错误：Uncaught (in promise) TypeError: Super expression must either be null or a function
一般是 React.Component 的引用和书写错误。
import React, { Component } from 'react';
export default class App extends Component {}
我是因为没引用React，加上就好了
错误：Uncaught (in promise) TypeError: Super expression must either be null or a function
一般是 React.Component 的引用和书写错误。
import React, { Component } from 'react';
export default class App extends Component {}
我是因为没引用React，加上就好了
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