refactor(internals): use non enumerable props

src/components/ConnectionLine/index.tsx

@@ -6,6 +6,7 @@ import { getBezierPath } from '../Edges/BezierEdge';
 import { getSmoothStepPath } from '../Edges/SmoothStepEdge';
 import { ConnectionLineType, ConnectionLineComponent, HandleType, Node, ReactFlowState, Position } from '../../types';
 import { getSimpleBezierPath } from '../Edges/SimpleBezierEdge';
+import { handleBoundsSymbol } from '../../utils';
 
 interface ConnectionLineProps {
   connectionNodeId: string;
@@ -37,12 +38,13 @@ export default ({
 
   const { nodeInternals, transform } = useStore(selector, shallow);
   const fromNode = useRef<Node | undefined>(nodeInternals.get(nodeId));
+  const fromHandleBounds = fromNode.current?.[handleBoundsSymbol];
 
-  if (!fromNode.current || !isConnectable || !fromNode.current.handleBounds?.[connectionHandleType]) {
+  if (!fromNode.current || !isConnectable || !fromHandleBounds?.[connectionHandleType]) {
     return null;
   }
 
-  const handleBound = fromNode.current.handleBounds?.[connectionHandleType];
+  const handleBound = fromHandleBounds[connectionHandleType];
   const fromHandle = handleId ? handleBound?.find((d) => d.id === handleId) : handleBound?.[0];
   const fromHandleX = fromHandle ? fromHandle.x + fromHandle.width / 2 : (fromNode.current?.width ?? 0) / 2;
   const fromHandleY = fromHandle ? fromHandle.y + fromHandle.height / 2 : fromNode.current?.height ?? 0;

src/container/EdgeRenderer/utils.ts

@@ -13,7 +13,7 @@ import {
   Transform,
   XYPosition,
 } from '../../types';
-import { rectToBox } from '../../utils';
+import { handleBoundsSymbol, rectToBox } from '../../utils';
 
 export type CreateEdgeTypes = (edgeTypes: EdgeTypes) => EdgeTypesWrapped;
 
@@ -168,10 +168,11 @@ export function isEdgeVisible({
 
 export function getNodeData(nodeInternals: NodeInternals, nodeId: string): [Rect, NodeHandleBounds | null, boolean] {
   const node = nodeInternals.get(nodeId);
-  const handleBounds = node?.handleBounds;
+  const handleBounds = node?.[handleBoundsSymbol] || null;
+
   const isInvalid =
     !node ||
-    !node.handleBounds ||
+    !handleBounds ||
     !node.width ||
     !node.height ||
     typeof node.positionAbsolute?.x === 'undefined' ||
@@ -184,7 +185,7 @@ export function getNodeData(nodeInternals: NodeInternals, nodeId: string): [Rect
       width: node?.width || 0,
       height: node?.height || 0,
     },
-    handleBounds || null,
+    handleBounds,
     !isInvalid,
   ];
 }

src/container/NodeRenderer/index.tsx

@@ -11,6 +11,7 @@ import {
   ReactFlowState,
   WrapNodeProps,
 } from '../../types';
+import { isParentSymbol, zSymbol } from '../../utils';
 
 interface NodeRendererProps {
   nodeTypes: NodeTypesWrapped;
@@ -117,8 +118,8 @@ const NodeRenderer = (props: NodeRendererProps) => {
             isConnectable={isConnectable}
             resizeObserver={resizeObserver}
             dragHandle={node.dragHandle}
-            zIndex={node.z ?? 0}
-            isParent={!!node.isParent}
+            zIndex={node[zSymbol] ?? 0}
+            isParent={!!node[isParentSymbol]}
             noDragClassName={props.noDragClassName}
             noPanClassName={props.noPanClassName}
           />

src/hooks/useVisibleEdges.ts

@@ -3,7 +3,7 @@ import { useCallback } from 'react';
 import { useStore } from '../store';
 import { isEdgeVisible } from '../container/EdgeRenderer/utils';
 import { ReactFlowState, NodeInternals, Edge } from '../types';
-import { isNumeric } from '../utils';
+import { isNumeric, zSymbol } from '../utils';
 
 const defaultEdgeTree = [{ level: 0, isMaxLevel: true, edges: [] }];
 
@@ -17,7 +17,7 @@ function groupEdgesByZLevel(edges: Edge[], nodeInternals: NodeInternals, elevate
     if (elevateEdgesOnSelect) {
       z = hasZIndex
         ? edge.zIndex!
-        : Math.max(nodeInternals.get(edge.source)?.z || 0, nodeInternals.get(edge.target)?.z || 0);
+        : Math.max(nodeInternals.get(edge.source)?.[zSymbol] || 0, nodeInternals.get(edge.target)?.[zSymbol] || 0);
     }
 
     if (tree[z]) {

src/store/index.ts

@@ -1,7 +1,7 @@
 import create from 'zustand';
 import createContext from 'zustand/context';
 
-import { clampPosition, getDimensions } from '../utils';
+import { clampPosition, getDimensions, handleBoundsSymbol } from '../utils';
 import { applyNodeChanges } from '../utils/changes';
 import {
   ReactFlowState,
@@ -60,7 +60,7 @@ const createStore = () =>
             const handleBounds = getHandleBounds(update.nodeElement, transform[2]);
             nodeInternals.set(node.id, {
               ...node,
-              handleBounds,
+              [handleBoundsSymbol]: handleBounds,
               ...dimensions,
             });
 

src/store/utils.ts

@@ -1,7 +1,7 @@
 import { zoomIdentity } from 'd3-zoom';
 import { GetState, SetState } from 'zustand';
 
-import { isNumeric } from '../utils';
+import { handleBoundsSymbol, isNumeric, isParentSymbol, zSymbol } from '../utils';
 import { getD3Transition, getRectOfNodes, getTransformForBounds } from '../utils/graph';
 import {
   Edge,
@@ -30,7 +30,7 @@ function calculateXYZPosition(
   return calculateXYZPosition(parentNode, nodeInternals, parentNodes, {
     x: (result.x ?? 0) + (parentNode.position?.x ?? 0),
     y: (result.y ?? 0) + (parentNode.position?.y ?? 0),
-    z: (parentNode.z ?? 0) > (result.z ?? 0) ? parentNode.z ?? 0 : result.z ?? 0,
+    z: (parentNode[zSymbol] ?? 0) > (result.z ?? 0) ? parentNode[zSymbol] ?? 0 : result.z ?? 0,
   });
 }
 
@@ -45,18 +45,28 @@ export function createNodeInternals(nodes: Node[], nodeInternals: NodeInternals)
     const internals: Node = {
       width: currInternals?.width,
       height: currInternals?.height,
-      handleBounds: currInternals?.handleBounds,
       ...node,
       positionAbsolute: {
         x: node.position.x,
         y: node.position.y,
       },
-      z,
     };
+
     if (node.parentNode) {
       internals.parentNode = node.parentNode;
       parentNodes[node.parentNode] = true;
     }
+
+    Object.defineProperty(internals, handleBoundsSymbol, {
+      enumerable: false,
+      value: currInternals?.[handleBoundsSymbol],
+    });
+
+    Object.defineProperty(internals, zSymbol, {
+      enumerable: false,
+      value: z,
+    });
+
     nextNodeInternals.set(node.id, internals);
   });
 
@@ -68,18 +78,18 @@ export function createNodeInternals(nodes: Node[], nodeInternals: NodeInternals)
     if (node.parentNode || parentNodes[node.id]) {
       const { x, y, z } = calculateXYZPosition(node, nextNodeInternals, parentNodes, {
         ...node.position,
-        z: node.z ?? 0,
+        z: node[zSymbol] ?? 0,
       });
 
       node.positionAbsolute = {
         x,
         y,
       };
 
-      node.z = z;
+      node[zSymbol] = z;
 
       if (parentNodes[node.id]) {
-        node.isParent = true;
+        node[isParentSymbol] = true;
       }
     }
   });

src/types/nodes.ts

@@ -2,6 +2,7 @@ import { CSSProperties, MouseEvent as ReactMouseEvent } from 'react';
 
 import { XYPosition, Position, CoordinateExtent } from './utils';
 import { HandleElement } from './handles';
+import { handleBoundsSymbol, isParentSymbol, zSymbol } from '../utils';
 
 // interface for the user node items
 export interface Node<T = any> {
@@ -28,9 +29,9 @@ export interface Node<T = any> {
 
   // only used internally
   positionAbsolute?: XYPosition;
-  z?: number;
-  handleBounds?: NodeHandleBounds;
-  isParent?: boolean;
+  [zSymbol]?: number;
+  [handleBoundsSymbol]?: NodeHandleBounds;
+  [isParentSymbol]?: boolean;
 }
 
 // props that get passed to a custom node

src/utils/index.ts

@@ -40,3 +40,7 @@ export const getBoundsofRects = (rect1: Rect, rect2: Rect): Rect =>
   boxToRect(getBoundsOfBoxes(rectToBox(rect1), rectToBox(rect2)));
 
 export const isNumeric = (n: any): n is number => !isNaN(n) && isFinite(n);
+
+export const handleBoundsSymbol = Symbol('handleBound');
+export const zSymbol = Symbol('z');
+export const isParentSymbol = Symbol('isParent');