<string, unknown>) {
     try {
       await this.fetchApi('/' + type, {
         method: 'POST',
@@ -976,7 +976,7 @@ export class ComfyApi extends EventTarget {
    * @param {number} id The id of the item to delete
    */
   async deleteItem(type: string, id: string) {
-    await this.#postItem(type, { delete: [id] })
+    await this._postItem(type, { delete: [id] })
   }
 
   /**
@@ -984,7 +984,7 @@ export class ComfyApi extends EventTarget {
    * @param {string} type The type of list to clear, queue or history
    */
   async clearItems(type: string) {
-    await this.#postItem(type, { clear: true })
+    await this._postItem(type, { clear: true })
   }
 
   /**
@@ -993,7 +993,7 @@ export class ComfyApi extends EventTarget {
    * @param {string | null} [runningPromptId] Optional Running Prompt ID to interrupt
    */
   async interrupt(runningPromptId: string | null) {
-    await this.#postItem(
+    await this._postItem(
       'interrupt',
       runningPromptId ? { prompt_id: runningPromptId } : undefined
     )

src/scripts/ui.ts

@@ -241,17 +241,17 @@ function dragElement(dragEl): () => void {
 }
 
 class ComfyList {
-  #type
-  #text
-  #reverse
+  private _type
+  private _text
+  private _reverse
   element: HTMLDivElement
   button?: HTMLButtonElement
 
   // @ts-expect-error fixme ts strict error
   constructor(text, type?, reverse?) {
-    this.#text = text
-    this.#type = type || text.toLowerCase()
-    this.#reverse = reverse || false
+    this._text = text
+    this._type = type || text.toLowerCase()
+    this._reverse = reverse || false
     this.element = $el('div.comfy-list') as HTMLDivElement
     this.element.style.display = 'none'
   }
@@ -261,7 +261,7 @@ class ComfyList {
   }
 
   async load() {
-    const items = await api.getItems(this.#type)
+    const items = await api.getItems(this._type)
     this.element.replaceChildren(
       ...Object.keys(items).flatMap((section) => [
         $el('h4', {
@@ -269,12 +269,12 @@ class ComfyList {
         }),
         $el('div.comfy-list-items', [
           // @ts-expect-error fixme ts strict error
-          ...(this.#reverse ? items[section].reverse() : items[section]).map(
+          ...(this._reverse ? items[section].reverse() : items[section]).map(
             (item: LegacyQueueItem) => {
               // Allow items to specify a custom remove action (e.g. for interrupt current prompt)
               const removeAction = item.remove ?? {
                 name: 'Delete',
-                cb: () => api.deleteItem(this.#type, item.prompt[1])
+                cb: () => api.deleteItem(this._type, item.prompt[1])
               }
               return $el('div', { textContent: item.prompt[0] + ': ' }, [
                 $el('button', {
@@ -311,9 +311,9 @@ class ComfyList {
       ]),
       $el('div.comfy-list-actions', [
         $el('button', {
-          textContent: 'Clear ' + this.#text,
+          textContent: 'Clear ' + this._text,
           onclick: async () => {
-            await api.clearItems(this.#type)
+            await api.clearItems(this._type)
             await this.load()
           }
         }),
@@ -339,7 +339,7 @@ class ComfyList {
   hide() {
     this.element.style.display = 'none'
     // @ts-expect-error fixme ts strict error
-    this.button.textContent = 'View ' + this.#text
+    this.button.textContent = 'View ' + this._text
   }
 
   toggle() {

src/scripts/ui/components/asyncDialog.ts

@@ -6,7 +6,7 @@ type DialogAction<T> = string | { value?: T; text: string }
 export class ComfyAsyncDialog<
   T = string | null
 > extends ComfyDialog<HTMLDialogElement> {
-  #resolve: (value: T | null) => void = () => {}
+  private _resolve: (value: T | null) => void = () => {}
 
   constructor(actions?: Array<DialogAction<T>>) {
     super(
@@ -30,7 +30,7 @@ export class ComfyAsyncDialog<
     super.show(html)
 
     return new Promise((resolve) => {
-      this.#resolve = resolve
+      this._resolve = resolve
     })
   }
 
@@ -43,12 +43,12 @@ export class ComfyAsyncDialog<
     this.element.showModal()
 
     return new Promise((resolve) => {
-      this.#resolve = resolve
+      this._resolve = resolve
     })
   }
 
   override close(result: T | null = null) {
-    this.#resolve(result)
+    this._resolve(result)
     this.element.close()
     super.close()
   }

src/scripts/ui/components/button.ts

@@ -21,8 +21,8 @@ type ComfyButtonProps = {
 }
 
 export class ComfyButton implements ComfyComponent<HTMLElement> {
-  #over = 0
-  #popupOpen = false
+  private _over = 0
+  private _popupOpen = false
   isOver = false
   iconElement = $el('i.mdi')
   contentElement = $el('span')
@@ -123,7 +123,7 @@ export class ComfyButton implements ComfyComponent<HTMLElement> {
     this.element.addEventListener('click', (e) => {
       if (this.popup) {
         // we are either a touch device or triggered by click not hover
-        if (!this.#over) {
+        if (!this._over) {
           this.popup.toggle()
         }
       }
@@ -157,7 +157,7 @@ export class ComfyButton implements ComfyComponent<HTMLElement> {
       internalClasses.push('disabled')
     }
     if (this.popup) {
-      if (this.#popupOpen) {
+      if (this._popupOpen) {
         internalClasses.push('popup-open')
       } else {
         internalClasses.push('popup-closed')
@@ -172,16 +172,16 @@ export class ComfyButton implements ComfyComponent<HTMLElement> {
     if (mode === 'hover') {
       for (const el of [this.element, this.popup.element]) {
         el.addEventListener('mouseenter', () => {
-          this.popup.open = !!++this.#over
+          this.popup.open = !!++this._over
         })
         el.addEventListener('mouseleave', () => {
-          this.popup.open = !!--this.#over
+          this.popup.open = !!--this._over
         })
       }
     }
 
     popup.addEventListener('change', () => {
-      this.#popupOpen = popup.open
+      this._popupOpen = popup.open
       this.updateClasses()
     })
 

src/scripts/ui/components/popup.ts

@@ -54,9 +54,9 @@ export class ComfyPopup extends EventTarget {
     this.open = prop(this, 'open', false, (v, o) => {
       if (v === o) return
       if (v) {
-        this.#show()
+        this._show()
       } else {
-        this.#hide()
+        this._hide()
       }
     })
   }
@@ -65,24 +65,24 @@ export class ComfyPopup extends EventTarget {
     this.open = !this.open
   }
 
-  #hide() {
+  private _hide() {
     this.element.classList.remove('open')
     window.removeEventListener('resize', this.update)
-    window.removeEventListener('click', this.#clickHandler, { capture: true })
-    window.removeEventListener('keydown', this.#escHandler, { capture: true })
+    window.removeEventListener('click', this._clickHandler, { capture: true })
+    window.removeEventListener('keydown', this._escHandler, { capture: true })
 
     this.dispatchEvent(new CustomEvent('close'))
     this.dispatchEvent(new CustomEvent('change'))
   }
 
-  #show() {
+  private _show() {
     this.element.classList.add('open')
     this.update()
 
     window.addEventListener('resize', this.update)
-    window.addEventListener('click', this.#clickHandler, { capture: true })
+    window.addEventListener('click', this._clickHandler, { capture: true })
     if (this.closeOnEscape) {
-      window.addEventListener('keydown', this.#escHandler, { capture: true })
+      window.addEventListener('keydown', this._escHandler, { capture: true })
     }
 
     this.dispatchEvent(new CustomEvent('open'))
@@ -90,7 +90,7 @@ export class ComfyPopup extends EventTarget {
   }
 
   // @ts-expect-error fixme ts strict error
-  #escHandler = (e) => {
+  private _escHandler = (e) => {
     if (e.key === 'Escape') {
       this.open = false
       e.preventDefault()
@@ -99,7 +99,7 @@ export class ComfyPopup extends EventTarget {
   }
 
   // @ts-expect-error fixme ts strict error
-  #clickHandler = (e) => {
+  private _clickHandler = (e) => {
     /** @type {any} */
     const target = e.target
     if (

src/scripts/ui/dialog.ts

@@ -5,11 +5,11 @@ export class ComfyDialog<
 > extends EventTarget {
   element: T
   textElement!: HTMLElement
-  #buttons: HTMLButtonElement[] | null
+  private _buttons: HTMLButtonElement[] | null
 
   constructor(type = 'div', buttons: HTMLButtonElement[] | null = null) {
     super()
-    this.#buttons = buttons
+    this._buttons = buttons
     this.element = $el(type + '.comfy-modal', { parent: document.body }, [
       $el('div.comfy-modal-content', [
         $el('p', { $: (p) => (this.textElement = p) }),
@@ -20,7 +20,7 @@ export class ComfyDialog<
 
   createButtons() {
     return (
-      this.#buttons ?? [
+      this._buttons ?? [
         $el('button', {
           type: 'button',
           textContent: 'Close',

src/utils/migration/migrateReroute.ts

@@ -54,7 +54,7 @@ class ConversionContext {
   /** Reroutes that has at least a valid link pass through it */
   validReroutes: Set<Reroute>
 
-  #rerouteIdCounter = 0
+  private _rerouteIdCounter = 0
 
   constructor(public workflow: WorkflowJSON04) {
     this.nodeById = _.keyBy(workflow.nodes.map(_.cloneDeep), 'id')
@@ -76,7 +76,7 @@ class ConversionContext {
       pos: getNodeCenter(node),
       linkIds: []
     }))
-    this.#rerouteIdCounter = reroutes.length + 1
+    this._rerouteIdCounter = reroutes.length + 1
 
     this.rerouteByNodeId = _.keyBy(reroutes, 'nodeId')
     this.rerouteById = _.keyBy(reroutes, 'id')
@@ -88,7 +88,7 @@ class ConversionContext {
   /**
    * Gets the chain of reroute nodes leading to the given node
    */
-  #getRerouteChain(node: RerouteNode): RerouteNode[] {
+  private _getRerouteChain(node: RerouteNode): RerouteNode[] {
     const nodes: RerouteNode[] = []
     let currentNode: RerouteNode = node
     while (currentNode?.type === 'Reroute') {
@@ -106,7 +106,7 @@ class ConversionContext {
     return nodes
   }
 
-  #connectRerouteChain(rerouteNodes: RerouteNode[]): Reroute[] {
+  private _connectRerouteChain(rerouteNodes: RerouteNode[]): Reroute[] {
     const reroutes = rerouteNodes.map((node) => this.rerouteByNodeId[node.id])
     for (const reroute of reroutes) {
       this.validReroutes.add(reroute)
@@ -121,7 +121,7 @@ class ConversionContext {
     return reroutes
   }
 
-  #createNewLink(
+  private _createNewLink(
     startingLink: ComfyLinkObject,
     endingLink: ComfyLinkObject,
     rerouteNodes: RerouteNode[]
@@ -136,7 +136,7 @@ class ConversionContext {
       parentId: reroute.id
     })
 
-    const reroutes = this.#connectRerouteChain(rerouteNodes)
+    const reroutes = this._connectRerouteChain(rerouteNodes)
     for (const reroute of reroutes) {
       reroute.linkIds ??= []
       reroute.linkIds.push(endingLink.id)
@@ -153,11 +153,11 @@ class ConversionContext {
     }
   }
 
-  #createNewInputFloatingLink(
+  private _createNewInputFloatingLink(
     endingLink: ComfyLinkObject,
     rerouteNodes: RerouteNode[]
   ): ComfyLinkObject {
-    const reroutes = this.#connectRerouteChain(rerouteNodes)
+    const reroutes = this._connectRerouteChain(rerouteNodes)
     for (const reroute of reroutes) {
       if (!reroute.linkIds?.length) {
         reroute.floating = {
@@ -166,7 +166,7 @@ class ConversionContext {
       }
     }
     return {
-      id: this.#rerouteIdCounter++,
+      id: this._rerouteIdCounter++,
       origin_id: -1,
       origin_slot: -1,
       target_id: endingLink.target_id,
@@ -176,11 +176,11 @@ class ConversionContext {
     }
   }
 
-  #createNewOutputFloatingLink(
+  private _createNewOutputFloatingLink(
     startingLink: ComfyLinkObject,
     rerouteNodes: RerouteNode[]
   ): ComfyLinkObject {
-    const reroutes = this.#connectRerouteChain(rerouteNodes)
+    const reroutes = this._connectRerouteChain(rerouteNodes)
     for (const reroute of reroutes) {
       if (!reroute.linkIds?.length) {
         reroute.floating = {
@@ -190,7 +190,7 @@ class ConversionContext {
     }
 
     return {
-      id: this.#rerouteIdCounter++,
+      id: this._rerouteIdCounter++,
       origin_id: startingLink.origin_id,
       origin_slot: startingLink.origin_slot,
       target_id: -1,
@@ -200,7 +200,7 @@ class ConversionContext {
     }
   }
 
-  #reconnectLinks(nodes: ComfyNode[], links: ComfyLinkObject[]): void {
+  private _reconnectLinks(nodes: ComfyNode[], links: ComfyLinkObject[]): void {
     // Remove all existing links on sockets
     for (const node of nodes) {
       for (const input of node.inputs ?? []) {
@@ -245,18 +245,18 @@ class ConversionContext {
       const endingRerouteNode = this.nodeById[
         endingLink.origin_id
       ] as RerouteNode
-      const rerouteNodes = this.#getRerouteChain(endingRerouteNode)
+      const rerouteNodes = this._getRerouteChain(endingRerouteNode)
       const startingLink =
         this.linkById[
           rerouteNodes[rerouteNodes.length - 1]?.inputs?.[0]?.link ?? -1
         ]
       if (startingLink) {
         // Valid link found, create a new link
-        links.push(this.#createNewLink(startingLink, endingLink, rerouteNodes))
+        links.push(this._createNewLink(startingLink, endingLink, rerouteNodes))
       } else {
         // Floating link found, create a new floating link
         floatingLinks.push(
-          this.#createNewInputFloatingLink(endingLink, rerouteNodes)
+          this._createNewInputFloatingLink(endingLink, rerouteNodes)
         )
       }
     }
@@ -270,14 +270,14 @@ class ConversionContext {
       })
 
     for (const rerouteNode of floatingEndingRerouteNodes) {
-      const rerouteNodes = this.#getRerouteChain(rerouteNode)
+      const rerouteNodes = this._getRerouteChain(rerouteNode)
       const startingLink =
         this.linkById[
           rerouteNodes[rerouteNodes.length - 1]?.inputs?.[0]?.link ?? -1
         ]
       if (startingLink) {
         floatingLinks.push(
-          this.#createNewOutputFloatingLink(startingLink, rerouteNodes)
+          this._createNewOutputFloatingLink(startingLink, rerouteNodes)
         )
       }
     }
@@ -285,7 +285,7 @@ class ConversionContext {
     const nodes = Object.values(this.nodeById).filter(
       (node) => node.type !== 'Reroute'
     )
-    this.#reconnectLinks(nodes, links)
+    this._reconnectLinks(nodes, links)
 
     return {
       ...this.workflow,