Webpack - 构建css未应用-Java 学习之路

我是ReactJS的新手 . 我正在尝试使用scss反应使用sass-loaders

我的webpack配置看起来像这样 -

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

var APP_DIR = path.resolve(__dirname + 'react-js/src/');
var BUILD_DIR = path.resolve(__dirname, 'react-js/dist/');

const ExtractTextPlugin = require("extract-text-webpack-plugin");

module.exports = {
    entry: './react-js/src/index.jsx',
    output: {
        path: BUILD_DIR,
        publicPath: '/dist',
        filename: 'bundle.js'
    },
    resolve: {
        extensions: ['.js', '.jsx']
    },
    module: {
        loaders: [
            { 
                test: /\.css$/,
                loader: ExtractTextPlugin.extract({
                    fallback: 'style-loader',
                    use: 'css-loader',
                    publicPath: '/dist'
                })
            },
            { 
                test: /\.scss$/,
                loader: ExtractTextPlugin.extract({
                    fallback: 'style-loader',
                    use: 'css-loader!sass-loader',
                    publicPath: '/dist'
                })
            },
            { 
                test: /\.(js|jsx)$/,
                loader: 'babel-loader',
                exclude: /node_modules/,
                query: {
                  presets: ['react', 'es2015']
                }
            }
        ]
    },
    plugins: [
        new ExtractTextPlugin('styles.css'),
    ]
}

所有这些配置都来自各自的文件 .

When I run webpack-dev-server it shows following output-

WDS starting

This is the screen when I save a scss file - Note - 我已从我的webpack配置文件中删除了ExtractTextPlugin .

WDS on scss file save

Directory structure -

enter image description here

我只是没有意识到它是如何导入到渲染的反应应用程序 . 我认为在index.jsx中导入scss文件如下所示将使css文件成为依赖项，但它不起作用 .

import React from 'react';
import ReactDOM from 'react-dom';

import App from './app';

import style from '../../scss/main.scss';

ReactDOM.render(
    <App />, 
    document.getElementById('root')
);

为什么？

Edited

的package.json

{
  "name": "skippo-vendor-admin-webui",
  "version": "1.0.0",
  "description": "",
  "main": "./react-js/src/index.jsx",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "dev": "./node_modules/.bin/webpack -d --progress --colors",
    "prod": "./node_modules/.bin/webpack -p --progress --colors",
    "watch": "./node_modules/.bin/webpack -d --progress --colors --watch",
    "start": "./node_modules/.bin/webpack-dev-server --progress --colors --hot --inline --contentBase './react-js/'"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-core": "^6.24.1",
    "babel-loader": "^7.0.0",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-react": "^6.24.1",
    "chai": "^3.5.0",
    "css-loader": "^0.28.1",
    "extract-text-webpack-plugin": "^2.1.0",
    "karma": "^1.6.0",
    "karma-chai": "^0.1.0",
    "karma-chrome-launcher": "^2.1.1",
    "karma-mocha": "^1.3.0",
    "karma-sinon": "^1.0.5",
    "karma-webpack": "^2.0.3",
    "mocha": "^3.3.0",
    "node-sass": "^4.5.2",
    "sass-loader": "^6.0.3",
    "sinon": "^2.2.0",
    "style-loader": "^0.17.0"
  },
  "dependencies": {
    "react": "^15.5.4",
    "react-dom": "^15.5.4",
    "react-redux": "^5.0.4",
    "react-router": "^4.1.1"
  }
}

2 回答

1
ExtractTextPlugin 应仅用于您的生产环境构建，因为它将创建一个单独的已编译的css文件，无需任何特殊处理即可提供 .

对于开发，您可以使用此规则：
```
{
  test: /\.s?css$/,
  use: ['style-loader', 'css-loader', 'sass-loader'],
}
```
如果您没有它们，请将3个加载器安装为dev依赖项 .

您也无需在导入scss文件时指定名称，只需导入它即可 .
```
import  '../../scss/main.scss';
```
回复于 2024-05-01T18:48:02+08:00

改变这一行

import style from '../../scss/main.scss';

同

import  '../../scss/main.scss';

回复于 2024-05-01T18:48:02+08:00

Webpack - 构建css未应用

2 回答

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