使用Angular 2+在Button单击上添加DOM元素 [英] Add DOM element on Button click with Angular 2+

问题描述

我正在学习如何使用Angular 2+操作DOM，并且我想在触发click事件时添加类型为email的Input字段.我在Google上进行了一些研究，但在Angular2 +中找不到解决方案.

Hi I'm learning how to manipulate the DOM with Angular 2+ and I want to add an Input field with type email when the click event is triggered. I've researched a bit with google, but couldn't find a soluion with Angular2+.

<form>
<fieldset>
  <legend>
    <span class="number">3</span>E-Mail Receipants</legend>
  <input type="email" name="email1" placeholder="E-Mail Recipients [e-mail]">
  <input type="button" value="Add E-Mail" (click)="addInputEmail()">
</fieldset>
<input type="submit" value="Generate Template" />

如何在已经存在的字段下生成额外的inpult字段?我要使用什么工具?

How can I generate extra inpult fields under the already existing one? What are my tools to use?

addInputEmail(){
}

在每个按钮上单击都会生成一个新的输入字段.我有点绝望，因为我首先不知道要使用什么工具".

On each button click a new input field should be generated. Im kinda hopeless because I don't know what 'Tools' I have to manipulate it in the first place.

谢谢.

推荐答案

类似的方法应该起作用-

Something like this should work --

 <div *ngFor='let email of emails'>
   <input type="email" [attr.name]="email" >
 </div>
 <input type="button" value="Add E-Mail" (click)="addInputEmail()">

-

export class formComponent {
  emails = ["email1"];
  emailNumber = 1;
  constructor () {

  }

  addInputEmail() {
    this.emailNumber++; 
    this.emails.push("email"+this.emailNumber)
  }
}

希望这是有道理的.

您正在基于电子邮件数组构建输入元素.然后在按钮上按，您将添加到在模板中创建新输入的数组.

You are building the input elements based on the array of emails. And on the button press you add to the array which creates a new input in the template.

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