重构window.onresize调用

src/app/working-area/working-area.component.ts

@@ -197,9 +197,8 @@ export class WorkingAreaComponent extends EventEmitter implements OnInit, AfterV
 
   ngAfterViewInit(): void {
     this.createCanvas();
-    let that = this
+    window.onresize = () => {
-    window.onresize = function(){
+      this.resizeCanvas();
-      that.resizeCanvas()
     };
   }
   /**