javascript - Flow、ReactJS 和 ES6 类的错误

Question

为什么这些错误显示在 flow 中。我正在使用带有 ES6 类的 React。代码示例如下:

更新

基于这个示例，我几乎可以正常工作: https://flowtype.org/docs/react.html#defining-components-as-react-component-subclasses

我摆脱了大部分 Flow 错误，但现在应用程序在运行时失败了。我认为这是 ReactJS 没有剥离 Flow 或 Babel 类的东西。如果我在下面的代码中注释掉 Flow 类型定义，我就不会收到此错误。

我正在使用 watchify -t [ babelify ] app.js -o ./build/app.js 运行我的应用程序

SyntaxError: /Users/carlf/Documents/dev/reactjs/FlyTweet/app/views/posts/MyNewPostForm.js: Missing class properties transform. while parsing file: /Users/carlf/Documents/dev/reactjs/FlyTweet/app/views/posts/MyNewPostForm.js

流程错误:

app/views/posts/MyNewPostForm.js:51 51: var myPostTxt = ReactDOM.findDOMNode(this.Refs.content).value; ^^^^ property Refs. Property not found in 15: export default class MyNewPostForm extends React.Component { ^^^^^^^^^^^^^ MyNewPostForm

来自package.json

  "dependencies": {
    "babel-preset-react": "6.5.0",
    "babelify": "7.3.0",
    "react": "15.1.0",
    "react-dom": "15.1.0",
    "react-router": "2.4.1"
  }

React 组件

export default class MyNewPostForm extends React.Component {

  // START Flow type definitions.
  MAX_POST_CHARS: number; 

  state: {
      charsRemaining: number,
      SendButtonDisabled: boolean
  };

  handleChange: () => void;
  onSubmit: () => void;
  // END Flow type definitions.

  constructor() {
    super();

    this.MAX_POST_CHARS = 139;

    this.state = {
        charsRemaining: this.MAX_POST_CHARS,
        SendButtonDisabled: true
    };

   this.handleChange = this.handleChange.bind(this);    
   this.onSubmit = this.onSubmit.bind(this);    

  }

  handleChange() {
     var myPostTxt = ReactDOM.findDOMNode(this.refs.content).value;

     // Do something here.
  }

Answer 1

可能唯一的流程错误是 Refs 中的大写 R？它在您提供的代码中为小写，但在错误消息中为大写。