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Bootstrap 4 Alerts

Bootstrap 4 alert messages provide interactive information to users. These alert messages used for form validations and throwing messages on the browser. There are 8 types of alert boxes in bootstrap 4 using the following contextual classes.
  • .alert-primary: These classes are used to create an alert with primary color.
  • .alert-secondary: These classes are used to create an alert with secondary.
  • .alert-success: These classes are used to create an alert with light green to indicate a positive action.
  • .alert-info: These classes are used to create an alert Information message in sky-blue color.
  • .alert-danger: These classes are used to create alert Messages for danger, stop or negative actions.
  • .alert-warning: These classes are used to indicative warning messages.
  • .alert-light: These classes are used to indicative lighter messages.
  • .alert-dark: These classes are used to indicative darker messages.

Example:

<div class="alert alert-success"> Success alert </div>
<div class="alert alert-info"> Info alert </div>
<div class="alert alert-warning"> Warning alert </div>
<div class="alert alert-danger"> Danger alert </div>
<div class="alert alert-light"> Light alert </div>
<div class="alert alert-dark"> Dark alert </div>
Try it

Dismissible Alerts:

Generally, you will require closing the alerts by user action like using the ‘X’ symbol or automatically closing the alert after a certain interval.
The .alert-dismissible class is used within the .container class to close the alert messages. You also require including a button element with class=”close” and data-dismiss=“alert” attribute.

Example:

<div class="alert alert-success alert-dismissible">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Success alert </div>
<div class="alert alert-info alert-dismissible">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Info alert </div>
<div class="alert alert-warning alert-dismissible">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Warning alert </div>
<div class="alert alert-danger alert-dismissible">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Danger alert </div>
<div class="alert alert-light alert-dismissible">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Light alert </div>
<div class="alert alert-dark alert-dismissible">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Dark alert </div>
Try it

Fading Effect:

By using .fade and .show classes, you can add the fading effect of animation when closing the alert message.

Example:

<div class="alert alert-success alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Success alert </div>
<div class="alert alert-info alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Info alert </div>
<div class="alert alert-warning alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Warning alert </div>
<div class="alert alert-danger alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Danger alert </div>
<div class="alert alert-light alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Light alert </div>
<div class="alert alert-dark alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Dark alert </div>
Try it

Alerts with Links:

You simply need using one class in the links within alert i.e. .alert-link and it will make the link similar color (a little darker) as the color of contextual alert.

Example:

<div class="alert alert-success alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Success alert <a href="#" class="alert-link"> read this text </a>

</div>

<div class="alert alert-info alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Info alert <a href="#" class="alert-link"> read this text </a>

</div>

<div class="alert alert-warning alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Warning alert <a href="#" class="alert-link"> read this text </a>

</div>

<div class="alert alert-danger alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Danger alert <a href="#" class="alert-link"> read this text </a>

</div>

<div class="alert alert-light alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Light alert <a href="#" class="alert-link"> read this text </a>

</div>

<div class="alert alert-dark alert-dismissible fade show">
<button type="button" class="close" data-dismiss="alert"> &times; </button>
Dark alert <a href="#" class="alert-link"> read this text </a>

</div>

Try it

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