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用{}包裹变量后,除了可以填充内容以外,还可以填充标签属性的值

App.css

.p1 {
  color:#61dafb
}

App.js

import "./App.css";
const user = {
  name: "Jruing",
  age: 27,
  github: "https://github.com/Jruing",
};

const p_style = {
  name: "p1",
};

function App() {
  return (
    <>
      {/* 填充内容 */}
      <p>姓名:{user.name}</p>
      {/* 填充className的值 */} 
      <p className={p_style.name}>年龄:{user.age}</p>
      <a href={user.github}>github</a>
    </>
  );
}

export default App;