lovecoding
/
W250913


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./babel.min.js"></script>
    <script src="./react.development.js"></script>
    <script src="./react-dom.development.js"></script>
</head>

<body>
    <div id="root"></div>
    <!-- 
        React主要使用的是Js方法(map/forEach/for)
    -->
    <script type="text/babel">
        class App extends React.Component {
            constructor() {
                super();
                this.state = {
                    list: [
                        {
                            id:1,
                            name:'图图',
                            age:3
                        },
                        {
                            id:2,
                            name:'小美',
                            age:4
                        },
                        {
                            id:3,
                            name:'大壮',
                            age:5
                        }
                    ]
                }
                this.renderMain = this.renderMain.bind(this)
            }
            renderMain() {
                // console.log("走进来")
                // return  this.state.list.map((item) => {
                //     return <p>我叫{item.name}</p>
                // }) 
                let newList = [];
                // this.state.list.forEach((item) =>  {
                //     newList.push(<p>我叫{item.name}</p>)
                //     console.log(newList,'1')
                // })
                // console.log(newList)
                // return newList;
                for(let i=0;i<this.state.list.length;i++) {
                    newList.push(
                         <p>我叫{this.state.list[i].name}</p>
                    )
                    console.log(newList)
                }
                return newList;
            }
            render() {
                return (
                    <div>
                        <h1>列表渲染</h1>
                        <p>{this.renderMain()}</p>    
                    </div>
                )
            }
        }
        const element = <App/>
        const container = document.getElementById("root");
        const root = ReactDOM.createRoot(container)
        root.render(element);
    </script>
</body>

</html>