使用cdk CdkDragDrop的两个数组的奇怪行为

import { CdkDragDrop, moveItemInArray, transferArrayItem } from '@angular/cdk/drag-drop';

drop(event: CdkDragDrop<string[]>) {
  if (event.previousContainer === event.container) {
    moveItemInArray(event.container.data, event.previousIndex, event.currentIndex);
  } else {
    transferArrayItem(event.previousContainer.data,
                      event.container.data,
                      event.previousIndex,
                      event.currentIndex);
  }
}

<div *ngFor="let item of items; trackBy: trackItem">
  <!-- content -->
</div>

trackItem(index: number, item: any): number {
  return item.id; // 假设每个项都有唯一的 id
}

import { DragDropModule } from '@angular/cdk/drag-drop';

@NgModule({
  declarations: [...],
  imports: [
    ...,
    DragDropModule
  ],
  ...
})
export class YourModule { }