Angular 7 Reactive Form-渲染和删除元素的问题

由 发布于

嗨，我有一个简单的角度分量的问题，我使用反应形式插入文本，然后按ng循环显示结果

模板

<form [formGroup]="colorsForm">
  <div>
    <label for="colorName">Color Name</label>
      <input id="colorName" type="text" class="form-control" 
        formControlName="colorName" name="colorName"/>
  </div>
  <button  type="button"  (click)="addCorlo()">ADD</button>
</form>
<ul>
<li *ngFor="let color of colorsList">{{ color.colorName }} <button (click)="delete()">DELETE</button></li>
</ul>

TS

import { Component, VERSION } from '@angular/core';
import { FormBuilder, FormGroup, FormArray, Validators } from '@angular/forms';


@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: [ './app.component.css' ]
})
export class AppComponent  {
  name = 'Reactive Form';
  colorsForm: FormGroup; // New Reactive Form
  colorsList: any[] = [];


  constructor(
    private fb: FormBuilder
  ) { }

  ngOnInit() {

    this.colorsForm = this.fb.group({
      colorName: [null]
    });

  }

  addCorlo() {
    if (this.colorsForm.valid) {
      let color = { 
        colorName: this.colorsForm.value.colorName,
      };
      this.colorsList.push(color);
    }
    this.colorsForm.reset();
   }

   delete(){
     console.log('delete')
   }
}

我试图删除该元素，但 我没有成功.....

this is a stackblitz example ExampleLink