键入..时，React.js onChange处理程序会更改所有输入字段。当它是事件目标时，我如何让每一个都键入？

import React, { Component } from 'react';

class MyForm extends Component {
  constructor(props) {
    super(props);
    this.state = {
      input1: '',
      input2: '',
      input3: ''
    };
  }

  handleChange = (event) => {
    this.setState({ [event.target.name]: event.target.value });
  }

  render() {
    return (
      <div>
        <input
          type="text"
          name="input1"
          value={this.state.input1}
          onChange={this.handleChange}
        />
        <input
          type="text"
          name="input2"
          value={this.state.input2}
          onChange={this.handleChange}
        />
        <input
          type="text"
          name="input3"
          value={this.state.input3}
          onChange={this.handleChange}
        />
      </div>
    );
  }
}