Bootstrap 3 Tutorial

Bootstrap 3 Alerts

Last modified on: October 28, 2024

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<h3>Bootstrap 3: Alerts</h3>
<p>In Bootstrap 3, <strong>Alerts</strong> are used to display important messages in a visually distinct box with color-coded backgrounds based on the alert type. Alerts are perfect for notifying users about important actions, warnings, success messages, or errors.</p>
<hr />
<h3>Basic Alert Structure</h3>
<p>To create an alert, use the <code>.alert</code> class on a <code>&lt;div&gt;</code> element along with an appropriate contextual class:</p>
<ul>
<li><code>.alert-success</code> - For success messages</li>
<li><code>.alert-info</code> - For informational messages</li>
<li><code>.alert-warning</code> - For warnings</li>
<li><code>.alert-danger</code> - For error messages</li>
</ul>
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<pre class="language-markup"><code>&lt;div class="alert alert-success"&gt;
    &lt;strong&gt;Success!&lt;/strong&gt; Your operation was successful.
&lt;/div&gt;
&lt;div class="alert alert-info"&gt;
    &lt;strong&gt;Info!&lt;/strong&gt; This is an informational alert.
&lt;/div&gt;
&lt;div class="alert alert-warning"&gt;
    &lt;strong&gt;Warning!&lt;/strong&gt; Please check your input.
&lt;/div&gt;
&lt;div class="alert alert-danger"&gt;
    &lt;strong&gt;Error!&lt;/strong&gt; Something went wrong.
&lt;/div&gt;
</code></pre>
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<p><strong>Result</strong>: Each alert type is visually distinct with colors indicating its purpose (green for success, blue for info, yellow for warning, and red for danger).</p>
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<h3>Dismissible Alerts</h3>
<p>Bootstrap 3 allows you to make alerts dismissible with the addition of the <code>.alert-dismissible</code> class. This includes a close button (<code>&lt;button&gt;</code>) to allow users to remove the alert from view.</p>
<p>To make an alert dismissible, add the <code>.alert-dismissible</code> class and include a close button with the <code>data-dismiss="alert"</code> attribute.</p>
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<pre class="language-markup"><code>&lt;div class="alert alert-warning alert-dismissible"&gt;
    &lt;button type="button" class="close" data-dismiss="alert" aria-label="Close"&gt;&amp;times;&lt;/button&gt;
    &lt;strong&gt;Warning!&lt;/strong&gt; You can close this alert.
&lt;/div&gt;
</code></pre>
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<p><strong>Result</strong>: The alert appears with a close button (<code>&times;</code>) on the right side, allowing users to dismiss it by clicking.</p>
<hr />
<h3>Example with Multiple Alerts</h3>
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<pre class="language-markup"><code>&lt;!DOCTYPE html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
    &lt;meta charset="UTF-8"&gt;
    &lt;meta name="viewport" content="width=device-width, initial-scale=1"&gt;
    &lt;title&gt;Bootstrap 3 Alerts Example&lt;/title&gt;
    &lt;link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"&gt;
&lt;/head&gt;
&lt;body&gt;

&lt;div class="container"&gt;
    &lt;h2&gt;Bootstrap 3 Alerts&lt;/h2&gt;

&lt;!-- Success Alert --&gt;
    &lt;div class="alert alert-success"&gt;
        &lt;strong&gt;Success!&lt;/strong&gt; This is a success message.
    &lt;/div&gt;

&lt;!-- Info Alert --&gt;
    &lt;div class="alert alert-info"&gt;
        &lt;strong&gt;Info!&lt;/strong&gt; This is an informational alert.
    &lt;/div&gt;

&lt;!-- Warning Alert --&gt;
    &lt;div class="alert alert-warning alert-dismissible"&gt;
        &lt;button type="button" class="close" data-dismiss="alert" aria-label="Close"&gt;&amp;times;&lt;/button&gt;
        &lt;strong&gt;Warning!&lt;/strong&gt; This is a dismissible warning alert.
    &lt;/div&gt;

&lt;!-- Danger Alert --&gt;
    &lt;div class="alert alert-danger"&gt;
        &lt;strong&gt;Error!&lt;/strong&gt; This is an error message.
    &lt;/div&gt;
&lt;/div&gt;

&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"&gt;&lt;/script&gt;
&lt;script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"&gt;&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>
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<h3>&nbsp;</h3>
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