My Blog

Bootstrap Alerts

—

by

Awais Farooq
in

Bootstrap Alerts are used to provide an easy way to create predefined alert messages. Alert adds a style to your messages to make it more appealing to the users.

There are four classes that are used within <div> element for alerts.

  • .alert-success
  • .alert-info
  • .alert-warning
  • .alert-danger

Bootstrap Alert Example

<!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/3.3.6/css/bootstrap.min.css">  

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>  

  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>  

</head>  

<body>  

  

<div class="container">  

  <h2>Alerts</h2>  

  <div class="alert alert-success">  

    <strong>Success!</strong> This alert box indicates a successful or positive action.  

  </div>  

  <div class="alert alert-info">  

    <strong>Info!</strong> This alert box indicates a neutral informative change or action.  

  </div>  

  <div class="alert alert-warning">  

    <strong>Warning!</strong> This alert box indicates a warning that might need attention.  

  </div>  

  <div class="alert alert-danger">  

    <strong>Danger!</strong> This alert box indicates a dangerous or potentially negative action.  

</div>  

</div>  

  

</body>  

</html>

Bootstrap4 Alert

Bootstrap 4 adds 4 new alerts in Bootstrap Alert defined in Bootstrap 3 tutorial.

These are:

  • Primary: This alert box indicates an important action.
  • Secondary: This alert box indicates a less important action.
  • Dark: Dark grey alert box.
  • Light: Light grey alert box.

Alerts are created with the .alert class, followed by one of the contextual classes.

List of all contextual classes:

  • .alert-success
  • .alert-info
  • .alert-warning
  • .alert-danger
  • .alert-primary
  • .alert-secondary
  • .alert-light
  • .alert-dark

Example

<!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/4.0.0-beta.2/css/bootstrap.min.css">  

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>  

  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.6/umd/popper.min.js"></script>  

  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>  

</head>  

<body>  

  

<div class="container">  

  <h2>Alerts</h2>  

  <div class="alert alert-success">  

    <strong>Success!</strong> Used to indicate successful or positive action.  

  </div>  

  <div class="alert alert-info">  

    <strong>Info!</strong> Used to indicate a neutral informative change or action.  

  </div>  

  <div class="alert alert-warning">  

    <strong>Warning!</strong> Used to indicate a warning that might need attention.  

  </div>  

  <div class="alert alert-danger">  

    <strong>Danger!</strong> Used to indicate a dangerous or potentially negative action.  

  </div>  

  <div class="alert alert-primary">  

    <strong>Primary!</strong> Used to indicate an important action.  

  </div>  

  <div class="alert alert-secondary">  

    <strong>Secondary!</strong> Used to indicate 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> 

Alert Links

You have to add the alert-link class to any links inside the alert box to create “matching colored links”:

Example:

<!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/4.0.0-beta.2/css/bootstrap.min.css">  

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>  

  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.6/umd/popper.min.js"></script>  

  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>  

</head>  

<body>  

  

<div class="container">  

  <h2>Bootstrap Alert Links</h2>  

  <div class="alert alert-success">  

    <strong>Success!</strong> You should <a href="#" class="alert-link">read this message</a>.  

  </div>  

  <div class="alert alert-info">  

    <strong>Info!</strong> You should <a href="#" class="alert-link">read this message</a>.  

  </div>  

  <div class="alert alert-warning">  

    <strong>Warning!</strong> You should <a href="#" class="alert-link">read this message</a>.  

  </div>  

  <div class="alert alert-danger">  

    <strong>Danger!</strong> You should <a href="#" class="alert-link">read this message</a>.  

  </div>  

  <div class="alert alert-primary">  

    <strong>Primary!</strong> You should <a href="#" class="alert-link">read this message</a>.  

  </div>  

  <div class="alert alert-secondary">  

    <strong>Secondary!</strong> You should <a href="#" class="alert-link">read this message</a>.  

  </div>  

  <div class="alert alert-dark">  

    <strong>Dark!</strong> You should <a href="#" class="alert-link">read this message</a>.  

  </div>  

  <div class="alert alert-light">  

    <strong>Light!</strong> You should <a href="#" class="alert-link">read this message</a>.  

  </div>  

</div>  

  

</body>  

</html> 

Closing Alerts

If you want to close the alert message, you have to add an .alert-dismissable class to the alert container. Then add class=”close” and data-dismiss=”alert” to a link or a button element (when you click on the close sign, the alert box will be closed.)

Example:

<!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/4.0.0-beta.2/css/bootstrap.min.css">  

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>  

  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.6/umd/popper.min.js"></script>  

  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>  

</head>  

<body>  

  

<div class="container">  

  <h2>Alerts</h2>  

  <div class="alert alert-success alert-dismissable">  

    <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-dismissable">  

    <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-dismissable">  

    <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-dismissable">  

    <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-dismissable">  

    <button type="button" class="close" data-dismiss="alert">×</button>  

    <strong>Primary!</strong> Indicates an important action.  

  </div>  

  <div class="alert alert-secondary alert-dismissable">  

    <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-dismissable">  

    <button type="button" class="close" data-dismiss="alert">×</button>  

    <strong>Dark!</strong> Dark grey alert.  

  </div>  

  <div class="alert alert-light alert-dismissable">  

    <button type="button" class="close" data-dismiss="alert">×</button>  

    <strong>Light!</strong> Light grey alert.  

  </div>  

</div>  

  

</body>  

</html> 

Animated Alerts

You can use .fade and .show classes to add a fading effect when closing the alert message. Example:

<!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/4.0.0-beta.2/css/bootstrap.min.css">  

  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>  

  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.6/umd/popper.min.js"></script>  

  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js"></script>  

</head>  

<body>  

  

<div class="container">  

  <h2>Animated Alerts Example</h2>  

  <div class="alert alert-success alert-dismissable fade show">  

    <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-dismissable fade show">  

    <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-dismissable fade show">  

    <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-dismissable fade show">  

    <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-dismissable fade show">  

    <button type="button" class="close" data-dismiss="alert">×</button>  

    <strong>Primary!</strong> Indicates an important action.  

  </div>  

  <div class="alert alert-secondary alert-dismissable fade show">  

    <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-dismissable fade show">  

    <button type="button" class="close" data-dismiss="alert">×</button>  

    <strong>Dark!</strong> Dark grey alert.  

  </div>  

  <div class="alert alert-light alert-dismissable fade show">  

    <button type="button" class="close" data-dismiss="alert">×</button>  

    <strong>Light!</strong> Light grey alert.  

  </div>  

</div>  

  

</body>  

</html>

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