Fix: processed-node-manager is created even in the environment that doesn't need a recorder (#1186)

* Fix: processed-node-manager is created even in the environment that doesn't need a recorder

* apply Justin's suggestion

End the RAF loop when the recorder stops

packages/rrweb/src/record/index.ts

@@ -4,11 +4,7 @@ import {
   SlimDOMOptions,
   createMirror,
 } from 'rrweb-snapshot';
-import {
-  initObservers,
-  mutationBuffers,
-  processedNodeManager,
-} from './observer';
+import { initObservers, mutationBuffers } from './observer';
 import {
   on,
   getWindowWidth,
@@ -36,6 +32,7 @@ import { IframeManager } from './iframe-manager';
 import { ShadowDomManager } from './shadow-dom-manager';
 import { CanvasManager } from './observers/canvas/canvas-manager';
 import { StylesheetManager } from './stylesheet-manager';
+import ProcessedNodeManager from './processed-node-manager';
 import {
   callbackWrapper,
   registerErrorHandler,
@@ -306,6 +303,8 @@ function record<T = eventWithTime>(
       });
   }
 
+  const processedNodeManager = new ProcessedNodeManager();
+
   canvasManager = new CanvasManager({
     recordCanvas,
     mutationCb: wrappedCanvasMutationEmit,
@@ -616,6 +615,7 @@ function record<T = eventWithTime>(
     }
     return () => {
       handlers.forEach((h) => h());
+      processedNodeManager.destroy();
       recording = false;
       unregisterErrorHandler();
     };

packages/rrweb/src/record/observer.ts

@@ -41,7 +41,6 @@ import {
   selectionCallback,
 } from '@rrweb/types';
 import MutationBuffer from './mutation';
-import ProcessedNodeManager from './processed-node-manager';
 import { callbackWrapper } from './error-handler';
 
 type WindowWithStoredMutationObserver = IWindow & {
@@ -54,7 +53,6 @@ type WindowWithAngularZone = IWindow & {
 };
 
 export const mutationBuffers: MutationBuffer[] = [];
-export const processedNodeManager = new ProcessedNodeManager();
 
 // Event.path is non-standard and used in some older browsers
 type NonStandardEvent = Omit<Event, 'composedPath'> & {

packages/rrweb/src/record/processed-node-manager.ts

@@ -5,6 +5,8 @@ import type MutationBuffer from './mutation';
  */
 export default class ProcessedNodeManager {
   private nodeMap: WeakMap<Node, Set<MutationBuffer>> = new WeakMap();
+  // Whether to continue RAF loop.
+  private loop = true;
 
   constructor() {
     this.periodicallyClear();
@@ -13,7 +15,7 @@ export default class ProcessedNodeManager {
   private periodicallyClear() {
     requestAnimationFrame(() => {
       this.clear();
-      this.periodicallyClear();
+      if (this.loop) this.periodicallyClear();
     });
   }
 
@@ -31,4 +33,9 @@ export default class ProcessedNodeManager {
   private clear() {
     this.nodeMap = new WeakMap();
   }
+
+  public destroy() {
+    // Stop the RAF loop.
+    this.loop = false;
+  }
 }

packages/rrweb/src/utils.ts

@@ -574,6 +574,7 @@ export function getInputType(element: HTMLElement): Lowercase<string> | null {
   return element.hasAttribute('data-rr-is-password')
     ? 'password'
     : element.hasAttribute('type')
-    ? (element.getAttribute('type')!.toLowerCase() as Lowercase<string>)
+    ? // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion, @typescript-eslint/no-non-null-assertion
+      (element.getAttribute('type')!.toLowerCase() as Lowercase<string>)
     : null;
 }