Support top-layer <dialog> recording & replay

.changeset/happy-carrots-hide.md

@@ -0,0 +1,5 @@
+---
+"rrweb-snapshot": minor
+---
+
+Record dialog's modal status for replay in rrweb. (Currently triggering `dialog.showModal()` is not supported in rrweb-snapshot's rebuild)

.changeset/silly-knives-chew.md

@@ -0,0 +1,7 @@
+---
+"rrdom": minor
+"rrweb": minor
+"@rrweb/types": minor
+---
+
+Support top-layer <dialog> components. Fixes #1381.

.github/workflows/ci-cd.yml

@@ -38,5 +38,5 @@ jobs:
         if: failure()
         with:
           name: image-diff
-          path: packages/rrweb/test/*/__image_snapshots__/__diff_output__/*.png
+          path: packages/**/__image_snapshots__/__diff_output__/*.png
           if-no-files-found: ignore

README.md

@@ -62,7 +62,7 @@ Since we want the record and replay sides to share a strongly typed data structu
 
 1. Fork this repository.
 2. Run `yarn install` in the root to install required dependencies for all sub-packages (note: `npm install` is _not_ recommended).
-3. Run `yarn dev` in the root to get auto-building for all the sub-packages whenever you modify anything.
+3. Run `yarn build:all` to build all packages and get a stable base, then `yarn dev` in the root to get auto-building for all the sub-packages whenever you modify anything.
 4. Navigate to one of the sub-packages (in the `packages` folder) where you'd like to make a change.
 5. Patch the code and run `yarn test` to run the tests, make sure they pass before you commit anything. Add test cases in order to avoid future regression.
 6. If tests are failing, but the change in output is desirable, run `yarn test:update` and carefully commit the changes in test output.

packages/rrdom/package.json

@@ -46,6 +46,7 @@
     "@typescript-eslint/eslint-plugin": "^5.23.0",
     "@typescript-eslint/parser": "^5.23.0",
     "eslint": "^8.15.0",
+    "happy-dom": "^14.12.0",
     "puppeteer": "^17.1.3",
     "typescript": "^5.4.5",
     "vite": "^5.3.1",

packages/rrdom/src/diff.ts

@@ -21,6 +21,7 @@ import type {
 } from './document';
 import type {
   RRCanvasElement,
+  RRDialogElement,
   RRElement,
   RRIFrameElement,
   RRMediaElement,
@@ -285,6 +286,29 @@ function diffAfterUpdatingChildren(
             );
           break;
         }
+        case 'DIALOG': {
+          const dialog = oldElement as HTMLDialogElement;
+          const rrDialog = newRRElement as unknown as RRDialogElement;
+          const wasOpen = dialog.open;
+          const wasModal = dialog.matches('dialog:modal');
+          const shouldBeOpen = rrDialog.open;
+          const shouldBeModal = rrDialog.isModal;
+
+          const modalChanged = wasModal !== shouldBeModal;
+          const openChanged = wasOpen !== shouldBeOpen;
+
+          if (modalChanged || (wasOpen && openChanged)) dialog.close();
+          if (shouldBeOpen && (openChanged || modalChanged)) {
+            try {
+              if (shouldBeModal) dialog.showModal();
+              else dialog.show();
+            } catch (e) {
+              console.warn(e);
+            }
+          }
+
+          break;
+        }
       }
       break;
     }
@@ -335,7 +359,6 @@ function diffProps(
 
   for (const { name } of Array.from(oldAttributes))
     if (!(name in newAttributes)) oldTree.removeAttribute(name);
-
   newTree.scrollLeft && (oldTree.scrollLeft = newTree.scrollLeft);
   newTree.scrollTop && (oldTree.scrollTop = newTree.scrollTop);
 }

packages/rrdom/src/document.ts

@@ -474,7 +474,8 @@ export class BaseRRElement extends BaseRRNode implements IRRElement {
   }
 
   public getAttribute(name: string): string | null {
-    return this.attributes[name] || null;
+    if (this.attributes[name] === undefined) return null;
+    return this.attributes[name];
   }
 
   public setAttribute(name: string, attribute: string) {
@@ -547,6 +548,30 @@ export class BaseRRMediaElement extends BaseRRElement {
   }
 }
 
+export class BaseRRDialogElement extends BaseRRElement {
+  public readonly tagName = 'DIALOG' as const;
+  public readonly nodeName = 'DIALOG' as const;
+
+  get isModal() {
+    return this.getAttribute('rr_open_mode') === 'modal';
+  }
+  get open() {
+    return this.getAttribute('open') !== null;
+  }
+  public close() {
+    this.removeAttribute('open');
+    this.removeAttribute('rr_open_mode');
+  }
+  public show() {
+    this.setAttribute('open', '');
+    this.setAttribute('rr_open_mode', 'non-modal');
+  }
+  public showModal() {
+    this.setAttribute('open', '');
+    this.setAttribute('rr_open_mode', 'modal');
+  }
+}
+
 export class BaseRRText extends BaseRRNode implements IRRText {
   public readonly nodeType: number = NodeType.TEXT_NODE;
   public readonly nodeName = '#text' as const;

packages/rrdom/src/index.ts

@@ -31,6 +31,7 @@ import {
   type IRRDocumentType,
   type IRRText,
   type IRRComment,
+  BaseRRDialogElement,
 } from './document';
 
 export class RRDocument extends BaseRRDocument {
@@ -104,6 +105,9 @@ export class RRDocument extends BaseRRDocument {
       case 'STYLE':
         element = new RRStyleElement(upperTagName);
         break;
+      case 'DIALOG':
+        element = new RRDialogElement(upperTagName);
+        break;
       default:
         element = new RRElement(upperTagName);
         break;
@@ -151,6 +155,8 @@ export class RRElement extends BaseRRElement {
 
 export class RRMediaElement extends BaseRRMediaElement {}
 
+export class RRDialogElement extends BaseRRDialogElement {}
+
 export class RRCanvasElement extends RRElement implements IRRElement {
   public rr_dataURL: string | null = null;
   public canvasMutations: {

packages/rrdom/test/diff/dialog.test.ts

@@ -0,0 +1,112 @@
+/**
+ * @vitest-environment happy-dom
+ */
+import { vi, MockInstance } from 'vitest';
+import {
+  NodeType as RRNodeType,
+  createMirror,
+  Mirror as NodeMirror,
+  serializedNodeWithId,
+} from 'rrweb-snapshot';
+import { RRDocument } from '../../src';
+import { diff, ReplayerHandler } from '../../src/diff';
+
+describe('diff algorithm for rrdom', () => {
+  let mirror: NodeMirror;
+  let replayer: ReplayerHandler;
+  let warn: MockInstance;
+  let elementSn: serializedNodeWithId;
+  let elementSn2: serializedNodeWithId;
+
+  beforeEach(() => {
+    mirror = createMirror();
+    replayer = {
+      mirror,
+      applyCanvas: () => {},
+      applyInput: () => {},
+      applyScroll: () => {},
+      applyStyleSheetMutation: () => {},
+      afterAppend: () => {},
+    };
+    document.write('<!DOCTYPE html><html><head></head><body></body></html>');
+    // Mock the original console.warn function to make the test fail once console.warn is called.
+    warn = vi.spyOn(console, 'warn');
+
+    elementSn = {
+      type: RRNodeType.Element,
+      tagName: 'DIALOG',
+      attributes: {},
+      childNodes: [],
+      id: 1,
+    };
+
+    elementSn2 = {
+      ...elementSn,
+      attributes: {},
+    };
+  });
+
+  afterEach(() => {
+    // Check that warn was not called (fail on warning)
+    expect(warn).not.toBeCalled();
+    vi.resetAllMocks();
+  });
+  describe('diff dialog elements', () => {
+    vi.setConfig({ testTimeout: 60_000 });
+
+    it('should trigger `showModal` on rr_open_mode:modal attributes', () => {
+      const tagName = 'DIALOG';
+      const node = document.createElement(tagName) as HTMLDialogElement;
+      vi.spyOn(node, 'matches').mockReturnValue(false); // matches is used to check if the dialog was opened with showModal
+      const showModalFn = vi.spyOn(node, 'showModal');
+
+      const rrDocument = new RRDocument();
+      const rrNode = rrDocument.createElement(tagName);
+      rrNode.attributes = { rr_open_mode: 'modal', open: '' };
+
+      mirror.add(node, elementSn);
+      rrDocument.mirror.add(rrNode, elementSn);
+      diff(node, rrNode, replayer);
+
+      expect(showModalFn).toBeCalled();
+    });
+
+    it('should trigger `close` on rr_open_mode removed', () => {
+      const tagName = 'DIALOG';
+      const node = document.createElement(tagName) as HTMLDialogElement;
+      node.showModal();
+      vi.spyOn(node, 'matches').mockReturnValue(true); // matches is used to check if the dialog was opened with showModal
+      const closeFn = vi.spyOn(node, 'close');
+
+      const rrDocument = new RRDocument();
+      const rrNode = rrDocument.createElement(tagName);
+      rrNode.attributes = {};
+
+      mirror.add(node, elementSn);
+      rrDocument.mirror.add(rrNode, elementSn);
+      diff(node, rrNode, replayer);
+
+      expect(closeFn).toBeCalled();
+    });
+
+    it('should not trigger `close` on rr_open_mode is kept', () => {
+      const tagName = 'DIALOG';
+      const node = document.createElement(tagName) as HTMLDialogElement;
+      vi.spyOn(node, 'matches').mockReturnValue(true); // matches is used to check if the dialog was opened with showModal
+      node.setAttribute('rr_open_mode', 'modal');
+      node.setAttribute('open', '');
+      const closeFn = vi.spyOn(node, 'close');
+
+      const rrDocument = new RRDocument();
+      const rrNode = rrDocument.createElement(tagName);
+      rrNode.attributes = { rr_open_mode: 'modal', open: '' };
+
+      mirror.add(node, elementSn);
+      rrDocument.mirror.add(rrNode, elementSn);
+      diff(node, rrNode, replayer);
+
+      expect(closeFn).not.toBeCalled();
+      expect(node.open).toBe(true);
+    });
+  });
+});

packages/rrweb-snapshot/src/rebuild.ts

@@ -287,6 +287,11 @@ function buildNode(
           (node as HTMLMediaElement).loop = value;
         } else if (name === 'rr_mediaVolume' && typeof value === 'number') {
           (node as HTMLMediaElement).volume = value;
+        } else if (name === 'rr_open_mode') {
+          (node as HTMLDialogElement).setAttribute(
+            'rr_open_mode',
+            value as string,
+          ); // keep this attribute for rrweb to trigger showModal
         }
       }
 

packages/rrweb-snapshot/src/snapshot.ts

@@ -6,6 +6,7 @@
   type MaskInputOptions,
   type SlimDOMOptions,
   type DataURLOptions,
+  type DialogAttributes,
   type MaskTextFn,
   type MaskInputFn,
   type KeepIframeSrcFn,
@@ -514,7 +515,7 @@
         // So we'll be conservative and keep textContent as-is.
       } else if ((n.parentNode as HTMLStyleElement).sheet?.cssRules) {
         textContent = stringifyStylesheet(
           (n.parentNode as HTMLStyleElement).sheet!,
         );
       }
     } catch (err) {
@@ -652,6 +653,16 @@
       delete attributes.selected;
     }
   }
+
+  if (tagName === 'dialog' && (n as HTMLDialogElement).open) {
+    // register what type of dialog is this
+    // `modal` or `non-modal`
+    // this is used to trigger `showModal()` or `show()` on replay (outside of rrweb-snapshot, in rrweb)
+    (attributes as DialogAttributes).rr_open_mode = n.matches('dialog:modal')
+      ? 'modal'
+      : 'non-modal';
+  }
+
   // canvas image data
   if (tagName === 'canvas' && recordCanvas) {
     if ((n as ICanvas).__context === '2d') {
@@ -697,10 +708,10 @@
     const recordInlineImage = () => {
       image.removeEventListener('load', recordInlineImage);
       try {
         canvasService!.width = image.naturalWidth;
         canvasService!.height = image.naturalHeight;
         canvasCtx!.drawImage(image, 0, 0);
         attributes.rr_dataURL = canvasService!.toDataURL(
           dataURLOptions.type,
           dataURLOptions.quality,
         );

packages/rrweb-snapshot/src/types.ts

@@ -103,6 +103,23 @@ export type mediaAttributes = {
   rr_mediaVolume?: number;
 };
 
+export type DialogAttributes = {
+  open: string;
+  /**
+   * Represents the dialog's open mode.
+   * `modal` means the dialog is opened with `showModal()`.
+   * `non-modal` means the dialog is opened with `show()` or
+   * by adding an `open` attribute.
+   */
+  rr_open_mode: 'modal' | 'non-modal';
+  /**
+   * Currently unimplemented, but in future can be used to:
+   * Represents the order of which of the dialog was opened.
+   * This is useful for replaying the dialog `.showModal()` in the correct order.
+   */
+  // rr_open_mode_index?: number;
+};
+
 // @deprecated
 export interface INode extends Node {
   __sn: serializedNodeWithId;