- 介绍
- facebook推出的用于build user interfaces 的类库
- 使用
- o→ webpack
- webpack.config.js
-
var webpack = require('webpack')
module.exports = {
devtool: 'inline-source-map',
entry: ['webpack/hot/dev-server', __dirname + '/app/main.js'],
output: {
path: __dirname + '/build',
filename: 'bundle.js'
},
module: {
loaders: [
{
test: /\.(js|jsx)$/,
exclude: /node_modules/,
loader: 'babel-loader',
}
]
},
plugins: [
new webpack.HotModuleReplacementPlugin(),
new webpack.DefinePlugin({
'process.env': {
NODE_ENV: JSON.stringify('production')
}
})
],
devServer: {
contentBase: __dirname + '/build',
historyApiFallback: true,
inline: true,
port: 3031,
}
}
- index.html
-
<div id="content"></div>
<script src="bundle.js"></script>
- o→ browser
- index.html
-
<script src="build/react.js"></script>
<script src="build/react-dom.js"></script>
<script src="browser.min.js"></script>
<body>
<div id="example"></div>
<script type="text/babel">
ReactDOM.render(
<h1>Hello</h1>
document.getElementById('example')
)
</script>
</body>
- API
-
ReactDOM
render
render(
<h1>Hello</h1>
document.getElementById('example')
)
React
# createClass
createClass({
getInitialState () {return {liked: false}},
handleClick(event) {
this.setState({liked: !this.state.liked})
},
getDefaultProps () {
# 设定属性默认值
return {title: 'Hello'}
},
propTypes: {
# 限定属性的类型
title: React.PropTypes.string,isRequired
},
render () {return <h1></h1>}
})
# createElement
createElement('h1', {title: 'a'}, 'b')
# Component
class List extends React.Component{
constructor() {super()}
render() {return ()}
}
this
# 代表当前标签
props
# 属性
children
# 代表所有子节点的text
# 没有子节点, 是undefined, 有一个子节点, 是Object, 多个子节点是array
# React.Children来处理children
refs
# 获取dom
state
jsx
介绍
< 开头解析为html, { 开头解析为js
例子
# Profile.jsx
import React from 'react';
export default Class Profile extends React.Component {
constructor (props) {
super(props)
this.state = {
list: [1,2,3],
activeIndex: -1
}
},
activate (index) {
this.setState({activeIndex: index})
},
render () {
const {list, activeIndex} = this.state
const lis = list.map((item, index) => {
const cls = index === activeIndex ? 'active' : ''
return (
<li key={index} className={cls} onClick={() => this.activate(index)}></li>
)
})
return (<ul>{lis}</ul>)
}
}
o->
<div>
{/*注释*/}
{
names.map((name) => {return <div>{name}</div>})
}
</div>
o-> ref
<input ref="domNam">
o-> 事件
<p onClick={this.handleClick}>
o-> 属性
<Profile {...props} name='a'>
# 后面的覆盖前面的
- 插件
- 工具