mdb-ui-kit/docs/4.0/getting-started/javascript/index.html
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JavaScript &middot; Bootstrap Material Design
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<a class="bd-toc-link" href="/bootstrap-material-design/docs/4.0/getting-started/introduction/">
Getting started
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Introduction
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Download
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Contents
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<a href="/bootstrap-material-design/docs/4.0/getting-started/browsers-devices/">
Browsers & devices
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<li class="active bd-sidenav-active">
<a href="/bootstrap-material-design/docs/4.0/getting-started/javascript/">
JavaScript
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<a href="/bootstrap-material-design/docs/4.0/getting-started/options/">
Options
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Build tools
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<a href="/bootstrap-material-design/docs/4.0/getting-started/webpack/">
Webpack
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Accessibility
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<a class="bd-toc-link" href="/bootstrap-material-design/docs/4.0/layout/overview/">
Layout
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/layout/overview/">
Overview
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Grid
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/layout/media-object/">
Media object
</a>
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/layout/utilities-for-layout/">
Utilities for layout
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<a class="bd-toc-link" href="/bootstrap-material-design/docs/4.0/content/reboot/">
Content
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/content/reboot/">
Reboot
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<a href="/bootstrap-material-design/docs/4.0/content/typography/">
Typography
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/content/code/">
Code
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<a href="/bootstrap-material-design/docs/4.0/content/images/">
Images
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/content/tables/">
Tables
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<a href="/bootstrap-material-design/docs/4.0/content/figures/">
Figures
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Components
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/alerts/">
Alerts
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/badge/">
Badge
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/breadcrumb/">
Breadcrumb
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/buttons/">
Buttons
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/button-group/">
Button group
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/card/">
Card
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</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/carousel/">
Carousel
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/collapse/">
Collapse
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/dropdowns/">
Dropdowns
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/forms/">
Forms
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/input-group/">
Input group
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/jumbotron/">
Jumbotron
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/list-group/">
List group
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/modal/">
Modal
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/navs/">
Navs
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/navbar/">
Navbar
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/pagination/">
Pagination
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/popovers/">
Popovers
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/progress/">
Progress
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/scrollspy/">
Scrollspy
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/components/tooltips/">
Tooltips
</a>
</li>
</ul>
</div>
<div class="bd-toc-item ">
<a class="bd-toc-link" href="/bootstrap-material-design/docs/4.0/material-design/buttons/">
Material Design
</a>
<ul class="nav bd-sidenav">
<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/buttons/">
Buttons
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/collapse-inline/">
Collapse inline
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/drawers/">
Drawers
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/extensions/">
Extensions
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/forms/">
Forms
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/labels/">
Labels
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/list-groups/">
List groups
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/menus/">
Menus
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/navs/">
Navs
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/selections/">
Selections
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/snackbars/">
Snackbars
</a>
</li>
</ul>
</div>
<div class="bd-toc-item ">
<a class="bd-toc-link" href="/bootstrap-material-design/docs/4.0/utilities/borders/">
Utilities
</a>
<ul class="nav bd-sidenav">
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/borders/">
Borders
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/clearfix/">
Clearfix
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/close-icon/">
Close icon
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/colors/">
Colors
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/display/">
Display
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/embed/">
Embed
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/flex/">
Flex
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/float/">
Float
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/image-replacement/">
Image replacement
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/position/">
Position
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/screenreaders/">
Screenreaders
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/sizing/">
Sizing
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/spacing/">
Spacing
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/text/">
Text
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/vertical-align/">
Vertical align
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/utilities/visibility/">
Visibility
</a>
</li>
</ul>
</div>
<div class="bd-toc-item ">
<a class="bd-toc-link" href="/bootstrap-material-design/docs/4.0/extend/icons/">
Extend
</a>
<ul class="nav bd-sidenav">
<li class="">
<a href="/bootstrap-material-design/docs/4.0/extend/icons/">
Icons
</a>
</li>
</ul>
</div>
<div class="bd-toc-item ">
<a class="bd-toc-link" href="/bootstrap-material-design/docs/4.0/migration/">
Migration
</a>
<ul class="nav bd-sidenav">
</ul>
</div>
</nav>
</div>
<div class="d-none d-xl-block col-xl-2 bd-toc">
<ul class="section-nav">
<li class="toc-entry toc-h2"><a href="#individual-or-compiled">Individual or compiled</a></li>
<li class="toc-entry toc-h2"><a href="#dependencies">Dependencies</a></li>
<li class="toc-entry toc-h2"><a href="#data-attributes">Data attributes</a></li>
<li class="toc-entry toc-h2"><a href="#events">Events</a></li>
<li class="toc-entry toc-h2"><a href="#programmatic-api">Programmatic API</a>
<ul>
<li class="toc-entry toc-h3"><a href="#asynchronous-functions-and-transitions">Asynchronous functions and transitions</a></li>
<li class="toc-entry toc-h3"><a href="#default-settings">Default settings</a></li>
</ul>
</li>
<li class="toc-entry toc-h2"><a href="#no-conflict">No conflict</a></li>
<li class="toc-entry toc-h2"><a href="#version-numbers">Version numbers</a></li>
<li class="toc-entry toc-h2"><a href="#no-special-fallbacks-when-javascript-is-disabled">No special fallbacks when JavaScript is disabled</a>
<ul>
<ul>
<li class="toc-entry toc-h4"><a href="#third-party-libraries">Third-party libraries</a></li>
</ul>
</ul>
</li>
<li class="toc-entry toc-h2"><a href="#util">Util</a></li>
</ul>
</div>
<main class="col-12 col-md-9 col-xl-8 py-md-3 pl-md-5 bd-content" role="main">
<h1 class="bd-title" id="content">JavaScript</h1>
<p class="bd-lead">Bring Bootstrap to life with our optional JavaScript plugins built on jQuery. Learn about each plugin, our data and programmatic API options, and more.</p>
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<h2 id="individual-or-compiled">Individual or compiled</h2>
<p>Plugins can be included individually (using Bootstraps individual <code class="highlighter-rouge">*.js</code> files), or all at once using <code class="highlighter-rouge">bootstrap.js</code> or the minified <code class="highlighter-rouge">bootstrap.min.js</code> (dont include both).</p>
<h2 id="dependencies">Dependencies</h2>
<p>Some plugins and CSS components depend on other plugins. If you include plugins individually, make sure to check for these dependencies in the docs. Also note that <strong>all plugins depend on jQuery</strong> (this means jQuery must be included <strong>before</strong> the plugin files). <a href="https://github.com/FezVrasta/bootstrap-material-design/blob/v4.0.0-beta.3/bower.json">Consult our <code class="highlighter-rouge">bower.json</code></a> to see which versions of jQuery are supported.</p>
<p>Our tooltips and popovers also depend on <a href="https://github.com/FezVrasta/popper.js">Popper.js</a>.</p>
<h2 id="data-attributes">Data attributes</h2>
<p>Nearly all Bootstrap plugins can be enabled and configured through HTML alone with data attributes (our preferred way of using JavaScript functionality). Be sure to <strong>only use one set of data attributes on a single element</strong> (e.g., you cannot trigger a tooltip and modal from the same button.)</p>
<p>However, in some situations it may be desirable to disable this functionality. To disable the data attribute API, unbind all events on the document namespaced with <code class="highlighter-rouge">data-api</code> like so:</p>
<figure class="highlight"><pre><code class="language-js" data-lang="js"><span class="nx">$</span><span class="p">(</span><span class="nb">document</span><span class="p">).</span><span class="nx">off</span><span class="p">(</span><span class="s1">'.data-api'</span><span class="p">)</span></code></pre></figure>
<p>Alternatively, to target a specific plugin, just include the plugins name as a namespace along with the data-api namespace like this:</p>
<figure class="highlight"><pre><code class="language-js" data-lang="js"><span class="nx">$</span><span class="p">(</span><span class="nb">document</span><span class="p">).</span><span class="nx">off</span><span class="p">(</span><span class="s1">'.alert.data-api'</span><span class="p">)</span></code></pre></figure>
<h2 id="events">Events</h2>
<p>Bootstrap provides custom events for most plugins unique actions. Generally, these come in an infinitive and past participle form - where the infinitive (ex. <code class="highlighter-rouge">show</code>) is triggered at the start of an event, and its past participle form (ex. <code class="highlighter-rouge">shown</code>) is triggered on the completion of an action.</p>
<p>All infinitive events provide <a href="https://developer.mozilla.org/en-US/docs/Web/API/Event/preventDefault"><code class="highlighter-rouge">preventDefault()</code></a> functionality. This provides the ability to stop the execution of an action before it starts. Returning false from an event handler will also automatically call <code class="highlighter-rouge">preventDefault()</code>.</p>
<figure class="highlight"><pre><code class="language-js" data-lang="js"><span class="nx">$</span><span class="p">(</span><span class="s1">'#myModal'</span><span class="p">).</span><span class="nx">on</span><span class="p">(</span><span class="s1">'show.bs.modal'</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">e</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">data</span><span class="p">)</span> <span class="k">return</span> <span class="nx">e</span><span class="p">.</span><span class="nx">preventDefault</span><span class="p">()</span> <span class="c1">// stops modal from being shown</span>
<span class="p">})</span></code></pre></figure>
<h2 id="programmatic-api">Programmatic API</h2>
<p>We also believe you should be able to use all Bootstrap plugins purely through the JavaScript API. All public APIs are single, chainable methods, and return the collection acted upon.</p>
<figure class="highlight"><pre><code class="language-js" data-lang="js"><span class="nx">$</span><span class="p">(</span><span class="s1">'.btn.danger'</span><span class="p">).</span><span class="nx">button</span><span class="p">(</span><span class="s1">'toggle'</span><span class="p">).</span><span class="nx">addClass</span><span class="p">(</span><span class="s1">'fat'</span><span class="p">)</span></code></pre></figure>
<p>All methods should accept an optional options object, a string which targets a particular method, or nothing (which initiates a plugin with default behavior):</p>
<figure class="highlight"><pre><code class="language-js" data-lang="js"><span class="nx">$</span><span class="p">(</span><span class="s1">'#myModal'</span><span class="p">).</span><span class="nx">modal</span><span class="p">()</span> <span class="c1">// initialized with defaults</span>
<span class="nx">$</span><span class="p">(</span><span class="s1">'#myModal'</span><span class="p">).</span><span class="nx">modal</span><span class="p">({</span> <span class="na">keyboard</span><span class="p">:</span> <span class="kc">false</span> <span class="p">})</span> <span class="c1">// initialized with no keyboard</span>
<span class="nx">$</span><span class="p">(</span><span class="s1">'#myModal'</span><span class="p">).</span><span class="nx">modal</span><span class="p">(</span><span class="s1">'show'</span><span class="p">)</span> <span class="c1">// initializes and invokes show immediately</span></code></pre></figure>
<p>Each plugin also exposes its raw constructor on a <code class="highlighter-rouge">Constructor</code> property: <code class="highlighter-rouge">$.fn.popover.Constructor</code>. If youd like to get a particular plugin instance, retrieve it directly from an element: <code class="highlighter-rouge">$('[rel="popover"]').data('popover')</code>.</p>
<h3 id="asynchronous-functions-and-transitions">Asynchronous functions and transitions</h3>
<p>All programmatic API methods are <strong>asynchronous</strong> and returns to the caller once the transition is started but <strong>before it ends</strong>.</p>
<p>In order to execute an action once the transition is complete, you can listen to the corresponding event.</p>
<figure class="highlight"><pre><code class="language-js" data-lang="js"><span class="nx">$</span><span class="p">(</span><span class="s1">'#myCollapse'</span><span class="p">).</span><span class="nx">on</span><span class="p">(</span><span class="s1">'shown.bs.collapse'</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">e</span><span class="p">)</span> <span class="p">{</span>
<span class="c1">// Action to execute once the collapsible area is expanded</span>
<span class="p">})</span></code></pre></figure>
<p>In addition a method call on a <strong>transitioning component will be ignored</strong>.</p>
<figure class="highlight"><pre><code class="language-js" data-lang="js"><span class="nx">$</span><span class="p">(</span><span class="s1">'#myCarousel'</span><span class="p">).</span><span class="nx">on</span><span class="p">(</span><span class="s1">'slid.bs.carousel'</span><span class="p">,</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">e</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">$</span><span class="p">(</span><span class="s1">'#myCarousel'</span><span class="p">).</span><span class="nx">carousel</span><span class="p">(</span><span class="s1">'2'</span><span class="p">)</span> <span class="c1">// Will slide to the slide 2 as soon as the transition to slide 1 is finished</span>
<span class="p">})</span>
<span class="nx">$</span><span class="p">(</span><span class="s1">'#myCarousel'</span><span class="p">).</span><span class="nx">carousel</span><span class="p">(</span><span class="s1">'1'</span><span class="p">)</span> <span class="c1">// Will start sliding to the slide 1 and returns to the caller</span>
<span class="nx">$</span><span class="p">(</span><span class="s1">'#myCarousel'</span><span class="p">).</span><span class="nx">carousel</span><span class="p">(</span><span class="s1">'2'</span><span class="p">)</span> <span class="c1">// !! Will be ignored, as the transition to the slide 1 is not finished !!</span></code></pre></figure>
<h3 id="default-settings">Default settings</h3>
<p>You can change the default settings for a plugin by modifying the plugins <code class="highlighter-rouge">Constructor.Default</code> object:</p>
<figure class="highlight"><pre><code class="language-js" data-lang="js"><span class="nx">$</span><span class="p">.</span><span class="nx">fn</span><span class="p">.</span><span class="nx">modal</span><span class="p">.</span><span class="nx">Constructor</span><span class="p">.</span><span class="nx">Default</span><span class="p">.</span><span class="nx">keyboard</span> <span class="o">=</span> <span class="kc">false</span> <span class="c1">// changes default for the modal plugin's `keyboard` option to false</span></code></pre></figure>
<h2 id="no-conflict">No conflict</h2>
<p>Sometimes it is necessary to use Bootstrap plugins with other UI frameworks. In these circumstances, namespace collisions can occasionally occur. If this happens, you may call <code class="highlighter-rouge">.noConflict</code> on the plugin you wish to revert the value of.</p>
<figure class="highlight"><pre><code class="language-js" data-lang="js"><span class="kd">var</span> <span class="nx">bootstrapButton</span> <span class="o">=</span> <span class="nx">$</span><span class="p">.</span><span class="nx">fn</span><span class="p">.</span><span class="nx">button</span><span class="p">.</span><span class="nx">noConflict</span><span class="p">()</span> <span class="c1">// return $.fn.button to previously assigned value</span>
<span class="nx">$</span><span class="p">.</span><span class="nx">fn</span><span class="p">.</span><span class="nx">bootstrapBtn</span> <span class="o">=</span> <span class="nx">bootstrapButton</span> <span class="c1">// give $().bootstrapBtn the Bootstrap functionality</span></code></pre></figure>
<h2 id="version-numbers">Version numbers</h2>
<p>The version of each of Bootstraps jQuery plugins can be accessed via the <code class="highlighter-rouge">VERSION</code> property of the plugins constructor. For example, for the tooltip plugin:</p>
<figure class="highlight"><pre><code class="language-js" data-lang="js"><span class="nx">$</span><span class="p">.</span><span class="nx">fn</span><span class="p">.</span><span class="nx">tooltip</span><span class="p">.</span><span class="nx">Constructor</span><span class="p">.</span><span class="nx">VERSION</span> <span class="c1">// =&gt; "4.0.0-beta.3"</span></code></pre></figure>
<h2 id="no-special-fallbacks-when-javascript-is-disabled">No special fallbacks when JavaScript is disabled</h2>
<p>Bootstraps plugins dont fall back particularly gracefully when JavaScript is disabled. If you care about the user experience in this case, use <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Element/noscript"><code class="highlighter-rouge">&lt;noscript&gt;</code></a> to explain the situation (and how to re-enable JavaScript) to your users, and/or add your own custom fallbacks.</p>
<div class="bd-callout bd-callout-warning">
<h4 id="third-party-libraries">Third-party libraries</h4>
<p><strong>Bootstrap does not officially support third-party JavaScript libraries</strong> like Prototype or jQuery UI. Despite <code class="highlighter-rouge">.noConflict</code> and namespaced events, there may be compatibility problems that you need to fix on your own.</p>
</div>
<h2 id="util">Util</h2>
<p>All Bootstrap Javascript depend on <code class="highlighter-rouge">util.js</code> and it has to be included alongside the other JS files. If youre using the compiled (or minified) <code class="highlighter-rouge">bootstrap.js</code>, there is no need to include this—its already there.</p>
<p><code class="highlighter-rouge">util.js</code> includes utility functions and a basic helper for <code class="highlighter-rouge">transitionEnd</code> events as well as a CSS transition emulator. Its used by the other plugins to check for CSS transition support and to catch hanging transitions.</p>
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