Fix: Trigger mouse movement & hover with mouse up/down in sync mode

.changeset/sixty-impalas-laugh.md

@@ -0,0 +1,5 @@
+---
+'rrweb': patch
+---
+
+Only apply touch-active styling on flush

.changeset/violet-zebras-cry.md

@@ -0,0 +1,5 @@
+---
+'rrweb': patch
+---
+
+Trigger mouse movement and hover with mouse up and mouse down events when replayer.pause(...) is called.

packages/rrweb/src/replay/index.ts

@@ -148,6 +148,7 @@ export class Replayer {
 
   private mousePos: mouseMovePos | null = null;
   private touchActive: boolean | null = null;
+  private lastMouseDownEvent: [Node, Event] | null = null;
 
   // Keep the rootNode of the last hovered element. So  when hovering a new element, we can remove the last hovered element's :hover style.
   private lastHoveredRootNode: Document | ShadowRoot;
@@ -299,6 +300,20 @@ export class Replayer {
         );
         this.mousePos = null;
       }
+
+      if (this.touchActive === true) {
+        this.mouse.classList.add('touch-active');
+      } else if (this.touchActive === false) {
+        this.mouse.classList.remove('touch-active');
+      }
+      this.touchActive = null;
+
+      if (this.lastMouseDownEvent) {
+        const [target, event] = this.lastMouseDownEvent;
+        target.dispatchEvent(event);
+      }
+      this.lastMouseDownEvent = null;
+
       if (this.lastSelectionData) {
         this.applySelection(this.lastSelectionData);
         this.lastSelectionData = null;
@@ -614,12 +629,6 @@ export class Replayer {
       const castFn = this.getCastFn(event, true);
       castFn();
     }
-    if (this.touchActive === true) {
-      this.mouse.classList.add('touch-active');
-    } else if (this.touchActive === false) {
-      this.mouse.classList.remove('touch-active');
-    }
-    this.touchActive = null;
   };
 
   private getCastFn = (event: eventWithTime, isSync = false) => {
@@ -1108,7 +1117,7 @@ export class Replayer {
         /**
          * Same as the situation of missing input target.
          */
-        if (d.id === -1 || isSync) {
+        if (d.id === -1) {
           break;
         }
         const event = new Event(MouseInteractions[d.type].toLowerCase());
@@ -1137,12 +1146,19 @@ export class Replayer {
           case MouseInteractions.Click:
           case MouseInteractions.TouchStart:
           case MouseInteractions.TouchEnd:
+          case MouseInteractions.MouseDown:
+          case MouseInteractions.MouseUp:
             if (isSync) {
               if (d.type === MouseInteractions.TouchStart) {
                 this.touchActive = true;
               } else if (d.type === MouseInteractions.TouchEnd) {
                 this.touchActive = false;
               }
+              if (d.type === MouseInteractions.MouseDown) {
+                this.lastMouseDownEvent = [target, event];
+              } else if (d.type === MouseInteractions.MouseUp) {
+                this.lastMouseDownEvent = null;
+              }
               this.mousePos = {
                 x: d.x,
                 y: d.y,
@@ -1172,6 +1188,9 @@ export class Replayer {
                 this.mouse.classList.add('touch-active');
               } else if (d.type === MouseInteractions.TouchEnd) {
                 this.mouse.classList.remove('touch-active');
+              } else {
+                // for MouseDown & MouseUp also invoke default behavior
+                target.dispatchEvent(event);
               }
             }
             break;

packages/rrweb/test/events/hover.ts

@@ -0,0 +1,113 @@
+import { IncrementalSource, MouseInteractions } from '@rrweb/types';
+import type { eventWithTime } from '../../../types/src';
+
+const events: eventWithTime[] = [
+  {
+    type: 4,
+    data: {
+      href: '',
+      width: 1600,
+      height: 900,
+    },
+    timestamp: 0,
+  },
+  {
+    type: 2,
+    data: {
+      node: {
+        type: 0,
+        childNodes: [
+          { type: 1, name: 'html', publicId: '', systemId: '', id: 2 },
+          {
+            type: 2,
+            tagName: 'html',
+            attributes: { lang: 'en' },
+            childNodes: [
+              {
+                type: 2,
+                tagName: 'head',
+                attributes: {},
+                childNodes: [
+                  {
+                    id: 101,
+                    type: 2,
+                    tagName: 'style',
+                    attributes: {},
+                    childNodes: [
+                      {
+                        id: 102,
+                        type: 3,
+                        isStyle: true,
+                        textContent: 'div:hover { background-color: gold; }',
+                      },
+                    ],
+                  },
+                ],
+                id: 4,
+              },
+              { type: 3, textContent: '\n  ', id: 13 },
+              {
+                type: 2,
+                tagName: 'body',
+                attributes: {},
+                childNodes: [
+                  { type: 3, textContent: '\n    ', id: 15 },
+                  {
+                    type: 2,
+                    tagName: 'div',
+                    attributes: {
+                      style:
+                        'border: 1px solid #000000; width: 100px; height: 100px;',
+                    },
+                    childNodes: [{ type: 3, textContent: '\n    ', id: 17 }],
+                    id: 16,
+                  },
+                ],
+                id: 14,
+              },
+            ],
+            id: 3,
+          },
+        ],
+        id: 1,
+      },
+      initialOffset: { left: 0, top: 0 },
+    },
+    timestamp: 10,
+  },
+  {
+    type: 3,
+    data: {
+      source: IncrementalSource.MouseInteraction,
+      type: MouseInteractions.MouseDown,
+      id: 16,
+      x: 30,
+      y: 30,
+    },
+    timestamp: 100,
+  },
+  {
+    type: 3,
+    data: {
+      source: IncrementalSource.MouseInteraction,
+      type: MouseInteractions.MouseUp,
+      id: 16,
+      x: 30,
+      y: 30,
+    },
+    timestamp: 150,
+  },
+  {
+    type: 3,
+    data: {
+      source: IncrementalSource.MouseInteraction,
+      type: MouseInteractions.Click,
+      id: 16,
+      x: 30,
+      y: 30,
+    },
+    timestamp: 155,
+  },
+];
+
+export default events;

packages/rrweb/test/replay/hover.test.ts

@@ -0,0 +1,71 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import { launchPuppeteer, waitForRAF } from '../utils';
+import { toMatchImageSnapshot } from 'jest-image-snapshot';
+import type * as puppeteer from 'puppeteer';
+import events from '../events/hover';
+
+interface ISuite {
+  code: string;
+  styles: string;
+  browser: puppeteer.Browser;
+  page: puppeteer.Page;
+}
+
+expect.extend({ toMatchImageSnapshot });
+
+describe('replayer', function () {
+  jest.setTimeout(10_000);
+
+  let code: ISuite['code'];
+  let styles: ISuite['styles'];
+  let browser: ISuite['browser'];
+  let page: ISuite['page'];
+
+  beforeAll(async () => {
+    browser = await launchPuppeteer({ devtools: true });
+
+    const bundlePath = path.resolve(__dirname, '../../dist/rrweb.js');
+    const stylePath = path.resolve(
+      __dirname,
+      '../../src/replay/styles/style.css',
+    );
+    code = fs.readFileSync(bundlePath, 'utf8');
+    styles = fs.readFileSync(stylePath, 'utf8');
+  });
+
+  beforeEach(async () => {
+    page = await browser.newPage();
+    await page.goto('about:blank');
+    await page.addStyleTag({
+      content: styles,
+    });
+    await page.evaluate(code);
+    await page.evaluate(`let events = ${JSON.stringify(events)}`);
+
+    page.on('console', (msg) => console.log('PAGE LOG:', msg.text()));
+  });
+
+  afterEach(async () => {
+    await page.close();
+  });
+
+  afterAll(async () => {
+    await browser.close();
+  });
+
+  describe('hover', () => {
+    it('should trigger hover on mouseDown', async () => {
+      await page.evaluate(`
+      const { Replayer } = rrweb;
+      const replayer = new Replayer(events);
+      replayer.pause(110); // mouseDown event is at 100
+    `);
+
+      await waitForRAF(page);
+
+      const image = await page.screenshot();
+      expect(image).toMatchImageSnapshot();
+    });
+  });
+});