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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<a href="/bootstrap-material-design/docs/4.0/getting-started/introduction/">
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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<a href="/bootstrap-material-design/docs/4.0/getting-started/javascript/">
JavaScript
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Theming
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Build tools
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Webpack
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Accessibility
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Layout
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Overview
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Grid
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Media object
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Utilities for layout
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Content
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Reboot
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Typography
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Code
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Images
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Tables
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Figures
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Material Design
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/buttons/">
Buttons
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Collapse inline
</a>
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/drawers/">
Drawers
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/extensions/">
Extensions
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<a href="/bootstrap-material-design/docs/4.0/material-design/forms/">
Forms
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Labels
</a>
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/list-groups/">
List groups
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<a href="/bootstrap-material-design/docs/4.0/material-design/menus/">
Menus
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Navs
</a>
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/selections/">
Selections
</a>
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/material-design/snackbars/">
Snackbars
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Bootstrap Components
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/alerts/">
Alerts
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Badge
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<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/breadcrumb/">
Breadcrumb
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Buttons
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<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/button-group/">
Button group
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<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/card/">
Card
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<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/carousel/">
Carousel
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Collapse
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<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/dropdowns/">
Dropdowns
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</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/forms/">
Forms
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/input-group/">
Input group
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/jumbotron/">
Jumbotron
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/list-group/">
List group
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/modal/">
Modal
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/navs/">
Navs
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/navbar/">
Navbar
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/pagination/">
Pagination
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/popovers/">
Popovers
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/progress/">
Progress
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/scrollspy/">
Scrollspy
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/bootstrap-components/tooltips/">
Tooltips
</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/approach/">
Extend
</a>
<ul class="nav bd-sidenav">
<li class="">
<a href="/bootstrap-material-design/docs/4.0/extend/approach/">
Approach
</a>
</li>
<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>
<div class="bd-toc-item ">
<a class="bd-toc-link" href="/bootstrap-material-design/docs/4.0/about/overview/">
About
</a>
<ul class="nav bd-sidenav">
<li class="">
<a href="/bootstrap-material-design/docs/4.0/about/overview/">
Overview
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/about/brand/">
Brand
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/about/license/">
License
</a>
</li>
<li class="">
<a href="/bootstrap-material-design/docs/4.0/about/translations/">
Translations
</a>
</li>
</ul>
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</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>
<ul>
<ul>
<ul>
<li class="toc-entry toc-h5"><a href="#escaping-selectors">Escaping selectors</a></li>
</ul>
</ul>
</ul>
</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>
<ul>
<li class="toc-entry toc-h5"><a href="#third-party-libraries">Third-party libraries</a></li>
</ul>
</ul>
</ul>
</li>
<li class="toc-entry toc-h2"><a href="#util">Util</a></li>
<li class="toc-entry toc-h2"><a href="#dynamically-generated-elements">Dynamically generated elements</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-material-design.js</code> or the minified <code class="highlighter-rouge">bootstrap-material-design.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/mdbootstrap/blob/v4.1.1/package.json">Consult our <code class="highlighter-rouge">package.json</code></a> to see which versions of jQuery are supported.</p>
<p>Our dropdowns, popovers and tooltips also depend on <a href="https://popper.js.org/">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>
<div class="bd-callout bd-callout-warning">
<h5 id="escaping-selectors">Escaping selectors</h5>
<p>If you use special selectors, for example: <code class="highlighter-rouge">collapse:Example</code>, be sure to escape them, because theyll be passed through jQuery.</p>
</div>
<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; "4.1.1"</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">
<h5 id="third-party-libraries">Third-party libraries</h5>
<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 Bootstraps JavaScript files depend on <code class="highlighter-rouge">util.js</code> and it has to be included alongside the other JavaScript files. If youre using the compiled (or minified) <code class="highlighter-rouge">bootstrap-material-design.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>
<h2 id="dynamically-generated-elements">Dynamically generated elements</h2>
<p>If you use Material Design for Bootstrap on a project handled by Angular, React or other frameworks
that dynamically generate and append new elements to the document, youll need to manually
call the Material Design for Bootstrap javascript functions to initialize new elements such
as inputs.</p>
<p>Alternatively, you can include <a href="https://github.com/uzairfarooq/arrive">arrive.js</a> before the MDB
javascript to automatically initialize any dynamically generated element.</p>
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