javascript - 将 react 文本字段输入值作为参数传递给方法

Question

我有以下输入字段，我需要获取输入的内容并将其传递给如下所示按钮的 onClick 事件。

<input type="text" style={textFieldStyle} name="topicBox" placeholder="Enter topic here..."/>
<input type="text" style = {textFieldStyle} name="payloadBox" placeholder="Enter payload here..."/>
<button value="Send" style={ buttonStyle } onClick={this.publish.bind(this,<value of input field 1>,<value of input field2>)}>Publish</button><span/>

我有一个名为 publish 的方法，它接受两个字符串参数。代替那些字符串，我需要传递在输入字段中输入的值。如果不将值存储在状态中，我如何才能实现这一目标？我不想将输入字段值存储在状态变量中。任何帮助将不胜感激。

Answer 1

How can I achieve this without storing the values in states?

我认为在这种情况下更好地使用状态

class App extends React.Component {
  constructor() {
    super();
    this.state = {
      topicBox: null,
      payloadBox: null
    };
    
    this.publish = this.publish.bind(this);
    this.handleChange = this.handleChange.bind(this);
  }
  
  handleChange({ target }) {
    this.setState({
      [target.name]: target.value
    });
  }

  publish() {
    console.log( this.state.topicBox, this.state.payloadBox );
  }
  
  render() {
    return <div>
      <input 
        type="text" 
        name="topicBox" 
        placeholder="Enter topic here..." 
        value={ this.state.topicBox }
        onChange={ this.handleChange } 
      />
      
      <input 
        type="text" 
        name="payloadBox" 
        placeholder="Enter payload here..."
        value={ this.state.payloadBox } 
        onChange={ this.handleChange } 
      />
      
      <button value="Send" onClick={ this.publish }>Publish</button>
    </div>
  }
}

ReactDOM.render(<App />, document.getElementById('container'));

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<div id="container"></div>