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20 lines
572 B
20 lines
572 B
/* react如何完成列表渲染
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技术方案：map 重复渲染的是哪个模板就 return 谁
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注意事项：遍历列表同时需要一个类型为 number/string 不可重复的 key， 提高 diff 性能
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key 仅仅在内部使用，不会出现在真实的 DOM 结构中
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*/
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const user = [
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{ id: 1, name: 'ken', age: 20},
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{ id: 2, name: 'Luckly', age: 30},
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{ id: 3, name: 'Max', age: 40},
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]
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function App() {
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return (
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<div className="App">
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{ user.map( user => <li key={user.id}>{ user.name }{user.age}</li>)}
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</div>
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);
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}
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export default App;
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