react高阶组件

1 高阶组件就是一个函数，且该函数接受一个组件作为参数，并返回一个新的组件

import React, { Component } from 'react';
import simpleHoc from './simple-hoc';

class Usual extends Component {
  render() {
    console.log(this.props, 'props');
    return (
      <div>
        Usual
      </div>
    )
  }
}
export default simpleHoc(Usual);


import React, { Component } from 'react';

const simpleHoc = WrappedComponent => {
  console.log('simpleHoc');
  return class extends Component {
    render() {
      return <WrappedComponent {...this.props}/>
    }
  }
}
export default simpleHoc;