Tips for creating a seamless Bootstrap collapse effect

I have noticed a slight flicker in the content collapse when using this code. Is there a way to make it collapse more smoothly?

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>

<div class="container">
  <h2>Simple Collapsible</h2>
  <p>Click on the button to toggle between showing and hiding content.</p>
  <button type="button" class="btn btn-info" data-toggle="collapse" data-target="#demo">Simple collapsible</button>
  <div id="demo" class="collapse in">
    Lorem ipsum dolor sit amet, consectetur adipisicing 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.
  </div><br>
  <button type="button" class="btn btn-info" data-toggle="collapse" data-target="#demo2">Simple collapsible</button>
  <div id="demo2" class="collapse in">
    Lorem ipsum dolor sit amet, consectetur adipisicing 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.
  </div>
</div>
javascripthtmlcsstwitter-bootstrap

Answer №1

Enclose your content within two div containers and avoid using the br tag inside them.

<div class="container">
    <button type="button" class="btn btn-info" data-toggle="collapse" data-target="#demo2">
    Simple collapsible
    </button>
    <div id="demo2" class="collapse in">Lorem ...</div>
</div>
<div class="container">
    <button type="button" class="btn btn-info" data-toggle="collapse" data-target="#demo2">
    Simple collapsible
    </button>
    <div id="demo2" class="collapse in">Lorem...</div>
</div>

Example:

<!DOCTYPE html>
<html>
<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
  <h2>Simple Collapsible</h2>
  <p>Click on the button to toggle between showing and hiding content.</p>
  
  <div class="container">
    <button type="button" class="btn btn-info" data-toggle="collapse" data-target="#demo">
    Simple collapsible
    </button>
    <div id="demo" class="collapse in">
      Lorem ipsum dolor sit amet, consectetur adipisicing 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.
    </div>
  </div>
  <div class="container">
    <button type="button" class="btn btn-info" data-toggle="collapse" data-target="#demo2">
    Simple collapsible
    </button>
    <div id="demo2" class="collapse in">
      Lorem ipsum dolor sit amet, consectetur adipisicing 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.
    </div>
  </div>
</div>
    
</body>
</html>

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