<a class="btn btn-outline-danger fs--1 py-2 px-3" data-bs-toggle="collapse" href="#collapseExample" role="button" aria-expanded="false" aria-controls="collapseExample">
Link with href
</a>
<button class="btn btn-outline-primary fs--1 py-2 px-3" type="button" data-bs-toggle="collapse" data-bs-target="#collapseExample" aria-expanded="false" aria-controls="collapseExample">
Button with data-bs-target
</button>

<div class="collapse" id="collapseExample">
<div class="card card-body">
    Some placeholder content for the collapse component. This panel is hidden by default but revealed when the user activates the relevant trigger.
</div>
</div>

<a class="btn btn-outline-primary fs--1 py-2 px-3" data-bs-toggle="collapse" href="#multiCollapseExample1" role="button" aria-expanded="false" aria-controls="multiCollapseExample1">Toggle first element</a>
<button class="btn btn-outline-secondary fs--1 py-2 px-3" type="button" data-bs-toggle="collapse" data-bs-target="#multiCollapseExample2" aria-expanded="false" aria-controls="multiCollapseExample2">Toggle second element</button>
<button class="btn btn-outline-warning fs--1 py-2 px-3" type="button" data-bs-toggle="collapse" data-bs-target=".multi-collapse" aria-expanded="false" aria-controls="multiCollapseExample1 multiCollapseExample2">Toggle both elements</button>

<div class="row mt-3">
<div class="col">
    <div class="collapse multi-collapse" id="multiCollapseExample1">
        <div class="card card-body">
            Some placeholder content for the first collapse component of this multi-collapse example. This panel is hidden by default but revealed when the user activates the relevant trigger.
        </div>
    </div>
</div>
<div class="col">
    <div class="collapse multi-collapse" id="multiCollapseExample2">
        <div class="card card-body">
            Some placeholder content for the second collapse of this multi-collapse example. This panel is hidden by default but revealed when the user activates the relevant trigger.
        </div>
    </div>
</div>
</div>