react 使用 ref 報錯 ，[eslint] Using string literals in ref attributes is deprecated. (react/no-string-refs)

react 項目中給指定元素加事件，使用到 react 的 ref 屬性，Eslink 報錯 [eslint] Using string literals in ref attributes is deprecated. (react/no-string-refs)

常用方法：（會報錯）

var Hello = createReactClass({ componentDidMount: function() { var component = this.refs.hello;  // ...do something with component }, render: function() {  return <div ref="hello">Hello, world.</div>; } });

正確方法：

var Hello = createReactClass({
  componentDidMount: function() {
    var component = this.hello;
    // ...do something with component
  },
  render() {
    return <div ref={(c) => { this.hello = c; }}>Hello, world.</div>;
  }
});