Angular-material:- 更改 Accordion 中 mat-expansion-panel 的默认图标

Question

<分区>

Answer 1

为您的扩展面板提供一个引用 ID example并设置 hideToggle属性为 true . 将您的图标放在 <mat-panel-description> 中并使用面板的扩展属性显示或隐藏相关图标。

 <mat-expansion-panel  class="custom-header" hideToggle="true" #example>
    <mat-expansion-panel-header>
      <mat-panel-title>
        Collapsible Group Item #1
      </mat-panel-title>
      <mat-panel-description> 
        <mat-icon *ngIf="!example.expanded">add</mat-icon>
        <mat-icon *ngIf="example.expanded">add_box</mat-icon>
      </mat-panel-description>
    </mat-expansion-panel-header>

     <p>
      Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.
    </p>
  </mat-expansion-panel>

CSS:

.custom-header .mat-expansion-panel-header-title, 
.custom-header .mat-expansion-panel-header-description {
  flex-basis: 0;
}

.custom-header .mat-expansion-panel-header-description {
  justify-content: space-between;
  align-items: center;
}

同时检查链接:

https://stackblitz.com/edit/angular-irnxvd?file=src%2Fapp%2Fapp.component.css