grazianodev grazianodev - 3 years ago 599
jQuery Question

jQuery is not defined (using Webpack)

I have three scripts:

<script type="text/javascript" src="main.min.js"></script>
<script type="text/javascript" src="script-A.js"></script>
<script type="text/javascript" src="script-B.js"></script>

is a file I create with Webpack. This file includes all the scripts I need for my project, including jQuery, which I have installed as a NPM package.

are scripts that unfortunately I can't include in my main Webpack file, so I need to load them separately. These scripts need jQuery as a dependency; but even though jQuery is included in
, I get a
jQuery is not defined
error when they are invoked.

By the way, in my Webpack file I already have these lines of code, which let me use jQuery in any script I handle through Webpack, but it doesn't seem to have any effect on the other scripts:

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

How can I fix the error? Ideally, I need a solution where I don't have to touch
since they belong to a plugin.


Uncaught ReferenceError: jQuery is not defined
at script-A.js?ver=2.9.6:1
Uncaught ReferenceError: jQuery is not defined
at script-B.js:617
at script-B.js:620


"name": "mysite",
"version": "1.0.0",
"description": "mysite",
"main": "webpack.config.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
"author": "",
"license": "ISC",
"dependencies": {
"jquery": "^3.2.1",
"jquery-lazy": "^1.7.5",
"salvattore": "^1.0.9",
"webpack": "^3.6.0"
"devDependencies": {
"babel-core": "^6.26.0",
"babel-loader": "^7.1.2",
"babel-preset-es2015": "^6.24.1",
"browser-sync": "^2.18.13",
"browser-sync-webpack-plugin": "^1.2.0",
"css-loader": "^0.28.7",
"extract-text-webpack-plugin": "^3.0.1",
"file-loader": "^1.1.5",
"node-sass": "^4.5.3",
"sass-loader": "^6.0.6",
"style-loader": "^0.19.0",
"url-loader": "^0.6.2",
"webpack-merge": "^4.1.0"

Answer Source

You need to make use of the expose-loader in order to make jQuery available to the other scripts on the global scope.

module: {
  rules: [{
    test: require.resolve('jquery'),
    use: [{
        loader: 'expose-loader',
        options: 'jQuery'
        loader: 'expose-loader',
        options: '$'
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