css - mat-expansion-panel 添加下拉打开问题

Question

我添加了 Angular material mat-expansion-panel 到 select option ，当我点击选择菜单时，mat-expansion-panel 自动打开，任何人都知道如何解决这个问题，

Stack blitz example

我的代码

component.html

<mat-accordion>
  <mat-expansion-panel>
    <mat-expansion-panel-header>
      <mat-panel-title>
       <select class="form-control" id="exampleFormControlSelect1">
      <option>1</option>
      <option>2</option>
      <option>3</option>
      <option>4</option>
      <option>5</option>
    </select>
      </mat-panel-title>
      <mat-panel-description>
        Type your name and age
      </mat-panel-description>
    </mat-expansion-panel-header>

    <mat-form-field>
      <input matInput placeholder="First name">
    </mat-form-field>

    <mat-form-field>
      <input matInput placeholder="Age">
    </mat-form-field>
  </mat-expansion-panel>
  <mat-expansion-panel (opened)="panelOpenState = true"
                       (closed)="panelOpenState = false">
    <mat-expansion-panel-header>
      <mat-panel-title>
        Self aware panel
      </mat-panel-title>
      <mat-panel-description>
        Currently I am {{panelOpenState ? 'open' : 'closed'}}
      </mat-panel-description>
    </mat-expansion-panel-header>
    <p>I'm visible because I am open</p>
  </mat-expansion-panel>
</mat-accordion>

Answer 1

我没有遇到您描述的问题，但我明白您的意思。发生的情况是，当您单击选择时，您还单击了扩展面板。您可以通过阻止点击传递选择来防止此行为。

stopPropagation

在您的 HTML 中，将选择更改为:

<select class="form-control" id="exampleFormControlSelect1" (click)="$event.stopPropagation()">