Angular material expansion panel and accordion example


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(P) Bookmarks.dev - Open source Bookmarks and Code Snippets Manager for Developers & Co. See our How To guides to help you get started. Public Bookmarks Repo on Github - Star


I find accordions pretty well suited for FAQs or HowTo pages. That’s why I chose one for the HowTo page of www.bookmarks.dev, which is implemented with angular material expansion panel and accordion.

HowTo Accordion Showcase

This blog post presents the source code for that with a couple of notes.

Octocat Source code for bookmarks.dev is available on Github - Star

The source code

  <mat-accordion>
    <mat-expansion-panel>
      <mat-expansion-panel-header>
        <h4><i class="fas fa-xs fa-info-circle"></i> Get started</h4>
      </mat-expansion-panel-heade}r>

      <ng-template matExpansionPanelContent>
        <app-howto-get-started></app-howto-get-started>
      </ng-template>
    </mat-expansion-panel>

    <mat-expansion-panel>
      <mat-expansion-panel-header>
        <h4><i class="fas fa-xs fa-info-circle"></i> Save bookmarks</h4>
      </mat-expansion-panel-header>
      <ng-template matExpansionPanelContent>
        <app-howto-save></app-howto-save>
      </ng-template>
    </mat-expansion-panel>

    <mat-expansion-panel>
      <mat-expansion-panel-header>
        <h4><i class="fas fa-xs fa-info-circle"></i> Search bookmarks</h4>
      </mat-expansion-panel-header>
      <ng-template matExpansionPanelContent>
        <app-howto-search></app-howto-search>
      </ng-template>
    </mat-expansion-panel>

    <mat-expansion-panel>
      <mat-expansion-panel-header>
        <h4><i class="fas fa-xs fa-info-circle"></i> Bookmarklets</h4>
      </mat-expansion-panel-header>
      <ng-template matExpansionPanelContent>
        <app-howto-bookmarklets></app-howto-bookmarklets>
      </ng-template>
    </mat-expansion-panel>

    <mat-expansion-panel>
      <mat-expansion-panel-header>
        <h4><i class="fas fa-xs fa-info-circle"></i> Codelets</h4>
      </mat-expansion-panel-header>
      <ng-template matExpansionPanelContent>
        <app-howto-codelets></app-howto-codelets>
      </ng-template>
    </mat-expansion-panel>
  </mat-accordion>

Notes

  • the mat-expansion-panel components are encapsulated in an mat-accordion element
  • the code itself for the several sections is encapsulated in own component, for better code readability and to access them directly
  • the construct ng-template with the matExpansionPanelContent attribute in the is used to defer initialization until the panel is open. By default, the expansion panel content will be initialized even when the panel is closed
  • by setting the input multi="true" (default false) on mat-accordion you could allow the expansions state to be set independently of each other

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Adrian Matei

Adrian Matei
Life force expressing itself as a coding capable human being

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Published on November 05, 2020