How to make collapse button in bootstrap?

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In this article, we will use some bootstrap classes to design collapse button.

To make collapse button, put .data-toggle="collapse" class to create collapse button in bootstrap.

The collapse plugin is used to hide or show another element or the content contained by those elements. This is used specifically to reduce the space taken by the content.

Table of contents

  • Includes bootstrap view
  • Includes bootstrap library
  • Define its class name

Step 1: Includes bootstrap view

To ensure proper rendering and touch zooming for all devices, add the responsive viewport meta tag to your <head>.

    <meta name="viewport" content="width=device-width,initial-scale=1,shrink-to-fit=no">

Step 2: Includes bootstrap library

First of all, load the Bootstrap framework CSS into the head tag of your webpage.

<!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

Step 3: Define its class name

After that, create collapse button with a class name . data-toggle="collapse".

    <h1>Collapse Example</h1>
    <p>
        <a class="btn btn-primary" data-toggle="collapse" href="#collapseExample" role="button" aria-expanded="false"
            aria-controls="collapseExample">
            Link with href
        </a>
        <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#collapseExample"
            aria-expanded="false" aria-controls="collapseExample">
            Button with data-target
        </button>
    </p>
    <div class="collapse" id="collapseExample">
        <div class="card card-body">
            "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et
            dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex
            ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat
            nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit
            anim id est laborum."
        </div>
    </div>

Example.

Let’s look at the following example to understand how it basically works:

<!doctype html>
<html lang="en">

<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css"
        integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

    <title>collapseExample</title>
</head>

<body>
    <h1>Collapse Example</h1>
    <p>
        <a class="btn btn-primary" data-toggle="collapse" href="#collapseExample" role="button" aria-expanded="false"
            aria-controls="collapseExample">
            Link with href
        </a>
        <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#collapseExample"
            aria-expanded="false" aria-controls="collapseExample">
            Button with data-target
        </button>
    </p>
    <div class="collapse" id="collapseExample">
        <div class="card card-body">
            "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et
            dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex
            ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat
            nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit
            anim id est laborum."
        </div>
    </div>
    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
        integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
        crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js"
        integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
        crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js"
        integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
        crossorigin="anonymous"></script>
</body>

</html>

Check the output of the above code example.

Bootstrap, Collapse Button

Bootstrap, Collapse Button

All the best 👍