Question

我查看了有角度的文档和其他资源，但没有找到任何东西。我在Angular7上工作。如何进行销毁过程？

Answer 1

import { Component, OnDestroy } from '@angular/core';

@Component({...})
export class MyComponent implements OnDestroy {
    ngOnDestroy(): void {
        // called when the component gets destroyed
    }
}

您可以在此处了解有关生命周期的更多信息：https://angular.io/guide/lifecycle-hooks

Answer 2

See this scenario


import { Subscription } from 'rxjs';
  currentUserSub: Subscription;


  getCurrentUser() {
    this.currentUserSub = this.authenticationService.currentUser.subscribe(x => {
      if (x) {
        this.currentUser = x[0].MemberId;
      } else { }
    });



 ngOnDestroy() {
    // unsubscribe to ensure no memory leaks
    this.currentUserSub.unsubscribe();
  }


  }

Answer 3

一种取消订阅组件中所有可观察对象的干净方法：

new webpack.optimize.CommonsChunkPlugin({
   name: 'common',
   filename: `${configuration.webpack.filenameTemplate}.js`,
   minChunks: 3,
}),

我应该销毁什么？我该怎么办

3 个答案: