错误：Bootstrap的JavaScript需要jQuery，使用Webpack

Question

我是webpack的新手，但是我开始在我的一个项目中使用它来了解它。 我想使用jQuery自举，但是当我启动我得到下面的错误应用：

bootstrap.min.js?5802:6Uncaught Error: Bootstrap's JavaScript requires jQuery 

在我的WebPack配置，我定义了两个入口点，一个用于项目库和一个用于外部的，称为供应商，如jquery，bootstrap等。在供应商中，我定义了jQuery库之后的引导库，但是我无法摆脱错误，我失踪的任何线索？

这是我的web应用程序的配置，

import webpack from 'webpack'; 
import HtmlWebpackPlugin from 'html-webpack-plugin'; 
import autoprefixer from 'autoprefixer'; 
let node_dir = __dirname + '/node_modules'; 

export default { 
    resolve: { 
    extensions: ['', '.js', '.jsx'], 
    alias: { 
     'jquery': node_dir + '/jquery/dist/jquery.js', 
     'jquery-validation': node_dir + '/jquery-validation/dist/jquery.validate.js', 
     'bootstrap': node_dir + '/bootstrap/dist/js/bootstrap.min.js' 
    } 
    }, 
    debug: true, 
    devtool: 'cheap-module-eval-source-map', // more info:https://webpack.github.io/docs/build-performance.html#sourcemaps and https://webpack.github.io/docs/configuration.html#devtool 
    noInfo: true, // set to false to see a list of every file being bundled. 

    entry: { 
    // must be first entry to properly set public path 
    app: ['./src/webpack-public-path', 
     'webpack-hot-middleware/client?reload=true', 
     './src/index'], 
    vendors: ['jquery','jquery-validation','bootstrap'] 
    }, 
    target: 'web', // necessary per https://webpack.github.io/docs/testing.html#compile-and-test 
    output: { 
    path: `${__dirname}/src`, // Note: Physical files are only output by the production build task `npm run build`. 
    publicPath: '/', 
    filename: 'bundle.js' 
    }, 
    plugins: [ 
    new webpack.DefinePlugin({ 
     'process.env.NODE_ENV': JSON.stringify('development'), // Tells React to build in either dev or prod modes. https://facebook.github.io/react/downloads.html (See bottom) 
     __DEV__: true 
    }), 
    new webpack.HotModuleReplacementPlugin(), 
    new webpack.NoErrorsPlugin(), 
    new HtmlWebpackPlugin({  // Create HTML file that includes references to bundled CSS and JS. 
           //template: 'src/index.ejs', 
     template: 'src/index.html', 
     minify: { 
     removeComments: true, 
     collapseWhitespace: true 
     }, 
     inject: true 
    }), 
    new webpack.ProvidePlugin({ 
     $: "jquery", 
     jquery: "jquery", 
     "windows.jQuery": "jquery" 
    }), 
    new webpack.optimize.CommonsChunkPlugin('vendors', 'vendors.js', Infinity) 
    ], 
    module: { 
    loaders: [ 
     {test: /\.jsx?$/, exclude: /node_modules/, loaders: ['babel']}, 
     {test: /\.eot(\?v=\d+.\d+.\d+)?$/, loader: 'file'}, 
     {test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/, loader: "url?limit=10000&mimetype=application/font-woff"}, 
     {test: /\.ttf(\?v=\d+\.\d+\.\d+)?$/, loader: 'url?limit=10000&mimetype=application/octet-stream'}, 
     {test: /\.svg(\?v=\d+\.\d+\.\d+)?$/, loader: 'url?limit=10000&mimetype=image/svg+xml'}, 
     {test: /\.(jpe?g|png|gif)$/i, loader: 'file?name=[name].[ext]'}, 
     {test: /\.ico$/, loader: 'file?name=[name].[ext]'}, 
     {test: /(\.css|\.scss)$/, loaders: ['style', 'css?sourceMap', 'postcss', 'sass?sourceMap']} 
    ] 
    }, 
    postcss:()=> [autoprefixer] 
}; 

，这是我的package.json文件：

{ 
    "name": "dario-webapplication", 
    "version": "1.0.0", 
    "description": "Webapplication for Dario project", 
    "engines": { 
    "npm": ">=3" 
    }, 
    "scripts": { 
    "preinstall": "node tools/nodeVersionCheck.js", 
    "setup": "node tools/setup/setupMessage.js && npm install && node tools/setup/setup.js", 
    "remove-demo": "babel-node tools/removeDemo.js", 
    "start-message": "babel-node tools/startMessage.js", 
    "prestart": "npm-run-all --parallel start-message remove-dist", 
    "start": "npm-run-all --parallel open:src lint:watch", 
    "open:src": "babel-node tools/srcServer.js", 
    "open:dist": "babel-node tools/distServer.js", 
    "lint": "esw webpack.config.* src tools --color", 
    "lint:watch": "npm run lint -- --watch", 
    "clean-dist": "npm run remove-dist && mkdir dist", 
    "remove-dist": "rimraf ./dist", 
    "prebuild": "npm run clean-dist && npm run lint && npm run test", 
    "build": "babel-node tools/build.js && npm run open:dist", 
    "test": "mocha tools/testSetup.js \"src/**/*.spec.js\" --reporter progress", 
    "test:cover": "babel-node node_modules/isparta/bin/isparta cover --root src --report html node_modules/mocha/bin/_mocha -- --require ./tools/testSetup.js \"src/**/*.spec.js\" --reporter progress", 
    "test:cover:travis": "babel-node node_modules/isparta/bin/isparta cover --root src --report lcovonly _mocha -- --require ./tools/testSetup.js \"src/**/*.spec.js\" && cat ./coverage/lcov.info | node_modules/coveralls/bin/coveralls.js", 
    "test:watch": "npm run test -- --watch", 
    "open:cover": "npm run test:cover && open coverage/index.html" 
    }, 
    "author": "Francisco Jose Parra Gonzalez", 
    "license": "MIT", 
    "dependencies": { 
    "bootstrap": "3.3.7", 
    "jquery": "2.1.4", 
    "jquery-validation": "1.15.1", 
    "object-assign": "4.1.0", 
    "react": "15.3.0", 
    "react-bootstrap": "0.30.3", 
    "react-dom": "15.3.0", 
    "react-redux": "4.4.5", 
    "react-router": "2.6.1", 
    "react-router-redux": "4.0.5", 
    "redux": "3.5.2", 
    "redux-thunk": "2.1.0" 
    }, 
    "devDependencies": { 
    "autoprefixer": "6.4.0", 
    "babel-cli": "6.11.4", 
    "babel-core": "6.11.4", 
    "babel-loader": "6.2.4", 
    "babel-plugin-react-display-name": "2.0.0", 
    "babel-plugin-transform-react-remove-prop-types": "0.2.9", 
    "babel-preset-es2015": "6.9.0", 
    "babel-preset-react": "6.11.1", 
    "babel-preset-react-hmre": "1.1.1", 
    "babel-preset-stage-1": "6.5.0", 
    "babel-register": "6.11.6", 
    "browser-sync": "2.14.0", 
    "chai": "3.5.0", 
    "chalk": "1.1.3", 
    "connect-history-api-fallback": "1.2.0", 
    "coveralls": "2.11.12", 
    "cross-env": "2.0.0", 
    "css-loader": "0.23.1", 
    "enzyme": "2.4.1", 
    "eslint": "3.2.2", 
    "eslint-plugin-import": "1.12.0", 
    "eslint-plugin-jsx-a11y": "2.0.1", 
    "eslint-plugin-react": "6.0.0", 
    "eslint-watch": "2.1.14", 
    "extract-text-webpack-plugin": "1.0.1", 
    "file-loader": "0.9.0", 
    "html-webpack-plugin": "2.22.0", 
    "isparta": "4.0.0", 
    "mocha": "3.0.1", 
    "mockdate": "1.0.4", 
    "node-sass": "3.8.0", 
    "npm-run-all": "2.3.0", 
    "open": "0.0.5", 
    "postcss-loader": "0.9.1", 
    "prompt": "1.0.0", 
    "react-addons-test-utils": "15.3.0", 
    "redux-immutable-state-invariant": "1.2.3", 
    "replace": "0.3.0", 
    "rimraf": "2.5.4", 
    "sass-loader": "4.0.0", 
    "sinon": "1.17.5", 
    "sinon-chai": "2.8.0", 
    "style-loader": "0.13.1", 
    "url-loader": "0.5.7", 
    "webpack": "1.13.1", 
    "webpack-dev-middleware": "1.6.1", 
    "webpack-hot-middleware": "2.12.2", 
    "webpack-md5-hash": "0.0.5" 
    }, 
    "keywords": [], 
    "repository": { 
    "type": "git", 
    "url": "" 
    } 
} 

Answer 1

我终于摆脱了错误的只是通过增加在ProvidePlugin一个新条目：

jQuery:"jquery" 

所以最后这个插件看起来是这样的：

new webpack.ProvidePlugin({ 
    $: "jquery", 
    jquery: "jquery", 
    "window.jQuery": "jquery", 
    jQuery:"jquery" 
}) 

我离开这里，以防别人面临着同样的问题。

Answer 2

您还可以添加Expose Loader包：

npm install expose-loader --save-dev 

而在你的WebPack入口点使用（即main.js）是这样的：

import 'expose?$!expose?jQuery!jquery' 

// ... 

Answer 3

使用Create React App你可以导入这样的：

import 'jquery/src/jquery'; 
import '../node_modules/bootstrap-sass/assets/javascripts/bootstrap.min'; 

注意：这是针对jQuery 3. *