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react_cheatsheet.html
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<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
<style>
*{margin:0;padding:0;}
body {
font:13.34px helvetica,arial,freesans,clean,sans-serif;
color:black;
line-height:1.4em;
background-color: #F8F8F8;
padding: 0.7em;
}
p {
margin:1em 0;
line-height:1.5em;
}
table {
font-size:inherit;
font:100%;
margin:1em;
}
table th{border-bottom:1px solid #bbb;padding:.2em 1em;}
table td{border-bottom:1px solid #ddd;padding:.2em 1em;}
input[type=text],input[type=password],input[type=image],textarea{font:99% helvetica,arial,freesans,sans-serif;}
select,option{padding:0 .25em;}
optgroup{margin-top:.5em;}
pre,code{font:12px Monaco,"Courier New","DejaVu Sans Mono","Bitstream Vera Sans Mono",monospace;}
pre {
margin:1em 0;
font-size:12px;
background-color:#eee;
border:1px solid #ddd;
padding:5px;
line-height:1.5em;
color:#444;
overflow:auto;
-webkit-box-shadow:rgba(0,0,0,0.07) 0 1px 2px inset;
-webkit-border-radius:3px;
-moz-border-radius:3px;border-radius:3px;
}
pre code {
padding:0;
font-size:12px;
background-color:#eee;
border:none;
}
code {
font-size:12px;
background-color:#f8f8ff;
color:#444;
padding:0 .2em;
border:1px solid #dedede;
}
img{border:0;max-width:100%;}
abbr{border-bottom:none;}
a{color:#4183c4;text-decoration:none;}
a:hover{text-decoration:underline;}
a code,a:link code,a:visited code{color:#4183c4;}
h2,h3{margin:1em 0;}
h1,h2,h3,h4,h5,h6{border:0;}
h1{font-size:170%;border-top:4px solid #aaa;padding-top:.5em;margin-top:1.5em;}
h1:first-child{margin-top:0;padding-top:.25em;border-top:none;}
h2{font-size:150%;margin-top:1.5em;border-top:4px solid #e0e0e0;padding-top:.5em;}
h3{margin-top:1em;}
hr{border:1px solid #ddd;}
ul{margin:1em 0 1em 2em;}
ol{margin:1em 0 1em 2em;}
ul li,ol li{margin-top:.5em;margin-bottom:.5em;}
ul ul,ul ol,ol ol,ol ul{margin-top:0;margin-bottom:0;}
blockquote{margin:1em 0;border-left:5px solid #ddd;padding-left:.6em;color:#555;}
dt{font-weight:bold;margin-left:1em;}
dd{margin-left:2em;margin-bottom:1em;}
sup {
font-size: 0.83em;
vertical-align: super;
line-height: 0;
}
* {
-webkit-print-color-adjust: exact;
}
@media screen and (min-width: 914px) {
body {
width: 854px;
margin:0 auto;
}
}
@media print {
table, pre {
page-break-inside: avoid;
}
pre {
word-wrap: break-word;
}
}
</style>
<title>React Cheatsheet</title>
</head>
<body>
<h1>React Cheatsheet</h1>
<h2>入门</h2>
<p>使用<a href="http://jsfiddle.net/reactjs/69z2wepo/">React.js jsfiddle</a>开始Hack。(或者使用非官方的<a href="http://jsbin.com/yafixat/edit?js,output">jsbin</a>)</p>
<pre><code>var Component = React.createClass({
render: function() {
return <div>Hello {this.props.name}</div>;
}
});
ReactDOM.render(<Component name="John" />, document.body);
</code></pre>
<h2>嵌套</h2>
<p>使用嵌套组件分离关注点。查看<a href="http://facebook.github.io/react/docs/multiple-components.html">多组件</a></p>
<pre><code>var UserAvatar = React.createClass({ ... });
var UserProfile = React.createClass({ ... });
var Info = React.createClass({
render() {
return (
<div>
<UserAvatar src={this.props.avatar} />
<UserProfile username={this.props.username} />
</div>
);
}
});
</code></pre>
<h2>状态和属性</h2>
<p>使用<a href="https://facebook.github.io/react/docs/tutorial.html#using-props">props</a>(this.props)访问父类传递过来的参数。使用<a href="https://facebook.github.io/react/docs/tutorial.html#reactive-state">state</a>(this.state)管理动态数据。</p>
<pre><code><MyComponent fullscreen={true} />
//属性
this.props.fullscreen //=> true
//状态
this.setState({username: 'rstacruz'});
this.replaceState({ ... });
this.state.username //=> 'rstacruz'
render: function() {
return (
<div className={this.props.fullscreen ? 'full' : ''}>
Welcome, {this.state.username}
</div>
);
}
</code></pre>
<h3>设置默认值</h3>
<p>提前渲染this.state.comments和this.props.name。</p>
<pre><code>React.createClass({
getInitialState: function () {
return { comments: []};
}
getDefaultProps: function () {
return { name: "Hello"};
}
});
</code></pre>
<h2>组件API</h2>
<p>这些是组件实例可以访问的方法。查看<a href="http://facebook.github.io/react/docs/component-api.html">组件API</a>。</p>
<pre><code>ReactDOM.findDOMNode(c) // 0.14+
React.findDOMNode(c) // 0.13
c.getDOMNode() // 0.12 以下
c.forceUpdate()
c.isMounted()
c.state
c.props
c.setState({ ... })
c.replaceState({ ... })
c.setProps({ ... }) //废弃
c.replaceProps({ ... }) //废弃
c.refs
</code></pre>
<h3>组件规范</h3>
<p>你可以重写方法和属性。查看<a href="http://facebook.github.io/react/docs/component-specs.html">组件规范</a></p>
<pre><code>render()
getInitialState()
getDefaultProps()
mixins: [ ... ] 混入... [更多](http://ricostacruz.com/cheatsheets/react.html#mixins)
propTypes: { ... } 校验... [更多](http://ricostacruz.com/cheatsheets/react.html#property-validation)
statics: { ... } 静态方法
displayName: "..." JSX自动填充
</code></pre>
<h2>生命周期</h2>
<h3>挂载</h3>
<p>在初始化渲染之前。在didMount上加一些DOM之类的东西(events, timer之类)。查看<a href="http://facebook.github.io/react/docs/component-specs.html#mounting-componentwillmount">参考</a>。</p>
<pre><code>componentWillMount() 在渲染之前(还没有DOM)
componentDidMount() 在渲染之后
</code></pre>
<h3>更新</h3>
<p>当父类改变属性和调用.setState()时调用。这些不会在初始化渲染的时候调用。查看<a href="http://facebook.github.io/react/docs/component-specs.html#updating-componentwillreceiveprops">参考</a>。</p>
<pre><code>componentWillReceiveProps (newProps={}) 这里使用setState()
shouldComponentUpdate (newProps={}, newState={}) 如果返回false，不会调用render()
componentWillUpdate (newProps={} newState={}) 这里不能使用setState()
componentDidUpdate(preProps={}, preState={}) 这里在DOM上操作
</code></pre>
<h3>卸载</h3>
<p>这里清理DOM上的一些东西(可能在didMount上已经完成)。查看<a href="http://facebook.github.io/react/docs/component-specs.html#unmounting-componentwillunmount">参考</a>。</p>
<pre><code>componentWillUnmount() 在DOM移除之前调用
</code></pre>
<h3>示例: 加载数据</h3>
<p>查看<a href="http://facebook.github.io/react/tips/initial-ajax.html">初始化Ajax数据</a></p>
<pre><code>React.createClass({
componentWillMount: function () {
$.get(this.props.url, function (data) {
this.setState(data);
}.bind(this));
}
render: function () {
return <CommentList data={this.state.data} />
}
});
</code></pre>
<h2>DOM节点</h2>
<h3>参考</h3>
<p>允许访问DOM节点。 查看<a href="http://facebook.github.io/react/docs/more-about-refs.html">参考</a>。</p>
<pre><code><input ref="myInput" />
this.refs.myInput
ReactDOM.findDOMNode(this.refs.myInput).focus()
ReactDOM.findDOMNode(this.refs.myInput).value
</code></pre>
<h3>DOM事件</h3>
<p>增加类似onChange属性。查看<a href="https://facebook.github.io/react/docs/events.html">事件</a>。</p>
<pre><code><input type="text"
value={this.state.value}
onChange={this.handleChange} />
handleChange: function (event) {
this.setState({value: event.target.value});
}
</code></pre>
<h3>双向绑定</h3>
<p>使用<a href="http://facebook.github.io/react/docs/two-way-binding-helpers.html">LinkedStateMixin</a>轻松实现双向绑定。</p>
<pre><code>Email: <input type="email" valueLink={this.linkState('email')} />
React.createClass({
mixins: [React.addons.LinkedStateMixin]
});
this.state.email
</code></pre>
<h2>属性校验</h2>
<h3>基础类型</h3>
<p>原始类型: .string, .number, .func, 和 .bool。查看<a href="http://facebook.github.io/react/docs/reusable-components.html#prop-validation">propTypes</a>。</p>
<pre><code>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>
<h3>必填类型</h3>
<p>添加.isRequired。</p>
<pre><code>propTypes: {
requiredFunc: React.PropTypes.func.isRequired,
requiredAny: React.PropTypes.any.isRequired
}
</code></pre>
<h3>React元素</h3>
<p>使用.element, .node。</p>
<pre><code>propTypes: {
element: React.PropTypes.element, //react元素
node: React.PropTypes.node //num, string, element
// ...或者它们的数组
}
</code></pre>
<h3>枚举</h3>
<p>使用 .oneOf, .oneOfType。</p>
<pre><code>propTypes: {
enum: React.PropTypes.oneOf(['M', 'F']), //枚举
union: React.PropTypes.oneOfType([ //任何一个
React.PropTypes.string,
React.PropTypes.number
])
}
</code></pre>
<h3>数组和对象</h3>
<p>使用 .array[Of], .object[Of], .instanceOf, .shape。</p>
<pre><code>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>
<h3>自定义验证</h3>
<p>提供你自己的函数</p>
<pre><code>propTypes: {
customProp: function (props, propName, componentName) {
if (!/matchname/.test(props[propName])) {
return new Error('Validation failed!');
}
}
}
</code></pre>
<h2>其他特性</h2>
<h3>类集合</h3>
<p>使用classname操作DOM class。之前都知道使用React.addons.classSet。查看<a href="http://facebook.github.io/react/docs/class-name-manipulation.html">Class set</a>。</p>
<pre><code>var cx = require('classname');
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>
<h3>扩展属性</h3>
<p>查看<a href="http://facebook.github.io/react/docs/transferring-props.html">Transferring props</a>。</p>
<pre><code><VideoPlayer src="video.mp4" />
var VideoPlayer = React.createClass({
render: function () {
/* 将 src="..." 属性传递到它的子组件 */
return <VideoEmbed {...this.props} controls='false' />;
}
});
</code></pre>
<h3>Mixins</h3>
<p>在<a href="https://facebook.github.io/react/docs/addons.html">addons</a>中查看内建mixins。</p>
<pre><code>var SetIntervalMixin = {
componentWillMount: function () {
...
}
}
var TickTock = React.createClass({
mixins: [SetIntervalMixin]
});
</code></pre>
<h2>顶级API</h2>
<pre><code>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>JSX模式</h2>
<h3>Style简写</h3>
<p>查看<a href="https://facebook.github.io/react/tips/inline-styles.html">内联样式</a>。</p>
<pre><code>var style = {
backgroundImage: 'url(xxx.jpg)',
height: 10
};
return <div style={style}></div>;
</code></pre>
<h3>InnerHTML</h3>
<p>查看<a href="https://facebook.github.io/react/tips/dangerously-set-inner-html.html">dangerouslySetInnerHTML</a>。</p>
<pre><code>function markdownify() {
return "<p> ... </p>";
}
<div dangerouslySetInnerHTML={{__html: markdownify()}} />
</code></pre>
<h3>列表</h3>
<pre><code>var TodoList = React.createClass({
render: function () {
function item(itemText) {
return <li>{itemText}</li>;
}
return <ul>{this.props.items.map(item)}</ul>;
}
});
</code></pre>
<h2>可以查看</h2>
<p><a href="http://facebook.github.io/react/docs/animation.html">动画</a></p>
</body>
</html>