947 lines
63 KiB
HTML
947 lines
63 KiB
HTML
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<title>React.js (v0.14) cheatsheet</title>
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<li class="facebook link hint--bottom" data-hint="Share on Facebook"><a href="https://www.facebook.com/sharer/sharer.php?u=https://devhints.io/react@0.14.html" target="share"><span class="text"></span></a></li>
|
||
<li class="twitter link hint--bottom" data-hint="Share on Twitter"><a href="https://twitter.com/intent/tweet?text=The%20ultimate%20cheatsheet%20for%20React.js%20(v0.14).%20https://devhints.io/react@0.14.html" target="share"><span class="text"></span></a></li>
|
||
|
||
</ul>
|
||
|
||
|
||
|
||
<ul class='page-actions'>
|
||
<li class='link github -button hint--bottom' data-hint='Edit this page on GitHub'>
|
||
<a href='https://github.com/rstacruz/cheatsheets/blob/master/react@0.14.md'>
|
||
<span class='text -visible'>Edit</span>
|
||
</a>
|
||
</li>
|
||
</ul>
|
||
|
||
</div>
|
||
|
||
</div>
|
||
</nav>
|
||
|
||
|
||
<div class='body-area'>
|
||
<header class='main-heading -center' role='banner'>
|
||
<h1 class='h1'>React.js (v0.14) <em>cheatsheet</em></h1>
|
||
|
||
<div class='pubbox' data-js-no-preview>
|
||
|
||
<div class='HeadlinePub' role='complementary'>
|
||
<script async src='https://pubsrv.devhints.io/carbon.js?serve=CE7IK5QM&placement=devhintsio&cd=pubsrv.devhints.io/s' id="_carbonads_js"></script>
|
||
<span class='placeholder -one'></span>
|
||
<span class='placeholder -two'></span>
|
||
<span class='placeholder -three'></span>
|
||
<span class='placeholder -four'></span>
|
||
</div>
|
||
|
||
|
||
</div>
|
||
</header>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<div class='intro-content MarkdownBody'>
|
||
<p><strong>Deprecated:</strong> this guide targets an old version of React (v0.14). See the <a href="react">updated React cheatsheet</a> for new versions.</p>
|
||
|
||
</div>
|
||
|
||
|
||
<main class='post-content MarkdownBody' data-js-main-body data-js-anchors role='main'>
|
||
|
||
<h3 id="components">Components</h3>
|
||
|
||
<pre><code class="language-js">var Component = React.createClass({
|
||
render: function () {
|
||
return <div>Hello {this.props.name}</div>;
|
||
}
|
||
});
|
||
</code></pre>
|
||
|
||
<pre class="light"><code class="language-js">ReactDOM.render(<Component name="John" />, document.body);
|
||
</code></pre>
|
||
|
||
<p>Use the <a href="http://jsfiddle.net/reactjs/69z2wepo/">React.js jsfiddle</a> to start hacking. (or the unofficial <a href="http://jsbin.com/yafixat/edit?js,output">jsbin</a>)</p>
|
||
|
||
<h3 id="nesting">Nesting</h3>
|
||
|
||
<pre class="light"><code class="language-js">var UserAvatar = React.createClass({...});
|
||
var UserProfile = React.createClass({...});
|
||
</code></pre>
|
||
|
||
<pre><code class="language-js">var Info = React.createClass({
|
||
render() {
|
||
return <div>
|
||
<UserAvatar src={this.props.avatar} />
|
||
<UserProfile username={this.props.username} />
|
||
</div>;
|
||
}
|
||
});
|
||
</code></pre>
|
||
|
||
<p>Nest components to separate concerns. See <a href="http://facebook.github.io/react/docs/multiple-components.html">multiple components</a>.</p>
|
||
|
||
<h2 class="center" id="states--properties">States & Properties</h2>
|
||
|
||
<h3 id="states-and-props">States and props</h3>
|
||
|
||
<pre class="light"><code class="language-html"><MyComponent fullscreen={true} />
|
||
</code></pre>
|
||
|
||
<pre><code class="language-js">// props
|
||
this.props.fullscreen //=> true
|
||
|
||
// state
|
||
this.setState({ username: 'rstacruz' });
|
||
this.replaceState({ ... });
|
||
this.state.username //=> 'rstacruz'
|
||
</code></pre>
|
||
|
||
<pre><code class="language-js">render: function () {
|
||
return <div className={this.props.fullscreen ? 'full' : ''}>
|
||
Welcome, {this.state.username}
|
||
</div>;
|
||
}
|
||
</code></pre>
|
||
|
||
<p>Use <a href="https://facebook.github.io/react/docs/tutorial.html#using-props">props</a> (<code>this.props</code>) to access parameters passed from the parent.
|
||
Use <a href="https://facebook.github.io/react/docs/tutorial.html#reactive-state">states</a> (<code>this.state</code>) to manage dynamic data.</p>
|
||
|
||
<h3 id="setting-defaults">Setting defaults</h3>
|
||
|
||
<pre><code class="language-js">React.createClass({
|
||
getInitialState: function () {
|
||
return { comments: [] };
|
||
},
|
||
|
||
getDefaultProps: function () {
|
||
return { name: "Hello" };
|
||
}
|
||
);
|
||
</code></pre>
|
||
|
||
<p>Pre-populates <code>this.state.comments</code> and <code>this.props.name</code>.</p>
|
||
|
||
<h2 id="components-1">Components</h2>
|
||
|
||
<h3 id="component-api">Component API</h3>
|
||
|
||
<pre class="light"><code class="language-js">ReactDOM.findDOMNode(c) // 0.14+
|
||
React.findDOMNode(c) // 0.13
|
||
c.getDOMNode() // 0.12 below
|
||
</code></pre>
|
||
|
||
<pre><code class="language-js">c.forceUpdate()
|
||
c.isMounted()
|
||
|
||
c.state
|
||
c.props
|
||
|
||
c.setState({ ... })
|
||
c.replaceState({ ... })
|
||
|
||
c.setProps({ ... }) // for deprecation
|
||
c.replaceProps({ ... }) // for deprecation
|
||
|
||
c.refs
|
||
</code></pre>
|
||
|
||
<p>These are methods available for <code>Component</code> instances. See <a href="http://facebook.github.io/react/docs/component-api.html">Component API</a>.</p>
|
||
|
||
<h3 id="component-specs">Component specs</h3>
|
||
|
||
<table class="greycode no-head">
|
||
<thead>
|
||
<tr>
|
||
<th>Method</th>
|
||
<th>What</th>
|
||
</tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr>
|
||
<td><a href="http://facebook.github.io/react/docs/component-specs.html#render"><code>render()</code></a></td>
|
||
<td> </td>
|
||
</tr>
|
||
</tbody>
|
||
<tbody>
|
||
<tr>
|
||
<td><a href="http://facebook.github.io/react/docs/component-specs.html#getinitialstate"><code>getInitialState()</code></a></td>
|
||
<td> </td>
|
||
</tr>
|
||
<tr>
|
||
<td><a href="http://facebook.github.io/react/docs/component-specs.html#getdefaultprops"><code>getDefaultProps()</code></a></td>
|
||
<td> </td>
|
||
</tr>
|
||
</tbody>
|
||
<tbody>
|
||
<tr>
|
||
<td><a href="http://facebook.github.io/react/docs/component-specs.html#mixins"><code>mixins: [ ... ]</code></a></td>
|
||
<td>Mixins … <a href="#mixins">more</a></td>
|
||
</tr>
|
||
<tr>
|
||
<td><a href="http://facebook.github.io/react/docs/component-specs.html#proptypes"><code>propTypes: { ... }</code></a></td>
|
||
<td>Validation … <a href="#property-validation">more</a></td>
|
||
</tr>
|
||
<tr>
|
||
<td><a href="http://facebook.github.io/react/docs/component-specs.html#statics"><code>statics: { ... }</code></a></td>
|
||
<td>Static methods</td>
|
||
</tr>
|
||
<tr>
|
||
<td><a href="http://facebook.github.io/react/docs/component-specs.html#displayname"><code>displayName: "..."</code></a></td>
|
||
<td>Automatically filled by JSX</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
|
||
<p>Methods and properties you can override. See <a href="http://facebook.github.io/react/docs/component-specs.html">component specs</a>.</p>
|
||
|
||
<h2 id="lifecycle">Lifecycle</h2>
|
||
|
||
<h3 id="mounting">Mounting</h3>
|
||
|
||
<table class="greycode no-head lc">
|
||
<tbody>
|
||
<tr>
|
||
<td><code>componentWillMount()</code></td>
|
||
<td>Before rendering (no DOM yet)</td>
|
||
</tr>
|
||
<tr>
|
||
<td><code>componentDidMount()</code></td>
|
||
<td>After rendering</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
|
||
<p>Before initial rendering occurs. Add your DOM stuff on didMount (events, timers, etc). See <a href="http://facebook.github.io/react/docs/component-specs.html#mounting-componentwillmount">reference</a>.</p>
|
||
|
||
<h3 id="updating">Updating</h3>
|
||
|
||
<table class="greycode no-head lc">
|
||
<tbody>
|
||
<tr>
|
||
<td><code>componentWillReceiveProps</code><em>(newProps={})</em></td>
|
||
<td>Use <code>setState()</code> here</td>
|
||
</tr>
|
||
<tr>
|
||
<td><code>shouldComponentUpdate</code><em>(newProps={}, newState={})</em></td>
|
||
<td>Skips <code>render()</code> if returns false</td>
|
||
</tr>
|
||
<tr>
|
||
<td><code>componentWillUpdate</code><em>(newProps={}, newState={})</em></td>
|
||
<td>Can’t use <code>setState()</code> here</td>
|
||
</tr>
|
||
<tr>
|
||
<td><code>componentDidUpdate</code><em>(prevProps={}, prevState={})</em></td>
|
||
<td>Operate on the DOM here</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
|
||
<p>Called when parents change properties and <code>.setState()</code>. These are not called for initial renders. See <a href="http://facebook.github.io/react/docs/component-specs.html#updating-componentwillreceiveprops">reference</a>.</p>
|
||
|
||
<h3 id="unmounting">Unmounting</h3>
|
||
|
||
<table class="greycode no-head lc">
|
||
<tbody>
|
||
<tr>
|
||
<td><code>componentWillUnmount()</code></td>
|
||
<td>Invoked before DOM removal</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
|
||
<p>Clear your DOM stuff here (probably done on didMount). See <a href="http://facebook.github.io/react/docs/component-specs.html#unmounting-componentwillunmount">reference</a>.</p>
|
||
|
||
<h2 id="examples">Examples</h2>
|
||
|
||
<h3 id="example-loading-data">Example: loading data</h3>
|
||
|
||
<pre><code class="language-js">React.createClass({
|
||
componentDidMount: function () {
|
||
$.get(this.props.url, function (data) {
|
||
this.setState(data);
|
||
}.bind(this));
|
||
},
|
||
|
||
render: function () {
|
||
return <CommentList data={this.state.data} />
|
||
}
|
||
});
|
||
</code></pre>
|
||
|
||
<p>See <a href="http://facebook.github.io/react/tips/initial-ajax.html">initial AJAX data</a>.</p>
|
||
|
||
<h2 id="dom-nodes">DOM nodes</h2>
|
||
|
||
<h3 id="references">References</h3>
|
||
|
||
<pre class="light"><code class="language-html"><input ref="myInput">
|
||
</code></pre>
|
||
|
||
<pre><code class="language-js">this.refs.myInput
|
||
ReactDOM.findDOMNode(this.refs.myInput).focus()
|
||
ReactDOM.findDOMNode(this.refs.myInput).value
|
||
</code></pre>
|
||
|
||
<h3 id="dom-events">DOM Events</h3>
|
||
<p>Add attributes like <code>onChange</code>. See <a href="https://facebook.github.io/react/docs/events.html">events</a>.</p>
|
||
|
||
<pre class="light"><code class="language-html"><input type="text"
|
||
value={this.state.value}
|
||
onChange={this.handleChange} />
|
||
</code></pre>
|
||
|
||
<pre><code class="language-js">handleChange: function(event) {
|
||
this.setState({ value: event.target.value });
|
||
}
|
||
</code></pre>
|
||
|
||
<p>Allows access to DOM nodes. See <a href="http://facebook.github.io/react/docs/more-about-refs.html">References</a>.</p>
|
||
|
||
<h3 id="two-way-binding">Two-way binding</h3>
|
||
|
||
<pre class="light"><code class="language-html">Email: <input type="text" valueLink={this.linkState('email')} />
|
||
</code></pre>
|
||
|
||
<pre><code class="language-js">React.createClass({
|
||
mixins: [React.addons.LinkedStateMixin]
|
||
});
|
||
</code></pre>
|
||
|
||
<pre><code class="language-js">this.state.email
|
||
</code></pre>
|
||
|
||
<p>Use <a href="http://facebook.github.io/react/docs/two-way-binding-helpers.html">LinkedStateMixin</a> for easier two-way binding.</p>
|
||
|
||
<h2 id="property-validation">Property validation</h2>
|
||
|
||
<h3 id="basic-types">Basic types</h3>
|
||
|
||
<pre><code class="language-js">React.createClass({
|
||
propTypes: {
|
||
email: React.PropTypes.string,
|
||
seats: React.PropTypes.number,
|
||
settings: React.PropTypes.object,
|
||
callback: React.PropTypes.func,
|
||
isClosed: React.PropTypes.bool,
|
||
any: React.PropTypes.any,
|
||
}
|
||
});
|
||
</code></pre>
|
||
<p>Primitive types: <code>.string</code>, <code>.number</code>, <code>.func</code>, and <code>.bool</code>. See <a href="http://facebook.github.io/react/docs/reusable-components.html#prop-validation">propTypes</a>.</p>
|
||
|
||
<h3 id="required-types">Required types</h3>
|
||
|
||
<pre><code class="language-js">propTypes: {
|
||
requiredFunc: React.PropTypes.func.isRequired,
|
||
requiredAny: React.PropTypes.any.isRequired,
|
||
</code></pre>
|
||
|
||
<p>Add <code>.isRequired</code>.</p>
|
||
|
||
<h3 id="react-elements">React elements</h3>
|
||
|
||
<pre><code class="language-js">propTypes: {
|
||
element: React.PropTypes.element, // react element
|
||
node: React.PropTypes.node, // num, string, element
|
||
// ...or array of those
|
||
</code></pre>
|
||
|
||
<p>Use <code>.element</code>, <code>.node</code>.</p>
|
||
|
||
<h3 id="enumerables">Enumerables</h3>
|
||
|
||
<pre><code>propTypes: {
|
||
enum: React.PropTypes.oneOf(['M','F']), // enum
|
||
union: React.PropTypes.oneOfType([ // any
|
||
React.PropTypes.string,
|
||
React.PropTypes.number ]),
|
||
</code></pre>
|
||
|
||
<p>Use <code>.oneOf</code>, <code>.oneOfType</code>.</p>
|
||
|
||
<h3 id="arrays-and-objects">Arrays and objects</h3>
|
||
|
||
<pre><code class="language-js">propTypes: {
|
||
array: React.PropTypes.array,
|
||
arrayOf: React.PropTypes.arrayOf(React.PropTypes.number),
|
||
object: React.PropTypes.object,
|
||
objectOf: React.PropTypes.objectOf(React.PropTypes.number),
|
||
|
||
message: React.PropTypes.instanceOf(Message),
|
||
|
||
object2: React.PropTypes.shape({
|
||
color: React.PropTypes.string,
|
||
size: React.PropTypes.number
|
||
}),
|
||
</code></pre>
|
||
|
||
<p>Use <code>.array[Of]</code>, <code>.object[Of]</code>, <code>.instanceOf</code>, <code>.shape</code>.</p>
|
||
|
||
<h3 id="custom-validation">Custom validation</h3>
|
||
|
||
<pre><code class="language-js">propTypes: {
|
||
customProp: function(props, propName, componentName) {
|
||
if (!/matchme/.test(props[propName])) {
|
||
return new Error('Validation failed!');
|
||
}
|
||
}
|
||
}
|
||
</code></pre>
|
||
|
||
<p>Supply your own function.</p>
|
||
|
||
<h2 id="other-features">Other features</h2>
|
||
|
||
<h3 id="class-set">Class set</h3>
|
||
|
||
<pre><code class="language-js">var cx = require('classnames');
|
||
|
||
render: function() {
|
||
var classes = cx({
|
||
'message': true,
|
||
'message-important': this.props.isImportant,
|
||
'message-read': this.props.isRead
|
||
});
|
||
|
||
return <div className={classes}>Great Scott!</div>;
|
||
}
|
||
</code></pre>
|
||
|
||
<p>Manipulate DOM classes with <a href="https://www.npmjs.org/package/classnames">classnames</a>, previously known as <code>React.addons.classSet</code>. See <a href="http://facebook.github.io/react/docs/class-name-manipulation.html">Class set</a>.</p>
|
||
|
||
<h3 id="propagating-properties">Propagating properties</h3>
|
||
|
||
<pre class="light"><code class="language-html"><VideoPlayer src="video.mp4" />
|
||
</code></pre>
|
||
|
||
<pre><code class="language-js">var VideoPlayer = React.createClass({
|
||
render: function() {
|
||
/* propagates src="..." down to this sub component */
|
||
return <VideoEmbed {...this.props} controls='false' />;
|
||
}
|
||
});
|
||
</code></pre>
|
||
|
||
<p>See <a href="http://facebook.github.io/react/docs/transferring-props.html">Transferring props</a>.</p>
|
||
|
||
<h3 id="mixins">Mixins</h3>
|
||
|
||
<pre class="light"><code class="language-js">var SetIntervalMixin = {
|
||
componentWillMount: function() { .. }
|
||
}
|
||
</code></pre>
|
||
|
||
<pre><code class="language-js">var TickTock = React.createClass({
|
||
mixins: [SetIntervalMixin]
|
||
}
|
||
</code></pre>
|
||
|
||
<p>See <a href="https://facebook.github.io/react/docs/addons.html">addons</a> for some built-in mixins.</p>
|
||
|
||
<h2 id="top-level-api"><a href="https://facebook.github.io/react/docs/top-level-api.html">Top level API</a></h2>
|
||
|
||
<pre><code class="language-js">React.createClass({ ... })
|
||
|
||
React.isValidElement(c)
|
||
|
||
ReactDOM.findDOMNode(c) // 0.14+
|
||
ReactDOM.render(<Component />, domnode, [callback]) // 0.14+
|
||
ReactDOM.unmountComponentAtNode(domnode) // 0.14+
|
||
|
||
ReactDOMServer.renderToString(<Component />) // 0.14+
|
||
ReactDOMServer.renderToStaticMarkup(<Component />) // 0.14+
|
||
</code></pre>
|
||
|
||
<h2 id="jsx-patterns">JSX patterns</h2>
|
||
|
||
<h3 id="style-shorthand">Style shorthand</h3>
|
||
|
||
<pre><code class="language-js">var style = { backgroundImage: 'url(x.jpg)', height: 10 };
|
||
return <div style={style}></div>;
|
||
</code></pre>
|
||
|
||
<p>See <a href="https://facebook.github.io/react/tips/inline-styles.html">inline styles</a>.</p>
|
||
|
||
<h3 id="innerhtml">InnerHTML</h3>
|
||
|
||
<pre><code class="language-js">function markdownify() { return "<p>...</p>"; }
|
||
<div dangerouslySetInnerHTML={{__html: markdownify()}} />
|
||
</code></pre>
|
||
|
||
<p>See <a href="https://facebook.github.io/react/tips/dangerously-set-inner-html.html">dangerously set innerHTML</a>.</p>
|
||
|
||
<h3 id="lists">Lists</h3>
|
||
|
||
<pre><code class="language-js">var TodoList = React.createClass({
|
||
render: function() {
|
||
function item(itemText) {
|
||
return <li>{itemText}</li>;
|
||
};
|
||
return <ul>{this.props.items.map(item)}</ul>;
|
||
}
|
||
});
|
||
</code></pre>
|
||
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<h2 id="see-also">See also</h2>
|
||
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||
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|
||
<li><a href="http://facebook.github.io/react/docs/animation.html">Animations</a></li>
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