Added checks to stop prevent listening if Editor instance is dead (#27)

Author: ashutosh-jena-mindfire

src/editor/core/draw/Draw.ts

@@ -143,6 +143,8 @@ export class Draw {
   private intersectionPageNo: number
   private lazyRenderIntersectionObserver: IntersectionObserver | null
 
+  private isDestroyed: boolean = false;
+
   constructor(
     rootContainer: HTMLElement,
     options: DeepRequired<IEditorOption>,
@@ -357,6 +359,7 @@ export class Draw {
   }
 
   public setIntersectionPageNo(payload: number) {
+    if (this.isDestroyed) return;
     this.intersectionPageNo = payload
     if (this.listener.intersectionPageNoChange) {
       this.listener.intersectionPageNoChange(this.intersectionPageNo)
@@ -1716,6 +1719,7 @@ export class Draw {
   }
 
   public render(payload?: IDrawOption) {
+    if (this.isDestroyed) return;
     const { header, footer } = this.options
     const {
       isSubmitHistory = true,
@@ -1849,6 +1853,7 @@ export class Draw {
   }
 
   public destroy() {
+    this.isDestroyed = true;
     this.container.remove()
     this.globalEvent.removeEvent()
     this.scrollObserver.removeEvent()

src/editor/core/range/RangeManager.ts

@@ -318,6 +318,7 @@ export class RangeManager {
   }
 
   public setRangeStyle() {
+    if (!this.eventBus || !this.listener) return;
     const rangeStyleChangeListener = this.listener.rangeStyleChange
     const isSubscribeRangeStyleChange =
       this.eventBus.isSubscribe('rangeStyleChange')