使用Webpack4加载JQuery

Question

我在尝试用Webpack 4加载JQuery时遇到了很多问题。当我检查控制台查看JQuery是否正常工作时，我总是收到"jQuery未定义“的错误信息。

这是我的webbpack.config.js：

const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const WebpackMd5Hash = require('webpack-md5-hash');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
module.exports = {
    entry: path.resolve(__dirname, 'src/js/scripts.js'),
    output: {
        path: path.resolve(__dirname,'dist'),
        filename: '[name].[chunkhash].js'
    },
    module: {
        rules: [
            //JQUERY
            {
                test: require.resolve('jquery'),
                use: [{
                  loader: 'expose-loader',
                  options: 'jQuery'
                },{
                  loader: 'expose-loader',
                  options: '$'
                }]
            },                
            //FONTS
            {
                test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
                use: [
                    {
                        loader: 'url-loader?limit=50000&name=fonts/[name].[ext]',
                    }
                ]
            },        
            {
                test: /\.(ttf|eot|svg)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
                use: [
                    { loader: 'file-loader?limit=50000&name=fonts/[name].[ext]'}
                ]
            },            
            //JS
            {
                //Tipo de Archivo quiero reconocer
                test: /\.js$/,
                exclude: /node_modules/,
                //Que Loader se encarga del tipo de extension de archivo
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets:['babel-preset-env']
                    }
                },
            },                                               
            //IMAGES
            {
                test: /\.(jpg|png|gif)$/,
                use: {
                    loader: 'file-loader',
                    options: {
                        outputPath: 'img/',
                        name:'[name].[ext]', 
                    }
                }
            },                       
            //SASS
            {
                test: /\.scss$/,
                use: ['style-loader', MiniCssExtractPlugin.loader, 'css-loader', 'postcss-loader', 'sass-loader']
            }           
        ]
    },
    plugins: [
        new MiniCssExtractPlugin({
            filename:'css/style.min.[contenthash].css',
        }),
        new HtmlWebpackPlugin ({
            inject: false,
            hash: true,
            template: './src/index.html',
            filename: 'index.html'        
        }),
        new webpack.ProvidePlugin({
            $: 'jquery',
            jQuery: 'jquery',
            'windows.jQuery': 'jquery',
        }),        
        new WebpackMd5Hash()   
    ]
}

正如您所看到的，我正在使用expose loader和ProvidePlugin来尝试实现这一点。这就是我尝试在index.js中导入JQuery的方法：

import '../styles/style.scss';
import 'bootstrap';
import $ from 'jquery';
window.jQuery = $;
window.$ = $;
require.context("../img/", true, /\.(png|svg|jpg|gif)$/);
require("expose-loader?$!jquery");
require("style-loader!css-loader!sass-loader!./font-awesome-sass-styles.loader!./font-awesome-sass.config.js");
$( document ).ready(function() {
    console.log('Hello World from JQuery');
});