Bootstrap Alerts


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Alerts in bootstrap

Bootstrap 4 provides us predefined alerts

Alerts are created with the .alert class, followed by .alert-success, .alert-info, .alert-warning, .alert-danger, .alert-primary, .alert-secondary, .alert-light or .alert-dark


Success! This alert box could indicate a successful or positive action.
Info! This alert box could indicate a neutral informative change or action.
Warning! This alert box could indicate a warning that might need attention.
Danger! This alert box could indicate a dangerous or potentially negative action.
Primary! Indicates an important action.
Secondary! Indicates a slightly less important action.
Dark! Dark grey alert.
Light! Light grey alert.

Code

<!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/4.5.2/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">

  <div class="alert alert-success">
    <strong>Success!</strong> This alert box could indicate a successful or positive action.
  </div>
  <div class="alert alert-info">
    <strong>Info!</strong> This alert box could indicate a neutral informative change or action.
  </div>
  <div class="alert alert-warning">
    <strong>Warning!</strong> This alert box could indicate a warning that might need attention.
  </div>
  <div class="alert alert-danger">
    <strong>Danger!</strong> This alert box could indicate a dangerous or potentially negative action.
  </div>
  <div class="alert alert-primary">
    <strong>Primary!</strong> Indicates an important action.
  </div>
  <div class="alert alert-secondary">
    <strong>Secondary!</strong> Indicates a slightly less important action.
  </div>
  <div class="alert alert-dark">
    <strong>Dark!</strong> Dark grey alert.
  </div>
  <div class="alert alert-light">
    <strong>Light!</strong> Light grey alert.
  </div>
</div>

</body>
</html>




Closing Alerts

For closing the alert we have to use .alert-dismissible in the class.

Code

<!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/4.5.2/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
 <div class="alert alert-success alert-dismissible">
    <button type="button" class="close" data-dismiss="alert">×</button>
    <strong>Success!</strong> This alert box could indicate a successful or positive action.
  </div>
  <div class="alert alert-info alert-dismissible">
    <button type="button" class="close" data-dismiss="alert">×</button>
    <strong>Info!</strong> This alert box could indicate a neutral informative change or action.
  </div>
  <div class="alert alert-warning alert-dismissible">
    <button type="button" class="close" data-dismiss="alert">×</button>
    <strong>Warning!</strong> This alert box could indicate a warning that might need attention.
  </div>
  <div class="alert alert-danger alert-dismissible">
    <button type="button" class="close" data-dismiss="alert">×</button>
    <strong>Danger!</strong> This alert box could indicate a dangerous or potentially negative action.
  </div>
  <div class="alert alert-primary alert-dismissible">
    <button type="button" class="close" data-dismiss="alert">×</button>
    <strong>Primary!</strong> Indicates an important action.
  </div>
  <div class="alert alert-secondary alert-dismissible">
    <button type="button" class="close" data-dismiss="alert">×</button>
    <strong>Secondary!</strong> Indicates a slightly less important action.
  </div>
  <div class="alert alert-dark alert-dismissible">
    <button type="button" class="close" data-dismiss="alert"> ×</button>
    <strong>Dark!</strong> Dark grey alert.
  </div>
  <div class="alert alert-light alert-dismissible">
    <button type="button" class="close" data-dismiss="alert">×</button>
    <strong>Light!</strong> Light grey alert.
  </div>
</div>

</body>
</html>