如何配置webpack以运行bootstrap和sass？

Question

我对webpack不太满意.我没有真正"学习它",我有一个模板/样板我从我制作的回购中提取,这给了我一个在React中构建的环境.我正在努力为我的项目添加引导功能,因为我对webpack并不了解并且了解加载器等的工作方式.有人可以帮我一把吗？也许是关于webpack加载器的简单解释？(在我的名单上学习它,但不是优先考虑的事项).

我得到奇怪的错误,如:

错误在./~/bootstrap-sass/assets/fonts/bootstrap/glyphicons-halflings-regular.woff2

这是我的webpack.config.js

var webpack = require('webpack');
var path = require('path');


var BUILD_DIR = path.resolve(__dirname, 'src/client/public');
var APP_DIR = path.resolve(__dirname, 'src/client/app');

var config = {
  entry: APP_DIR + '/index.jsx',
  output: {
    path: BUILD_DIR,
    filename: 'bundle.js'
  },
  module : {
    loaders : [
      {
        test : /\.jsx?/,
        include : APP_DIR,
        loader : 'babel'
      },
      {
        test: /\.scss$/,
        loaders: ["style", "css", "sass"]
      }
    ]
  }
};

module.exports = config;

这是我的package.json

{
  "name": "react-camper-leaderboard",
  "version": "1.0.0",
  "description": "freecodecamp leaderboard sorter",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "dev": "webpack -d --watch",
    "build": "webpack -p"
  },
  "author": "Tim Bell",
  "license": "ISC",
  "dependencies": {
    "babel-loader": "^6.2.2",
    "babel-preset-es2015": "^6.5.0",
    "babel-preset-react": "^6.5.0",
    "bootstrap": "^4.0.0-alpha.2",
    "bootstrap-loader": "^1.0.8",
    "bootstrap-sass": "^3.3.6",
    "css-loader": "^0.23.1",
    "file-loader": "^0.8.5",
    "node-sass": "^3.4.2",
    "react": "^0.14.7",
    "react-dom": "^0.14.7",
    "resolve-url-loader": "^1.4.3",
    "sass-loader": "^3.1.2",
    "style-loader": "^0.13.0",
    "url-loader": "^0.5.7"
  },
  "devDependencies": {
    "css-loader": "^0.23.1",
    "node-sass": "^3.4.2",
    "sass-loader": "^3.1.2",
    "webpack": "^1.12.13"
  },
  "babel": {
    "presets": [
      "es2015",
      "react"
    ]
  }
}

Answer 1

从sass-loader中查看示例.你webpack.config.js应该看起来像这样:

module.exports = {
    ...
    module: {
        loaders: [
            {
                test: /\.woff2?$|\.ttf$|\.eot$|\.svg$/,
                loader: "file"
            },
            {
                test: /\.scss$/,
                loaders: ["style", "css", "sass"]
            }
        ]
    }
};

既然你已经添加了一堆加载器,你应该确保安装了所有这些加载器:

npm i file-loader style-loader css-loader sass-loader --save-dev

然后你应该添加你的main.scsswebpack条目到webpack.config.js...

module.exports = {
   ...
    entry: [
        path.resolve(__dirname, '..', 'path', 'to',  'main.scss'),
        // add other entries
    ],
    ...

...或者只需要/导入它main.js:

require("./path/to/main.scss");

由于bootstrap需要url()配置其路径,因此您需要$icon-font-path 在导入引导之前进行设置.你main.scss应该看起来像这样:

$icon-font-path: "~bootstrap-sass/assets/fonts/bootstrap/";
@import "~bootstrap-sass/assets/stylesheets/bootstrap";

如果你认为@import "~bootstrap-sass/assets/stylesheets/bootstrap";看起来很难看,你也可以为你的别名添加一个别名webpack.config.js:

module.exports = {
   ...
    resolve: {
        alias: {
            "bootstrap-sass$": "bootstrap-sass/assets/stylesheets/bootstrap"
        }
    },

那你只需要写:

@import "~bootstrap-sass";

Answer 2

import您或以任何其他方式加载的每个扩展都require必须有自己的加载程序。

截至woff2您可能已经添加了类似的内容：

{
    test: /\.woff2$/,
    loader: 'url',
    query: {
        limit: 10240,
        name: 'static/[hash].[ext]'
    }
}

您可能需要检查有关它接受的所有参数的url-loader文档。

您还可以匹配多个不同的文件名模式以与同一加载器一起使用，例如：

{
    test: /\.(eot|ttf|svg|png|gif|woff2?$/,
    loader: 'url',
    query: {
        limit: 10240,
        name: 'static/[hash].[ext]'
    }
}

这将加载所有这些扩展。