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How to Style the mat-select Panel in Angular Material: A Guide to Different Techniques

Patricia Arquette
Patricia ArquetteOriginal
2024-10-30 05:36:02570browse

How to Style the mat-select Panel in Angular Material: A Guide to Different Techniques

Styling mat-select's Panel in Angular Material

To style the mat-select panel, you can specify a custom panelClass in the HTML markup, as you've done:

<mat-select placeholder="Search for"
    [(ngModel)]="searchClassVal"
    panelClass="my-select-panel-class"
    (change)="onSearchClassSelect($event)">
    <mat-option *ngFor="let class of searchClasses" [value]="class.value">{{class.name}}</mat-option>
  </mat-select>

However, applying CSS styles to this custom panel class can sometimes prove problematic. Let's explore several possible solutions:

  1. Using ::ng-deep:
    Utilize the ::ng-deep shadow-piercing descendant combinator to force the styles through the child component tree:

    <code class="css">::ng-deep .mat-select-content{
        width:2000px;
        background-color: red;
        font-size: 10px;   
    }</code>
  2. Employing ViewEncapsulation:
    Set the encapsulation mode to ViewEncapsulation.None to break the view encapsulation and apply the styles directly from the component:

    <code class="typescript">@Component({
        ....
        encapsulation: ViewEncapsulation.None
    })  </code>
  3. Adding Styles to style.css:
    Force the styles using the !important keyword:

    <code class="css">.mat-select-content{
       width:2000px !important;
       background-color: red !important;
       font-size: 10px !important;
     } </code>
  4. Incorporating Inline Styles:
    Apply inline styles directly to the mat-option element:

    <code class="html"><mat-option style="width:2000px; background-color: red; font-size: 10px;" ...></code>

These methods should allow you to successfully style the mat-select panel in Angular Material.

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