如何在 ngx-bootstrap 手风琴中添加折叠图标

Question

In my Angular app that is using ngx-bootstrap , I would like to add a collapse icon which reflects the status of the accordion (collapsed/expanded) like the following:

Answer 1

You can basically do this in css:

.accordion-toggle[aria-expanded="true"]:before {
    content: "\f107";
    font: normal normal normal 14px/1 FontAwesome;
}

.accordion-toggle[aria-expanded="false"]:before {
    content: '\f106';
    font: normal normal normal 14px/1 FontAwesome;
}

Just have to style the before selector with the font familly of your favorite icon...

Answer 2

Here is a solution that worked for me

<accordion-group [isOpen]="false" #myGroup>
  <button class="btn btn-light float-right">
    {{ myGroup?.isOpen ? 'Opened' : 'Closed' }}
    <i class="fas" [ngClass]="{'fa-caret-down': myGroup?.isOpen, 'fa-caret-up': !myGroup?.isOpen}"></i>
  </button>
</accordion-group>

Answer 3

You can use the accordion-group input isOpen .

HTML

<accordion-group [isOpen]="isContentOpen">
  <button class="btn btn-light float-right">
    <i *ngIf="isContentOpen" class="fas fa-caret-up">Open</i>
    <i *ngIf="!isContentOpen" class="fas fa-caret-down">Close</i>
  </button>
</accordion-group>

TS

isContentOpen: boolean = false;

I recommend installing https://fontawesome.com/

Answer 4

Following answer works with ngx-bootstrap@5.xx . Also solves the problem for people wanting to use something different than FontAwesome:

<!-- Please note that the #accordionGroupRef is scoped! -->
<accordion-group
    *ngFor="let number of [1,2,3,4];"
    [isOpen]="false"
    #accordionGroupRef
>

    <!-- Header -->
    <h5 class="m-0" accordion-heading>
        {{ accordionGroupRef.isOpen ? "OPEN" : "CLOSED"}}
        I am accordion {{number}}
        <span class="float-right"> I float all the way on the right!</span>
    </h5>    

    <!-- Content -->
    Accordion content
</accordion-group>