标签：oct width 页面 app one index val react viewport
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script src="../node_modules/react/umd/react.development.js"></script>
<script src="../node_modules/react-dom/umd/react-dom.development.js"></script>
<script src="../node_modules/babel-standalone/babel.js"></script>
</head>
<body>
<div id="app"></div>
<script src="./db.js"></script>
<script type="text/babel">
class Item extends React.Component{
constructor(props){
super(props);
};
render(){
let {myitem,arr} = this.props;
console.log( myitem,arr)
return(
<div>
{
arr.map((val,index)=>{ //遍历数组 拿到myitem的key值 然后将 myitem[val]这个数组进行遍历
return <div key={index}>
{myitem[val].map((v)=>{
return <div key={v.id}> //v是json数据 object.keys遍历拿到key值数组进行遍历 将里面的json解开 拿到子数组进行遍历和渲染
{Object.keys(v).map((it,ind)=>{
return <div key={ind}>
{it}:{v[it]}
</div>
})}
</div>
})}
</div>
})
}
</div>
)
}
}
class List extends React.Component{
constructor(props){
super(props);
};
render(){
let {item} = this.props;
return <div>
{ Object.keys(item)} //遍历json外层
<Item myitem={item} arr={Object.keys(item)}/> //传json和遍历的key的数组给子组件
</div>
}
}
class App extends React.Component{
constructor(props){
super(props);
this.state = {
data
}
};
render(){
return (
<div>
<List item={data}/> //传数据
</div>
)
}
}
ReactDOM.render(
<App/>,
document.getElementById(‘app‘)
)
</script>
</body>
</html>
标签：oct width 页面 app one index val react viewport
原文地址：https://www.cnblogs.com/l8l8/p/9457791.html
