javascript - 从子组件 React 传递参数

Question

我尝试将参数从子组件传递给父组件。附言如果有人修复此问题，下面的代码片段将不起作用，那将非常棒。

class Parent extends React.Component {

  suggestionClick(id) {
    console.log(this.props, id); // {props Object} , undefined
  }

  render(){
    return (
      <ChildComponent click={this.suggestionClick.bind(this)} />
    );
  }
}


const ChildComponent = ({ click }) => (
  <SubChildComponent id="1" click={() => click()} />
);

const SubChildComponent = ({ click, id }) => (
  <div className="subsubcomponent" click={() => click(id)} />
);



ReactDOM.render(
  <Parent />,
  document.getElementById('app')
);

<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="app"></div>

Answer 1

1. 不要使用 div 来触发点击。例如，正确的方法是使用按钮
2. 正确的函数处理程序是 onClick 而不仅仅是点击

class Parent extends React.Component {

  suggestionClick(id) {
    alert(id);
    console.log(this.props, id); // {props Object} , undefined
  }

  render(){
    return (
      <ChildComponent click={this.suggestionClick.bind(this)} />
    );
  }
}


const ChildComponent = ({ click }) => (
  <SubChildComponent id="1" click={click} />
);

const SubChildComponent = ({ click, id }) => (
  <button className="subsubcomponent" onClick={() => click(id)}>click me</button>
);



ReactDOM.render(
  <Parent />,
  document.getElementById('app')
);

<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="app"></div>