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Bootstrap 4 Alerts


Bootstrap 4 Alerts

Bootstrap 4 provides an easy way to create predefined alert messages:

Success! This alert box indicates a successful or positive action.
Info! This alert box indicates a neutral informative change or action.
Warning! This alert box indicates a warning that might need attention.
Danger! This alert box indicates a dangerous or potentially negative action.
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 .alert-success, .alert-info, .alert-warning, .alert-danger, .alert-primary, .alert-secondary, .alert-light or .alert-dark:

Example

<div class="alert alert-success">
  <strong>Success!</strong> Indicates a successful or positive action.
</div>
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Alert Links

Add the alert-link class to any links inside the alert box to create "matching colored links":

Success! You should read this message.
Info! You should read this message.
Warning! You should read this message.
Danger! You should read this message.
Primary! You should read this message.
Secondary! You should read this message.
Dark! You should read this message.
Light! You should read this message.

Example

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

× Click on the "x" symbol to the right to close me.

To close the alert message, add a .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 this the alert box will disappear).

Example

<div class="alert alert-success alert-dismissable">
  <button type="button" class="close" data-dismiss="alert">&times;</button>
  <strong>Success!</strong> Indicates a successful or positive action.
</div>
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Tip: &times; (×) is an HTML entity that is the preferred icon for close buttons, rather than the letter "x".


Animated Alerts

× Click on the "x" symbol to the right to close me. I will "fade" out.

The .fade and .show classes adds a fading effect when closing the alert message:

Example

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