javascript - “React” 未定义 React Router with Typescript

Question

这是我想通过 Typescript 运行的 React Router 设置。它可以在没有 Typescript 的情况下工作，但不能与 Typescript 一起工作。我在浏览器控制台中收到运行时错误。不过，转译效果很好。如果我单独包含“react.js”和“react-dom.js”，或者包含所有内容的巨大“bundle.js”，都没有什么区别。我做错了什么？

错误:

Router.js:91 Uncaught TypeError: Cannot read property 'Component' of undefined
// For context, the line says: React.Component
at Object../node_modules/react-router/es/Router.js (Router.js:91)
at __webpack_require__ (bootstrap:19)
at Object../node_modules/react-router-dom/es/Router.js (Router.js:2)
at __webpack_require__ (bootstrap:19)
at Object../node_modules/react-router-dom/es/BrowserRouter.js (BrowserRouter.js:11)
at __webpack_require__ (bootstrap:19)
at Object../node_modules/react-router-dom/es/index.js (index.js:1)
at __webpack_require__ (bootstrap:19)
at Object../src/index.tsx (index.tsx:3)
at __webpack_require__ (bootstrap:19)

代码:

import * as React from "react";
import * as ReactDOM from "react-dom";
import { BrowserRouter as Router, Route, Switch }  from "react-router-dom";

class App extends React.Component {
  render() {
    return (
        <Router>
        <Switch>
        <Route path="/test/" render={() => (
            <div>
                Test.
            </div>
        )} />
        <Route exact={true} path="/" render={() => (
            <div>
                Root page.
            </div>
        )} />
        </Switch>
        </Router>
    );
  }
}

ReactDOM.render(
    <App />,
    document.getElementById("root") as HTMLElement
);

Answer 1

好的。

解决方案是将 "esModuleInterop": true 添加到我的 tsconfig.json 中。

此外，"allowSyntheticDefaultImports": true 允许我编写 import React from "react"; 而不是 import * as React from "react";.

谢谢大家。