<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.3/css/bootstrap.min.css">
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.3/js/bootstrap.min.js"></script>
<div id="accordion">
<div class="card">
<div class="card-header">
<a class="card-link" data-toggle="collapse" data-parent="#accordion" href="#collapseOne">
Collapsible Group Item #1
</a>
</div>
<div id="collapseOne" class="collapse show">
<div class="card-body">
Lorem ipsum..
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<a class="collapsed card-link" data-toggle="collapse" data-parent="#accordion" href="#collapseTwo">
Collapsible Group Item #2
</a>
</div>
<div id="collapseTwo" class="collapse">
<div class="card-body">
Lorem ipsum..
</div>
</div>
</div>
<div class="card">
<div class="card-header">
<a class="collapsed card-link" data-toggle="collapse" data-parent="#accordion" href="#collapseThree">
Collapsible Group Item #3
</a>
</div>
<div id="collapseThree" class="collapse">
<div class="card-body">
Lorem ipsum..
</div>
</div>
</div>
</div>
this accordion code not working in my html project. I tried too many time but failed to worked it successfully.
also tried w3school snippet above. first one is working very nice but whenever I am trying to collapse second one it not working. it will collapse for couple of milli seconds after that it will automatically get display none property.
I am also tried to active collapse via jquery but the result is same.
Here is working fiddle for you
I think you simply forget to include jQuery before the bootstrap script.
Simply check your imports, should look somehow like this:
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>
and jQuery import on top of all that