这样引入css之后会报错

注释引入的css 就不报错了

目录结构如下

import './css/common.css';

import layer from './components/layer/layer.js';

const App = function  () {

console.log(layer)

}

new App();

npm run webpack

> webpack-test3@1.0.0 webpack /Users/liqian/Downloads/workerspace/webpack/webpack-test3

> webpack --config webpack.config.js --progress --dispaly-modules --colors --dispaly-reason

Hash: 7ce335b0518fe1163f9c                                                   

Version: webpack 4.27.0

Time: 639ms

Built at: 2018-12-07 14:03:07

            Asset       Size  Chunks             Chunk Names

       index.html  171 bytes          [emitted]  

js/main.bundle.js   4.86 KiB    main  [emitted]  main

Entrypoint main = js/main.bundle.js

[./src/app.js] 136 bytes {main} [built]

    + 1 hidden module

ERROR in ./src/app.js

Module not found: Error: Can't resolve '' in '/Users/liqian/Downloads/workerspace/webpack/webpack-test3'

 @ ./src/app.js 1:0-26

Child html-webpack-plugin for "index.html":

     1 asset

    Entrypoint undefined = index.html

    [./node_modules/html-webpack-plugin/lib/loader.js!./index.html] 366 bytes {0} [built]

    [./node_modules/webpack/buildin/global.js] (webpack)/buildin/global.js 472 bytes {0} [built]

    [./node_modules/webpack/buildin/module.js] (webpack)/buildin/module.js 519 bytes {0} [built]

        + 1 hidden module

npm ERR! code ELIFECYCLE

npm ERR! errno 2

npm ERR! webpack-test3@1.0.0 webpack: `webpack --config webpack.config.js --progress --dispaly-modules --colors --dispaly-reason`

npm ERR! Exit status 2

npm ERR! 

npm ERR! Failed at the webpack-test3@1.0.0 webpack script.

npm ERR! This is probably not a problem with npm. There is likely additional logging output above.