带有 bootstrap.css 的 webpack 不起作用 [英] webpack with bootstrap.css not work

问题描述

这是我的 webpack.config.js 文件:

var ExtractTextPlugin = require('extract-text-webpack-plugin'),
    webpack = require('webpack');

module.exports = {
    entry: [
        './src/app.js',
    ],
    output: {
        path: __dirname + '/../web/js',
        filename: 'build.js',
    },
    module: {
        loaders: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                loader: 'babel-loader'
            },
            {
                test: /\.css$/,
                loader: ExtractTextPlugin.extract('style-loader', 'css-loader')
            },
            {
                test: /\.(png|woff|woff2|eot|ttf|svg)$/,
                loader: "url?limit=5000"
            }
        ]
    },
    plugins: [
        new webpack.ProvidePlugin({
            $: "jquery",
            jQuery: "jquery"
        }),
        new ExtractTextPlugin('build.css')
    ]
}

这是我的 package.json 文件:

"dependencies": {
    "angular": "^1.6.4",
    "babel-core": "^6.25.0",
    "babel-loader": "^7.1.1",
    "babel-polyfill": "^6.23.0",
    "babel-preset-es2015": "^6.24.1",
    "bootstrap": "^3.3.7",
    "css-loader": "^0.28.4",
    "extract-text-webpack-plugin": "^3.0.0",
    "file-loader": "^0.11.2",
    "jquery": "^3.2.1",
    "style-loader": "^0.18.2",
    "url-loader": "^0.5.9",
    "webpack": "^3.4.1"
}

这是我的 app.js 文件:

import 'babel-polyfill';
import $ from 'jquery';
import 'bootstrap/dist/js/bootstrap.js';
import 'bootstrap/dist/css/bootstrap.css';

尝试启动 webpack 后出现错误.

After trying to start the webpack I get an error.

ERROR in ./node_modules/bootstrap/dist/css/bootstrap.css Module parse failed:
/var/www/dcracks/app/webpack/node_modules/bootstrap/dist/css/bootstrap.css
Unexpected token (7:5) You may need an appropriate loader to handle this file type.
  |  */
  | /*! normalize.css v3.0.3
  | MIT License
  | github.com/necolas/normalize.css */
  | html {
  |   font-family: sans-serif;
  |   -webkit-text-size-adjust: 100%;
  @ ./node_modules/bootstrap/dist/css/bootstrap.css 4:14-42
  @ ./src/app.js  @ multi ./src/app.js

我已经重读了一堆材料，并在各种论坛上发布了一堆帖子.我做错了什么?

I reread already a bunch of material and shoveled a bunch of posts in various forums. What am I doing wrong?

推荐答案

ExtractTextPlugin.extract 的签名是:

ExtractTextPlugin.extract(options: loader | object)

由于没有第二个参数，您的 css-loader 没有被使用.最常见的配置是使用 css-loader 来处理 CSS 文件，使用 style-loader 作为回退，在不应该被提取时使用(配置的加载器仍然被应用，但不是被提取，而是使用了回退加载器).

As there is no second argument, your css-loader is not being used. The most common configuration is to use css-loader to process the CSS files and style-loader as a fallback, which is used when it shouldn't be extracted (the configured loaders are still applied, but instead of being extracted the fallback loader is used).

您可以使用 Readme - Usage 中显示的规则.

{
  test: /\.css$/,
  use: ExtractTextPlugin.extract({
    fallback: 'style-loader',
    use: 'css-loader'
  })
}

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