Trying to run HelloWorld...

packages/core/src/util/ObjectIdentity.ts

@@ -44,7 +44,8 @@ class ObjectIdentity {
   /**
    * Returns the ID for the given object or function.
    */
-  static get(obj: IdentityObject | IdentityFunction) {
+  static get(obj: IdentityObject | IdentityFunction | null) {
+    if (obj) {
       if (isNullish(obj[FIELD_NAME])) {
         if (typeof obj === 'object') {
           const ctor = getFunctionName(obj.constructor);
@@ -57,6 +58,9 @@ class ObjectIdentity {
       return obj[FIELD_NAME] as string;
     }
 
+    return null;
+  }
+
   /**
    * Deletes the ID from the given object or function.
    */

packages/core/src/util/canvas/SvgCanvas2D.ts

@@ -26,6 +26,7 @@ import {
   FONT_STRIKETHROUGH,
   FONT_UNDERLINE,
   LINE_HEIGHT,
+  NONE,
   NS_SVG,
   NS_XLINK,
   WORD_WRAP,
@@ -666,37 +667,37 @@ class SvgCanvas2D extends AbstractCanvas2D {
     const { node } = this;
     const s = this.state;
 
-    if (node != null) {
+    if (node) {
       if (node.nodeName === 'path') {
         // Checks if the path is not empty
-        if (this.path != null && this.path.length > 0) {
+        if (this.path && this.path.length > 0) {
           node.setAttribute('d', this.path.join(' '));
         } else {
           return;
         }
       }
 
-      if (filled && s.fillColor != null) {
+      if (filled && s.fillColor !== NONE) {
         this.updateFill();
       } else if (!this.styleEnabled) {
         // Workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=814952
         if (node.nodeName === 'ellipse' && mxClient.IS_FF) {
           node.setAttribute('fill', 'transparent');
         } else {
-          node.setAttribute('fill', 'none');
+          node.setAttribute('fill', NONE);
         }
 
         // Sets the actual filled state for stroke tolerance
         filled = false;
       }
 
-      if (stroked && s.strokeColor != null) {
+      if (stroked && s.strokeColor !== NONE) {
         this.updateStroke();
       } else if (!this.styleEnabled) {
-        node.setAttribute('stroke', 'none');
+        node.setAttribute('stroke', NONE);
       }
 
-      if (s.transform != null && s.transform.length > 0) {
+      if (s.transform && s.transform.length > 0) {
         node.setAttribute('transform', s.transform);
       }
 
@@ -714,8 +715,8 @@ class SvgCanvas2D extends AbstractCanvas2D {
         node.setAttribute('pointer-events', this.pointerEventsValue);
       }
       // Enables clicks for nodes inside a link element
-      else if (!this.pointerEvents && this.originalRoot == null) {
+      else if (!this.pointerEvents && !this.originalRoot) {
-        node.setAttribute('pointer-events', 'none');
+        node.setAttribute('pointer-events', NONE);
       }
 
       // Removes invisible nodes from output if they don't handle events
@@ -723,10 +724,10 @@ class SvgCanvas2D extends AbstractCanvas2D {
         (node.nodeName !== 'rect' &&
           node.nodeName !== 'path' &&
           node.nodeName !== 'ellipse') ||
-        (node.getAttribute('fill') !== 'none' &&
+        (node.getAttribute('fill') !== NONE &&
           node.getAttribute('fill') !== 'transparent') ||
-        node.getAttribute('stroke') !== 'none' ||
+        node.getAttribute('stroke') !== NONE ||
-        node.getAttribute('pointer-events') !== 'none'
+        node.getAttribute('pointer-events') !== NONE
       ) {
         // LATER: Update existing DOM for performance
         this.root.appendChild(node);
@@ -748,8 +749,8 @@ class SvgCanvas2D extends AbstractCanvas2D {
       this.node.setAttribute('fill-opacity', String(s.alpha * s.fillAlpha));
     }
 
-    if (s.fillColor) {
+    if (s.fillColor !== NONE) {
-      if (s.gradientColor) {
+      if (s.gradientColor !== NONE) {
         const id = this.getSvgGradient(
           s.fillColor,
           s.gradientColor,
@@ -790,7 +791,8 @@ class SvgCanvas2D extends AbstractCanvas2D {
 
     const s = this.state;
 
-    if (s.strokeColor) this.node.setAttribute('stroke', s.strokeColor.toLowerCase());
+    if (s.strokeColor !== NONE)
+      this.node.setAttribute('stroke', s.strokeColor.toLowerCase());
 
     if (s.alpha < 1 || s.strokeAlpha < 1) {
       this.node.setAttribute('stroke-opacity', String(s.alpha * s.strokeAlpha));
@@ -894,10 +896,10 @@ class SvgCanvas2D extends AbstractCanvas2D {
       shadow.getAttribute('fill') !== 'none' &&
       (!mxClient.IS_FF || shadow.getAttribute('fill') !== 'transparent')
     ) {
-      shadow.setAttribute('fill', String(s.shadowColor));
+      shadow.setAttribute('fill', s.shadowColor);
     }
 
-    if (shadow.getAttribute('stroke') !== 'none' && s.shadowColor) {
+    if (shadow.getAttribute('stroke') !== 'none' && s.shadowColor !== NONE) {
       shadow.setAttribute('stroke', s.shadowColor);
     }
 
@@ -1725,7 +1727,7 @@ class SvgCanvas2D extends AbstractCanvas2D {
   updateFont(node: SVGElement) {
     const s = this.state;
 
-    if (s.fontColor) node.setAttribute('fill', s.fontColor);
+    if (s.fontColor !== NONE) node.setAttribute('fill', s.fontColor);
 
     if (!this.styleEnabled || s.fontFamily !== DEFAULT_FONTFAMILY) {
       node.setAttribute('font-family', s.fontFamily);

packages/core/src/view/cell/CellMarker.ts

@@ -287,7 +287,7 @@ class CellMarker extends EventSource {
     if (state !== this.markedState || color !== this.currentColor) {
       this.currentColor = color;
 
-      if (state && this.currentColor) {
+      if (state && this.currentColor !== NONE) {
         this.markedState = state;
         this.mark();
       } else if (this.markedState) {

packages/core/src/view/cell/CellRenderer.ts

@@ -359,7 +359,6 @@ class CellRenderer {
 
       if (value === 'inherit') {
         referenced = state.cell.getParent();
-        /* disable swimlane for now
       } else if (value === 'swimlane') {
         // @ts-ignore
         shape[field] =
@@ -371,9 +370,8 @@ class CellRenderer {
           referenced = state.cell;
         }
 
-        referenced = graph.swimlane.getSwimlane(<Cell>referenced);
+        referenced = graph.getSwimlane(<Cell>referenced);
-        key = graph.swimlane.swimlaneIndicatorColorAttribute;
+        key = graph.swimlaneIndicatorColorAttribute;
-        */
       } else if (value === 'indicated' && state.shape) {
         // @ts-ignore
         shape[field] = state.shape.indicatorColor;
@@ -437,7 +435,7 @@ class CellRenderer {
       state.text = new this.defaultTextShape(
         value,
         new Rectangle(),
-        state.style.align || ALIGN_CENTER,
+        state.style.align ?? ALIGN_CENTER,
         state.getVerticalAlign(),
         state.style.fontColor,
         state.style.fontFamily,
@@ -455,9 +453,9 @@ class CellRenderer {
         graph.isLabelClipped(state.cell),
         state.style.overflow,
         state.style.labelPadding,
-        state.style.textDirection || DEFAULT_TEXT_DIRECTION
+        state.style.textDirection ?? DEFAULT_TEXT_DIRECTION
       );
-      state.text.opacity = state.style.textOpacity;
+      state.text.opacity = state.style.textOpacity ?? 100;
       state.text.dialect = isForceHtml ? DIALECT_STRICTHTML : state.view.graph.dialect;
       state.text.style = state.style;
       state.text.state = state;
@@ -928,7 +926,7 @@ class CellRenderer {
     const isForceHtml =
       state.view.graph.isHtmlLabel(state.cell) || (value && isNode(value));
     const dialect = isForceHtml ? DIALECT_STRICTHTML : state.view.graph.dialect;
-    const overflow = state.style.overflow || 'visible';
+    const overflow = state.style.overflow ?? 'visible';
 
     if (
       state.text &&

packages/core/src/view/cell/GraphCellsMixin.ts

@@ -1409,7 +1409,7 @@ const GraphCellsMixin: PartialType = {
           this.getModel().setStyle(cell, cellStyle);
         } else {*/
         const state = this.getView().createState(cell);
-        const align = state.style.align || ALIGN_CENTER;
+        const align = state.style.align ?? ALIGN_CENTER;
 
         if (align === ALIGN_RIGHT) {
           geo.x += geo.width - size.width;
@@ -2377,7 +2377,7 @@ const GraphCellsMixin: PartialType = {
           const state = this.getView().getState(cell);
 
           if (state && cell.isVisible() && (!ignoreFn || !ignoreFn(state))) {
-            const deg = state.style.rotation;
+            const deg = state.style.rotation ?? 0;
 
             let box: CellState | Rectangle = state; // TODO: CHECK ME!!!! ==========================================================
             if (deg !== 0) {
@@ -2486,7 +2486,7 @@ const GraphCellsMixin: PartialType = {
         pt = next;
       }
     } else {
-      const alpha = toRadians(state.style.rotation);
+      const alpha = toRadians(state.style.rotation ?? 0);
 
       if (alpha !== 0) {
         const cos = Math.cos(-alpha);

packages/core/src/view/cell/datatypes/CellState.ts

@@ -12,7 +12,7 @@ import GraphView from '../../view/GraphView';
 import Shape from '../../geometry/shape/Shape';
 import TextShape from '../../geometry/shape/node/TextShape';
 import Dictionary from '../../../util/Dictionary';
-import { NONE } from '../../../util/Constants';
+import { ALIGN_MIDDLE, NONE } from '../../../util/Constants';
 import { CellStateStyles } from '../../../types';
 import RectangleShape from '../../geometry/shape/node/RectangleShape';
 import CellOverlay from '../CellOverlay';
@@ -466,7 +466,7 @@ class CellState extends Rectangle {
    * returned.
    */
   getVerticalAlign() {
-    return this.style.verticalAlign;
+    return this.style.verticalAlign ?? ALIGN_MIDDLE;
   }
 
   /**
@@ -477,8 +477,8 @@ class CellState extends Rectangle {
   isTransparentState() {
     let result = false;
 
-    const stroke = this.style.strokeColor;
+    const stroke = this.style.strokeColor ?? NONE;
-    const fill = this.style.fillColor;
+    const fill = this.style.fillColor ?? NONE;
 
     result = stroke === NONE && fill === NONE && !this.getImageSrc();
 

packages/core/src/view/cell/vertex/VertexHandler.ts

@@ -1046,7 +1046,7 @@ class VertexHandler {
    */
   resizeVertex(me: InternalMouseEvent) {
     const ct = new Point(this.state.getCenterX(), this.state.getCenterY());
-    const alpha = toRadians(this.state.style.rotation);
+    const alpha = toRadians(this.state.style.rotation ?? 0);
     const point = new Point(me.getGraphX(), me.getGraphY());
     const tr = this.graph.view.translate;
     const { scale } = this.graph.view;
@@ -1334,7 +1334,7 @@ class VertexHandler {
           }
         } else if (index === InternalEvent.ROTATION_HANDLE) {
           if (this.currentAlpha != null) {
-            const delta = this.currentAlpha - (this.state.style.rotation || 0);
+            const delta = this.currentAlpha - (this.state.style.rotation ?? 0);
 
             if (delta !== 0) {
               this.rotateCell(this.state.cell, delta);
@@ -1344,7 +1344,7 @@ class VertexHandler {
           }
         } else {
           const gridEnabled = this.graph.isGridEnabledEvent(me.getEvent());
-          const alpha = toRadians(this.state.style.rotation);
+          const alpha = toRadians(this.state.style.rotation ?? 0);
           const cos = Math.cos(-alpha);
           const sin = Math.sin(-alpha);
 
@@ -1523,7 +1523,7 @@ class VertexHandler {
 
     if (geo && this.labelShape && this.labelShape.bounds) {
       if (index === InternalEvent.LABEL_HANDLE) {
-        const alpha = -toRadians(this.state.style.rotation);
+        const alpha = -toRadians(this.state.style.rotation ?? 0);
         const cos = Math.cos(alpha);
         const sin = Math.sin(alpha);
         const { scale } = this.graph.view;
@@ -1923,7 +1923,7 @@ class VertexHandler {
             'w-resize',
           ];
 
-          const alpha = toRadians(this.state.style.rotation);
+          const alpha = toRadians(this.state.style.rotation ?? 0);
           const cos = Math.cos(alpha);
           const sin = Math.sin(alpha);
           const da = Math.round((alpha * 4) / Math.PI);

packages/core/src/view/connection/ConstraintHandler.ts

@@ -76,7 +76,7 @@ class ConstraintHandler {
 
   focusIcons: ImageShape[] = [];
 
-  constraints: ConnectionConstraint[] = [];
+  constraints: ConnectionConstraint[] | null = null;
 
   currentConstraint: ConnectionConstraint | null = null;
 
@@ -275,6 +275,7 @@ class ConstraintHandler {
         2 * tol,
         2 * tol
       );
+
       const state = this.graph.view.getState(this.getCellForEvent(me, point) as Cell);
 
       // Keeps focus icons visible while over vertex bounds and no other cell under mouse or shift is pressed
@@ -396,16 +397,16 @@ class ConstraintHandler {
    * the handler is not enabled then the outline is painted, but the constraints
    * are ignored.
    */
-  setFocus(me: InternalMouseEvent, state: CellState, source: boolean) {
+  setFocus(me: InternalMouseEvent, state: CellState | null, source: boolean) {
     this.constraints =
-      state != null && !this.isStateIgnored(state, source) && state.cell.isConnectable()
+      state && !this.isStateIgnored(state, source) && state.cell.isConnectable()
         ? this.isEnabled()
-          ? this.graph.getAllConnectionConstraints(state, source) || []
+          ? this.graph.getAllConnectionConstraints(state, source) ?? []
           : []
-        : [];
+        : null;
 
     // Only uses cells which have constraints
-    if (this.constraints != null) {
+    if (this.constraints && state) {
       this.currentFocus = state;
       this.currentFocusArea = new Rectangle(state.x, state.y, state.width, state.height);
 

packages/core/src/view/selection/CellHighlight.ts

@@ -186,8 +186,7 @@ class CellHighlight {
     if (this.state != null && this.shape != null) {
       this.shape.scale = this.state.view.scale;
 
-      // @ts-ignore
+      if (this.state.cell.isEdge()) {
-      if (this.graph.model.isEdge(this.state.cell)) {
         this.shape.strokeWidth = this.getStrokeWidth();
         this.shape.points = this.state.absolutePoints;
         this.shape.outline = false;

packages/html/.storybook/preview.js

@@ -1,21 +1,22 @@
+import '@maxgraph/css/common.css';
 
 export const parameters = {
-  actions: { argTypesRegex: "^on[A-Z].*" },
+  actions: { argTypesRegex: '^on[A-Z].*' },
   controls: {
     matchers: {
       color: /(background|color)$/i,
       date: /Date$/,
     },
   },
-}
+};
 
 export const globalTypes = {
   width: {
     type: 'number',
-    defaultValue: 800
+    defaultValue: 800,
   },
   height: {
     type: 'number',
-    defaultValue: 600
+    defaultValue: 600,
-  }
+  },
 };

packages/html/stories/HelloWorld.stories.js

@@ -1,4 +1,5 @@
 import { Graph, InternalEvent, RubberBand } from '@maxgraph/core';
+
 import { globalTypes } from '../.storybook/preview';
 
 export default {

packages/html/webpack.config.js

@@ -6,6 +6,7 @@ module.exports = merge(base, {
   resolve: {
     alias: {
       '@maxgraph/core': path.resolve(__dirname, '../core/src'),
+      '@maxgraph/css': path.resolve(__dirname, '../core/css'),
     },
   },
 });