Bootstrap Alert Styles

Intro

The alerts are created by all of these components you even do not remember till you extremely get to require them. They are taken for providing prompt in time comments for the user having interaction with the website hopefully aiming his or hers attention to a specific course or evoking special actions.

The alerts are most frequently used together with forms to give the user a idea if a field has been submitted incorrectly, which is the effective format expected or which is the condition of the submission once the submit button has been pressed.

As a lot of the elements in the Bootstrap framework the alerts also do have a nice predefined look and semantic classes which are used according to the particular condition where the Bootstrap Alert Message has been shown on screen. Due to the fact that it's an alert text message it's important to grab user's interest but however keep him in the zone of comfort nevertheless it might even be an error notification.

This gets accomplished due to the use of delicate toned colors each being intuitively connected to the semantic of the message material like green for Success, Light Blue for regular info, Pale yellow aiming for user's attention and Mild red identifying there is really something wrong.

<div class="alert alert-success" role="alert">
  <strong>Well done!</strong> You successfully read this important alert message.
</div>
<div class="alert alert-info" role="alert">
  <strong>Heads up!</strong> This alert needs your attention, but it's not super important.
</div>
<div class="alert alert-warning" role="alert">
  <strong>Warning!</strong> Better check yourself, you're not looking too good.
</div>
<div class="alert alert-danger" role="alert">
  <strong>Oh snap!</strong> Change a few things up and try submitting again.
</div>

Color tone of the web link

This may not be noticed at a glance but the font color tone itself is in fact following this coloration as well-- just the colors are much much darker so get unconsciously takened as black but the truth is it's not exactly so.

Same goes not only for the alert text message itself but even for the links provided in it-- there are link classes getting rid of the outline and painting the anchor elements in the appropriate colour so they match the overall alert text message look.

<div class="alert alert-success" role="alert">
  <strong>Well done!</strong> You successfully read <a href="#" class="alert-link">this important alert message</a>.
</div>
<div class="alert alert-info" role="alert">
  <strong>Heads up!</strong> This <a href="#" class="alert-link">alert needs your attention</a>, but it's not super important.
</div>
<div class="alert alert-warning" role="alert">
  <strong>Warning!</strong> Better check yourself, you're <a href="#" class="alert-link">not looking too good</a>.
</div>
<div class="alert alert-danger" role="alert">
  <strong>Oh snap!</strong> <a href="#" class="alert-link">Change a few things up</a> and try submitting again.
</div>

Extra important information for alerts

A detail to consider-- the color options bring their obvious interpretation only for those who really get to notice them. It's a good thing to either make sure the visible text itself carries the meaning of the

alert well enough or to eventually add some additional descriptions to only be seen by the screen readers in order to grant the page's accessibility.

In addition to links and basic HTML tags like strong as an example the alert elements in Bootstrap 4 can also contain Headings and paragraphs for the situations when you need to display a bit longer content.

<div class="alert alert-success" role="alert">
  <h4 class="alert-heading">Well done!</h4>
  <p>Aww yeah, you successfully read this important alert message. This example text is going to run a bit longer so that you can see how spacing within an alert works with this kind of content.</p>
  <p class="mb-0">Whenever you need to, be sure to use margin utilities to keep things nice and tidy.</p>
</div>

Dismiss the alert

You can also provide an X icon to dismiss the alert and include a cool transition to it to one more time provide the visual pleasure of the Bootstrap Alert Warning visitors.

<div class="alert alert-warning alert-dismissible fade show" role="alert">
  <button type="button" class="close" data-dismiss="alert" aria-label="Close">
    <span aria-hidden="true">×</span>
  </button>
  <strong>Holy guacamole!</strong> You should check in on some of those fields below.
</div>

Currently there are four kinds of contextual alert messages in Bootstrap 4 framework - they are knowned as Success, Info, Warning and Danger. Don't allow however their names to narrow down the manner you are actually working with them-- all of these are simply a number of color schemes and the way they will be actually implemented in your website is absolutely up to you and completely depends on the individual case.

-- if the color scheme of your page utilizes the red as main color it might be quite appropriate to display the alert for successful form submission in red too using the predefined alert danger appearance in order to better blend with the page and save some time defining your own classes.

The predefined alert classes are just some consistent appearances and the responsibility for using them lays entirely on the designer's shoulders.

JavaScript behaviour of the Bootstrap Alert Box

Triggers

Enable removal of an alert by using JavaScript

$(".alert").alert()

Enable termination of an alert through JavaScript

Alternatively with information attributes on a button in the alert, as indicated above

<button type="button" class="close" data-dismiss="alert" aria-label="Close">
  <span aria-hidden="true">×</span>
</button>

Note that shutting off an alert will remove it from the DOM.

Techniques

$().alert() - Helps to make an alert listen for mouse click events on descendant elements which have the data-dismiss=" alert" attribute. (Not necessary in case making use of the data-api's auto-initialization.).

$().alert('close') - Turns off an alert simply by eliminating it from the DOM. If the.fade and.show classes are present on the element, the alert will die before it is taken out.