我是webpack的新手，但我开始在我的一个项目中使用它来了解它。
我想在引导程序中使用jQuery，但是，当我启动应用程序时，我收到以下错误：
bootstrap.min.js？5802：6未捕获错误：Bootstrap的JavaScript需要jQuery
在我的webpack配置中，我定义了两个入口点，一个用于项目库，一个用于外部源，称为供应商，如jQuery，Bootstrap等。
在供应商中，我已经在jQuery库之后定义了Bootstrap库，但我无法摆脱错误。我失踪的任何线索？
这是我的webapp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": ""
}
}
答案 0 :(得分：18)
我最终通过在ProvidePlugin中添加一个新条目来消除错误：
jQuery:"jquery"
所以最终插件看起来像这样：
new webpack.ProvidePlugin({
$: "jquery",
jquery: "jquery",
"window.jQuery": "jquery",
jQuery:"jquery"
})
我把它留在这里以防其他人面临同样的问题。
答案 1 :(得分：9)
使用Create React App可以像这样导入：
import 'jquery/src/jquery';
import '../node_modules/bootstrap-sass/assets/javascripts/bootstrap.min';
注意：这适用于jQuery 3。*
答案 2 :(得分：2)
您还可以添加Expose Loader包：
npm install expose-loader --save-dev
并在您的webpack入口点（即main.js）中使用，如下所示：
import 'expose?$!expose?jQuery!jquery'
// ...
答案 3 :(得分：0)
Bootstrap要求jquery在全局对象上可用。请尝试以下-
import 'bootstrap/dist/css/bootstrap.min.css';
const $ = require('jquery');
window.$ = $;
window.jQuery = $;
require('bootstrap/dist/js/bootstrap.min');
已针对bootstrap@3.3.7和jquery@2.2.4进行了验证。
Ref-issue