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Paul O’Shannessy
546 lines
24 KiB
HTML
546 lines
24 KiB
HTML
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<h3>Reference</h3>
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<ul>
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<li>
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<a href="/react/docs/top-level-api.html" class="active">
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Top-Level API
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Component API
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<a href="/react/docs/events.html">
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Event System
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<a href="/react/docs/dom-differences.html">
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DOM Differences
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<a href="/react/docs/special-non-dom-attributes.html">
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Special Non-DOM Attributes
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Reconciliation
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</div>
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<div class="nav-docs-section">
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<h3>Flux</h3>
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<ul>
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<li>
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<a href="/react/docs/flux-overview.html">
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Flux Overview
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</a>
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<li>
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<a href="/react/docs/flux-todo-list.html">
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Flux TodoMVC Tutorial
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</a>
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</li>
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</div>
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<!-- Tips Nav -->
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<h3>Tips</h3>
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<ul>
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<li>
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<a href="/react/tips/introduction.html">Introduction</a>
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</li>
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<li>
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<a href="/react/tips/inline-styles.html">Inline Styles</a>
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</li>
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<li>
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<a href="/react/tips/if-else-in-JSX.html">If-Else in JSX</a>
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</li>
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<li>
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<a href="/react/tips/self-closing-tag.html">Self-Closing Tag</a>
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</li>
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<li>
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<a href="/react/tips/maximum-number-of-jsx-root-nodes.html">Maximum Number of JSX Root Nodes</a>
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</li>
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<li>
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<a href="/react/tips/style-props-value-px.html">Shorthand for Specifying Pixel Values in style props</a>
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</li>
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<li>
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<a href="/react/tips/children-props-type.html">Type of the Children props</a>
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</li>
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<li>
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<a href="/react/tips/controlled-input-null-value.html">Value of null for Controlled Input</a>
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</li>
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<li>
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<a href="/react/tips/componentWillReceiveProps-not-triggered-after-mounting.html">componentWillReceiveProps Not Triggered After Mounting</a>
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</li>
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<li>
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<a href="/react/tips/props-in-getInitialState-as-anti-pattern.html">Props in getInitialState Is an Anti-Pattern</a>
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</li>
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<li>
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<a href="/react/tips/dom-event-listeners.html">DOM Event Listeners in a Component</a>
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</li>
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<li>
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<a href="/react/tips/initial-ajax.html">Load Initial Data via AJAX</a>
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</li>
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<li>
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<a href="/react/tips/false-in-jsx.html">False in JSX</a>
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</li>
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<li>
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<a href="/react/tips/communicate-between-components.html">Communicate Between Components</a>
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</li>
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<li>
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<a href="/react/tips/expose-component-functions.html">Expose Component Functions</a>
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</li>
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<li>
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<a href="/react/tips/references-to-components.html">References to Components</a>
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</li>
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<li>
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<a href="/react/tips/children-undefined.html">this.props.children undefined</a>
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</li>
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</ul>
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</div>
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</div>
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<div class="inner-content">
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<h1>
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Top-Level API
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<a class="edit-page-link" href="https://github.com/facebook/react/tree/master/docs/docs/ref-01-top-level-api.md" target="_blank">Edit on GitHub</a>
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</h1>
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<div class="subHeader"></div>
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<h2><a class="anchor" name="react"></a>React <a class="hash-link" href="#react">#</a></h2>
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<p><code>React</code> is the entry point to the React framework. If you're using one of the prebuilt packages it's available as a global; if you're using CommonJS modules you can <code>require()</code> it.</p>
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<h3><a class="anchor" name="react.createclass"></a>React.createClass <a class="hash-link" href="#react.createclass">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="kd">function</span> <span class="nx">createClass</span><span class="p">(</span><span class="nx">object</span> <span class="nx">specification</span><span class="p">)</span>
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</code></pre></div>
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<p>Create a component given a specification. A component implements a <code>render</code> method which returns <strong>one single</strong> child. That child may have an arbitrarily deep child structure. One thing that makes components different than standard prototypal classes is that you don't need to call new on them. They are convenience wrappers that construct backing instances (via new) for you.</p>
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<p>For more information about the specification object, see <a href="/react/docs/component-specs.html">Component Specs and Lifecycle</a>.</p>
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<h3><a class="anchor" name="react.rendercomponent"></a>React.renderComponent <a class="hash-link" href="#react.rendercomponent">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="nx">ReactComponent</span> <span class="nx">renderComponent</span><span class="p">(</span>
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<span class="nx">ReactComponent</span> <span class="nx">component</span><span class="p">,</span>
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<span class="nx">DOMElement</span> <span class="nx">container</span><span class="p">,</span>
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<span class="p">[</span><span class="kd">function</span> <span class="nx">callback</span><span class="p">]</span>
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<span class="p">)</span>
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</code></pre></div>
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<p>Render a React component into the DOM in the supplied <code>container</code> and return a reference to the component.</p>
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<p>If the React component was previously rendered into <code>container</code>, this will perform an update on it and only mutate the DOM as necessary to reflect the latest React component.</p>
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<p>If the optional callback is provided, it will be executed after the component is rendered or updated.</p>
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<blockquote>
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<p>Note:</p>
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<p><code>React.renderComponent()</code> replaces the contents of the container node you
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pass in. In the future, it may be possible to insert a component to an
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existing DOM node without overwriting the existing children.</p>
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</blockquote>
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<h3><a class="anchor" name="react.unmountcomponentatnode"></a>React.unmountComponentAtNode <a class="hash-link" href="#react.unmountcomponentatnode">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="kr">boolean</span> <span class="nx">unmountComponentAtNode</span><span class="p">(</span><span class="nx">DOMElement</span> <span class="nx">container</span><span class="p">)</span>
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</code></pre></div>
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<p>Remove a mounted React component from the DOM and clean up its event handlers and state. If no component was mounted in the container, calling this function does nothing. Returns <code>true</code> if a component was unmounted and <code>false</code> if there was no component to unmount.</p>
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<h3><a class="anchor" name="react.rendercomponenttostring"></a>React.renderComponentToString <a class="hash-link" href="#react.rendercomponenttostring">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="nx">string</span> <span class="nx">renderComponentToString</span><span class="p">(</span><span class="nx">ReactComponent</span> <span class="nx">component</span><span class="p">)</span>
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</code></pre></div>
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<p>Render a component to its initial HTML. This should only be used on the server. React will return an HTML string. You can use this method to generate HTML on the server and send the markup down on the initial request for faster page loads and to allow search engines to crawl your pages for SEO purposes.</p>
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<p>If you call <code>React.renderComponent()</code> on a node that already has this server-rendered markup, React will preserve it and only attach event handlers, allowing you to have a very performant first-load experience.</p>
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<h3><a class="anchor" name="react.rendercomponenttostaticmarkup"></a>React.renderComponentToStaticMarkup <a class="hash-link" href="#react.rendercomponenttostaticmarkup">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="nx">string</span> <span class="nx">renderComponentToStaticMarkup</span><span class="p">(</span><span class="nx">ReactComponent</span> <span class="nx">component</span><span class="p">)</span>
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</code></pre></div>
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<p>Similar to <code>renderComponentToString</code>, except this doesn't create extra DOM attributes such as <code>data-react-id</code>, that React uses internally. This is useful if you want to use React as a simple static page generator, as stripping away the extra attributes can save lots of bytes.</p>
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<h3><a class="anchor" name="react.isvalidclass"></a>React.isValidClass <a class="hash-link" href="#react.isvalidclass">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="kr">boolean</span> <span class="nx">isValidClass</span><span class="p">(</span><span class="o">*</span> <span class="nx">factory</span><span class="p">)</span>
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</code></pre></div>
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<p>Verifies the factory is a React class descriptor. See <code>React.createClass</code>.</p>
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<h3><a class="anchor" name="react.isvalidcomponent"></a>React.isValidComponent <a class="hash-link" href="#react.isvalidcomponent">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="kr">boolean</span> <span class="nx">isValidComponent</span><span class="p">(</span><span class="o">*</span> <span class="nx">object</span><span class="p">)</span>
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</code></pre></div>
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<p>Verifies the object is a React component descriptor.</p>
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<h3><a class="anchor" name="react.dom"></a>React.DOM <a class="hash-link" href="#react.dom">#</a></h3>
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<p><code>React.DOM</code> provides all of the standard HTML tags needed to build a React app. You generally don't use it directly; instead, just include it as part of the <code>/** @jsx React.DOM */</code> docblock.</p>
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<h3><a class="anchor" name="react.proptypes"></a>React.PropTypes <a class="hash-link" href="#react.proptypes">#</a></h3>
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<p><code>React.PropTypes</code> includes types that can be used with a component's <code>propTypes</code> object to validate props being passed to your components. For more information about <code>propTypes</code>, see <a href="/react/docs/reusable-components.html">Reusable Components</a>.</p>
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<h3><a class="anchor" name="react.initializetouchevents"></a>React.initializeTouchEvents <a class="hash-link" href="#react.initializetouchevents">#</a></h3><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="nx">initializeTouchEvents</span><span class="p">(</span><span class="kr">boolean</span> <span class="nx">shouldUseTouch</span><span class="p">)</span>
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</code></pre></div>
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<p>Configure React's event system to handle touch events on mobile devices.</p>
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<h3><a class="anchor" name="react.children"></a>React.Children <a class="hash-link" href="#react.children">#</a></h3>
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<p><code>React.Children</code> provides utilities for dealing with the <code>this.props.children</code> opaque data structure.</p>
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<h4><a class="anchor" name="react.children.map"></a>React.Children.map <a class="hash-link" href="#react.children.map">#</a></h4><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="nx">object</span> <span class="nx">React</span><span class="p">.</span><span class="nx">Children</span><span class="p">.</span><span class="nx">map</span><span class="p">(</span><span class="nx">object</span> <span class="nx">children</span><span class="p">,</span> <span class="kd">function</span> <span class="nx">fn</span> <span class="p">[,</span> <span class="nx">object</span> <span class="nx">context</span><span class="p">])</span>
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</code></pre></div>
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<p>Invoke <code>fn</code> on every immediate child contained within <code>children</code> with <code>this</code> set to <code>context</code>. If <code>children</code> is a nested object or array it will be traversed: <code>fn</code> will never be passed the container objects. If children is <code>null</code> or <code>undefined</code> returns <code>null</code> or <code>undefined</code> rather than an empty object.</p>
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<h4><a class="anchor" name="react.children.foreach"></a>React.Children.forEach <a class="hash-link" href="#react.children.foreach">#</a></h4><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="nx">React</span><span class="p">.</span><span class="nx">Children</span><span class="p">.</span><span class="nx">forEach</span><span class="p">(</span><span class="nx">object</span> <span class="nx">children</span><span class="p">,</span> <span class="kd">function</span> <span class="nx">fn</span> <span class="p">[,</span> <span class="nx">object</span> <span class="nx">context</span><span class="p">])</span>
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</code></pre></div>
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<p>Like <code>React.Children.map()</code> but does not return an object.</p>
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<h4><a class="anchor" name="react.children.count"></a>React.Children.count <a class="hash-link" href="#react.children.count">#</a></h4><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="nx">number</span> <span class="nx">React</span><span class="p">.</span><span class="nx">Children</span><span class="p">.</span><span class="nx">count</span><span class="p">(</span><span class="nx">object</span> <span class="nx">children</span><span class="p">)</span>
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</code></pre></div>
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<p>Return the total number of components in <code>children</code>, equal to the number of times that a callback passed to <code>map</code> or <code>forEach</code> would be invoked.</p>
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<h4><a class="anchor" name="react.children.only"></a>React.Children.only <a class="hash-link" href="#react.children.only">#</a></h4><div class="highlight"><pre><code class="language-javascript" data-lang="javascript"><span class="nx">object</span> <span class="nx">React</span><span class="p">.</span><span class="nx">Children</span><span class="p">.</span><span class="nx">only</span><span class="p">(</span><span class="nx">object</span> <span class="nx">children</span><span class="p">)</span>
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</code></pre></div>
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|
<p>Return the only child in <code>children</code>. Throws otherwise.</p>
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