从外部设置为onChange内部的event.value按钮的值为空值

function handleChange(event) {
  event.target.value = "";
}

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      value: ""
    };
    this.handleChange = this.handleChange.bind(this);
  }
  
  handleChange(event) {
    this.setState({ value: "" });
  }
  
  render() {
    return (
      <input 
        type="text" 
        value={this.state.value}
        onChange={this.handleChange}
      />
    );
  }
}