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twbs--bootstrap/docs/components/alerts.md

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---
layout: page
title: Alerts
---
Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages. For inline dismissal, use the [alerts jQuery plugin]({{ site.baseurl }}javascript/#alerts).
Wrap any text and an optional dismiss button in `.alert` and one of the four contextual classes (e.g., `.alert-success`) for basic alert messages.
<div class="bd-callout bd-callout-info">
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<h4>No default class</h4>
<p>Alerts don't have default classes, only base and modifier classes. A default gray alert doesn't make too much sense, so you're required to specify a type via contextual class. Choose from success, info, warning, or danger.</p>
</div>
{% example html %}
<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>
{% endexample %}
### Dismissing
Build on any alert by adding an optional `.alert-dismissible` and [close button]().
{% example html %}
<div class="alert alert-warning alert-dismissible" role="alert">
Merge branch 'master' into v4 Conflicts: Gruntfile.js dist/css/bootstrap-theme.css dist/css/bootstrap-theme.css.map dist/css/bootstrap-theme.min.css dist/css/bootstrap.css dist/css/bootstrap.css.map dist/css/bootstrap.min.css dist/js/bootstrap.min.js docs/_data/glyphicons.yml docs/_includes/components/alerts.html docs/_includes/components/badges.html docs/_includes/components/breadcrumbs.html docs/_includes/components/button-dropdowns.html docs/_includes/components/button-groups.html docs/_includes/components/dropdowns.html docs/_includes/components/glyphicons.html docs/_includes/components/input-groups.html docs/_includes/components/jumbotron.html docs/_includes/components/labels.html docs/_includes/components/list-group.html docs/_includes/components/media.html docs/_includes/components/navbar.html docs/_includes/components/navs.html docs/_includes/components/page-header.html docs/_includes/components/pagination.html docs/_includes/components/panels.html docs/_includes/components/progress-bars.html docs/_includes/components/responsive-embed.html docs/_includes/components/thumbnails.html docs/_includes/components/wells.html docs/_includes/css/buttons.html docs/_includes/css/code.html docs/_includes/css/forms.html docs/_includes/css/grid.html docs/_includes/css/helpers.html docs/_includes/css/images.html docs/_includes/css/less.html docs/_includes/css/tables.html docs/_includes/css/type.html docs/_includes/customizer-variables.html docs/_includes/getting-started/accessibility.html docs/_includes/getting-started/disabling-responsiveness.html docs/_includes/getting-started/download.html docs/_includes/getting-started/whats-included.html docs/_includes/js/alerts.html docs/_includes/js/buttons.html docs/_includes/js/carousel.html docs/_includes/js/collapse.html docs/_includes/js/modal.html docs/_includes/js/overview.html docs/_includes/js/popovers.html docs/_includes/js/tabs.html docs/_includes/js/tooltips.html docs/_includes/nav/components.html docs/_includes/nav/javascript.html docs/_jade/customizer-variables.jade docs/_layouts/default.html docs/about.html docs/assets/css/docs.min.css docs/assets/css/src/docs.css docs/assets/js/customize.min.js docs/assets/js/raw-files.min.js docs/assets/js/src/customizer.js docs/customize.html docs/dist/css/bootstrap-theme.css.map docs/dist/css/bootstrap.css docs/dist/css/bootstrap.css.map docs/dist/css/bootstrap.min.css less/glyphicons.less less/mixins/vendor-prefixes.less less/navbar.less less/popovers.less less/tables.less less/theme.less less/tooltip.less less/variables.less package.json scss/_carousel.scss scss/_close.scss scss/_forms.scss test-infra/npm-shrinkwrap.json
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<button type="button" class="close" data-dismiss="alert" aria-label="Close">
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<span aria-hidden="true">&times;</span>
<span class="sr-only">Close</span>
</button>
<strong>Warning!</strong> Better check yourself, you're not looking too good.
</div>
{% endexample %}
<div class="bd-callout bd-callout-warning">
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<h4>Ensure proper behavior across all devices</h4>
<p>Be sure to use the <code>&lt;button&gt;</code> element with the <code>data-dismiss="alert"</code> data attribute.</p>
</div>
### Link color
Use the `.alert-link` utility class to quickly provide matching colored links within any alert.
{% example html %}
<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>
{% endexample %}
## Examples
{% example html %}
<div class="alert alert-warning alert-dismissible fade in" role="alert">
<button type="button" class="close" data-dismiss="alert" aria-label="Close">
<span aria-hidden="true">&times;</span>
<span class="sr-only">Close</span>
</button>
<strong>Holy guacamole!</strong> Best check yo self, you're not looking too good.
</div>
{% endexample %}
When using a `.close` button, it must be the first child of the `.alert-dismissible` and no text content may come before it in the markup.
{% example html %}
<div class="alert alert-danger alert-dismissible fade in" role="alert">
<button type="button" class="close" data-dismiss="alert"><span aria-hidden="true">&times;</span><span class="sr-only">Close</span></button>
<h5 class="alert-heading">Sorry, something went wrong.</h5>
<p>Change this and that and try again. Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum.</p>
<p>
<button type="button" class="btn btn-danger">Take this action</button>
<button type="button" class="btn btn-secondary">Or do this</button>
</p>
</div>
{% endexample %}
## Usage
Enable dismissal of an alert via JavaScript:
{% highlight js %}
$(".alert").alert()
{% endhighlight %}
### Markup
Just add `data-dismiss="alert"` to your close button to automatically give an alert close functionality. Closing an alert removes it from the DOM.
{% highlight html %}
<button type="button" class="close" data-dismiss="alert" aria-label="Close">
<span aria-hidden="true">&times;</span>
<span class="sr-only">Close</span>
</button>
{% endhighlight %}
To have your alerts use animation when closing, make sure they have the `.fade` and `.in` classes already applied to them.
### Methods
#### $().alert()
Makes an alert listen for click events on descendant elements which have the `data-dismiss="alert"` attribute. (Not necessary when using the data-api's auto-initialization.)
#### $().alert('close')
Closes an alert by removing it from the DOM. If the `.fade` and `.in` classes are present on the element, the alert will fade out before it is removed.
{% highlight js %}$(".alert").alert('close'){% endhighlight %}
### Events
Bootstrap's alert plugin exposes a few events for hooking into alert functionality.
<div class="table-responsive">
<table class="table table-bordered table-striped">
<thead>
<tr>
<th style="width: 150px;">Event Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td>close.bs.alert</td>
<td>This event fires immediately when the <code>close</code> instance method is called.</td>
</tr>
<tr>
<td>closed.bs.alert</td>
<td>This event is fired when the alert has been closed (will wait for CSS transitions to complete).</td>
</tr>
</tbody>
</table>
</div>
{% highlight js %}
$('#myAlert').on('closed.bs.alert', function () {
// do something…
})
{% endhighlight %}