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Bootstrap 4 .border-danger class

Use the border-danger class to set a red border to an element.

Set the border-danger class to an element as if we include any other class −

<div class="new border border-danger">
  Red Border
</div>

Above, we have also set another class “new”, to style the element −

<style>
.new {
  width: 120px;
  height: 120px;
  margin: 20px;
}
</style>

You can try to run the following code to implement the border-danger class −

Example

Live Demo

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Bootstrap Example</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js"></script>
    <style>
    .new {
      width: 120px;
      height: 120px;
      margin: 20px;
     }
    </style>
  </head>
<body>

<div class="container">
  <p>Rectangle with red border:</p>
  <div class="new border border-danger">Red Border</div>
</div>

</body>
</html>
Updated on 16-Jun-2020 08:52:41

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