React无法导入组件 - 找不到模块

Question

我刚开始使用React.js,我无法导入组件.

我有这个结构,如本教程(YouTube链接)所示:

-- src
----| index.html
----| app
------| index.js
------| components
--------| MyCompontent.js

这是我的index.js:

import React from 'react';
import { render } from 'react-dom';

import { MyCompontent } from "./components/MyCompontent";

class App extends React.Component {
    render() {
        return (
            <div>
              <h1>Foo</h1>
              <MyCompontent/>
            </div>
        );
    }
}

render(<App />, window.document.getElementById('app'));

这是MyComponent.js:

import React from "react";

export class MyCompontent extends React.Component {
  render(){
    return(
      <div>MyCompontent</div>
    );
  }
}

我正在使用这个webpack文件(GitHub链接).

但是,当我运行它时,我的模块无法加载.

我在浏览器控制台中收到此错误:

错误:找不到模块"./components/MyCompontent"

[WDS] Hot Module Replacement enabled.  bundle.js:631:11
[WDS] Errors while compiling.  bundle.js:631:11
./src/app/index.js
Module not found: Error: Cannot resolve 'file' or 'directory' ./components/MyCompontent in /home/kuno/code/react-hoteli/src/app
resolve file
  /home/kuno/code/react-hoteli/src/app/components/MyCompontent doesn't exist
  /home/kuno/code/react-hoteli/src/app/components/MyCompontent.webpack.js doesn't exist
  /home/kuno/code/react-hoteli/src/app/components/MyCompontent.web.js doesn't exist
  /home/kuno/code/react-hoteli/src/app/components/MyCompontent.js doesn't exist
  /home/kuno/code/react-hoteli/src/app/components/MyCompontent.json doesn't exist
resolve directory
  /home/kuno/code/react-hoteli/src/app/components/MyCompontent/package.json doesn't exist (directory description file)
  /home/kuno/code/react-hoteli/src/app/components/MyCompontent doesn't exist (directory default file)
[/home/kuno/code/react-hoteli/src/app/components/MyCompontent]
[/home/kuno/code/react-hoteli/src/app/components/MyCompontent.webpack.js]
[/home/kuno/code/react-hoteli/src/app/components/MyCompontent.web.js]
[/home/kuno/code/react-hoteli/src/app/components/MyCompontent.js]
[/home/kuno/code/react-hoteli/src/app/components/MyCompontent.json]
 @ ./src/app/index.js 11:20-56  bundle.js:669:5

无法弄清楚这里出了什么问题.

Answer 1

对于没有拼写错误并且正在使用Webpack的人来说,请务必检查这样的子句:

resolve: {
    extensions: [".jsx", ".js"]
},

在你的webpack.config.js中.

这告诉您的转换器解决如下语句:

import Setup from './components/Setup'

至

import Setup from './components/Setup.jsx'

这样您就不需要扩展名了.

Answer 2

您的导入中有拼写错误.你在请求MyCompontent.改成:

import MyComponent from "./components/MyComponent";

还有所有错别字.