Hello everyone, I'm attempting to recreate a collapsing accordion feature that I came across on https://getbootstrap.com/docs/4.1/components/collapse/. However, I'm facing issues as the accordions are not collapsing as expected. Strangely, they begin in the uncollapsed position, whereas in the example, they start off collapsed and then expand upon clicking a button. Here is my code – I hope someone can assist me with this problem.
Update: For those searching for solutions online, below is the code that worked for me. Take note that using data-target => attr.data-target is the only way to utilize text binding with data-target.
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
<div class="accordion" id="accordionExample">
<div class="card" *ngFor="let grocery of groceryList;index as index">
<div class="card-header" id="grocery1{{index}}">
<h5 class="mb-0">
<button class="btn btn-link" type="button" data-toggle="collapse" attr.data-target="#grocery2{{index}}" aria-expanded="true" aria-controls="grocery2{{index}}">
{{grocery.recipeName}}
</button>
</h5>
</div>
<div id="grocery2{{index}}" class="collapse show" aria-labelledby="grocery1{{index}}" data-parent="#accordionExample">
<div class="card-body">
<ul class="list-group" id="filterList">
<li class="list-group-item">
<a href="#" class="list-down-btn" data-toggle="#subgroup"><span class="glyphicon glyphicon-chevron-down"></span></a>
<ul id="subgroup" class="list-group">
<li class="list-group-item" *ngFor="let ingredient of grocery.ingredients">{{ingredient}}</li>
</ul>
</li>
</ul>
</div>
</div>
</div>
</div>