class Mybtn extends Component { render() { return ( <button>{this.props.title}</button> ); } } class App extends Component { constructor(props) { super(props); } render() { return ( <div> <h2>hello,{this.props.name}</h2> <Mybtn title='提交'></Mybtn> <Mybtn title='刪除'></Mybtn> <Mybtn title='修改'></Mybtn> <Mybtn title='添加'></Mybtn> </div> ) } } export default App;