Bootstrap Collapse not Collapsing

34
votes

I am trying to create a collapsable component using Bootstrap. My code is this

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<script src="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>

<div class="panel-group" id="accordion">
  <div class="panel panel-default">
    <div class="panel-heading">
      <h4 class="panel-title">
        <a data-toggle="collapse" data-parent="#accordion" href="#collapseOne">
      Collapsible Group Item #1
    </a>
      </h4>
    </div>
    <div id="collapseOne" class="panel-collapse collapse in">
      <div class="panel-body">
        Anim pariatur cliche reprehenderit
      </div>
    </div>
  </div>
</div>

The "Collapsible Group Item #1" when clicked should collapse the items in class "panel-body" but it doesn't there is no effect of click. I copied this code directly from Bootstrap documentation still it does not work. Can anyone figure out what is the problem?

11
javascriptcsstwitter-bootstrapcollapse

11 Answers

50
votes

jQuery is required (if you're using Bootstrap 3 or 4) ;-)

<html>
<head>
    <link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
    <!-- THIS LINE -->
    <script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
    <script src="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
</head>
<body>

<div class="panel-group" id="accordion">
    <div class="panel panel-default">
        <div class="panel-heading">
            <h4 class="panel-title">
                <a data-toggle="collapse" data-parent="#accordion" href="#collapseOne">
                    Collapsible Group Item #1
                </a>
            </h4>
        </div>
        <div id="collapseOne" class="panel-collapse collapse in">
            <div class="panel-body">
                Anim pariatur cliche reprehenderit
            </div>
        </div>
    </div>
</div>

</body>
</html>
21
votes

bootstrap.js is using jquery library so you need to add jquery library before bootstrap js.

so please add it jquery library like

Note : Please maintain order of js file. html page use top to bottom approach for compilation

<head>
    <link rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
    <script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
    <script src="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
</head>
17
votes

I was getting crazy for one hour... I reply to this question after 7 years, because if you are using the new Boostrap 5, the attributes are data-bs-toggle, data-bs-parent, and data-bs-target, pay attention to the -bs- in the middle.

10
votes

Add jQuery and make sure only one link for jQuery cause more than one doesn't work...

7
votes

You need jQuery see bootstrap's basic template

1
votes

If you are using latest Bootstrap version. Then you just need to replace this data-bs-toggle="collapse" data-bs-target="#navbarNav" to this data-toggle="collapse" data-target="#navbarNav" and don't need to do more. It means you just need to remove -bs-

1
votes

If using Bootstrap 4.5 collapse component, use these two links inside the body of HTML tag

<script src="https://code.jquery.com/jquery-3.5.1.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-ho+j7jyWK8fNQe+A12Hb8AhRq26LrZ/JpcUGGOn+Y7RsweNrtN/tE3MoK7ZeZDyx" crossorigin="anonymous"></script>
0
votes

I had this problem and the problem was bootstrap.js wasn't load in Yii2 framework.First check is jquery loaded in inspect and then check bootstrap.js is loaded?If you used any tooltip Popper.js is needed before bootsrap.js.

0
votes

Make sure to change the bootstrap cdn versions to check. try bootstap4 . Avoid bootstrap 5 as it is still in beta

0
votes

Another good reason for this is either incorrectly formatted html, so things aren't closed up properly, or your id tags have things like full stops in them, that jquery will bawk at.

-5
votes

Maybe your mobile view port is not set. Add following meta tag inside <head></head> to allow menu to work on mobiles.

<meta name=viewport content="width=device-width, initial-scale=1">