報錯如下：
Type '{ navList: any; }' is not assignable to type 'IntrinsicAttributes & IntrinsicClassAttributes<Nav> & Readonly<{}> & Readonly<{ children?: ReactNode; }>'. Property 'navList' does not exist on type 'IntrinsicAttributes & IntrinsicClassAttributes<Nav> & Readonly<{}> & Readonly<{ children?: ReactNode; }>'.

錯誤代碼：

import React from 'react';

class Nav extends React.PureComponent<{
  
},{
  
}> {
  constructor(props) {
    super(props);
    this.state = {
      
    };
  }

  render () {
    const navList = this.props && this.props.navList || {};
    return (
      <div>
       
      </div>
    )
  }
}

export default Nav;

問題是我們在這里把 props描述成了一個空對象。

改正之后：

import React from 'react';

class Nav extends React.PureComponent<{
  navList?: any
},{
  
}> {
  constructor(props) {
    super(props);
    this.state = {
      
    };
  }

  render () {
    const navList = this.props && this.props.navList || {};
    return (
      <div>
       
      </div>
    )
  }
}

export default Nav;

注：state 也同樣存在這個問題，詳見：http://www.itdecent.cn/p/a2f45dc7d45c