~~~ return <div> <p>{this.state.name}</p> <label htmlFor="inputName">姓名：</label> {/* 用 htmlFor 代替 for */} <input id="inputName" value={this.state.name} onChange={this.onInputChange}/> </div> ~~~ ~~~ onInputChange = (e) => { this.setState({ name: e.target.value }) } ~~~