<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Get Bootstrap Collapse Instance Using jQuery</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet">
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"></script>
$(document).ready(function(){
$("#myBtn").click(function(){
var myCollapse = bootstrap.Collapse.getInstance($("#myCollapse")[0]);
<button type="button" class="btn btn-primary" data-bs-toggle="collapse" data-bs-target="#myCollapse">Toggle Element</button>
<button type="button" class="btn btn-success" id="myBtn">Get Collapse Instance</button>
<div class="collapse" id="myCollapse">
<div class="card card-body">This is a simple example of showing and hiding specific element via data attributes. Click trigger button to toggle this panel.</div>
<p class="mt-4">First activate collapse by clicking the "Toggle Element" button, then press the "Get Collapse Instance" button to get the collapse instance associated with a DOM element.</p>
<p>Press Ctrl+Shift+J (Windows / Linux) or Cmd+Opt+J (Mac) to open the browser console panel.</p>