Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jade, coffee, css, less, ... and your custom stuff.
Check out webpack's documentation for quick Getting Started guide, in-depth usage, tutorials and resources.
npm install webpack --save-dev
npm install webpack -g
Take a look at the
webpack has a rich plugin interface. Most of the features within webpack itself use this plugin interface. This makes webpack very flexible.
webpack uses async I/O and has multiple caching levels. This makes webpack fast and incredibly fast on incremental compilations.
Loaders are activated by using
loadername! prefixes in
or are automatically applied via regex from your webpack configuration.
Please see Using Loaders for more information.
json: Loads file as JSON
raw: Loads raw content of a file (as utf-8)
file: Emits the file into the output folder and returns the (relative) url.
url: The url loader works like the file loader, but can return a Data Url if the file is smaller than a limit.
image: Compresses your images. Ideal to use together with
svgo-loader: Compresses SVG images using svgo library
baggage: Automatically require any resources related to the required one
polymer-loader: Process HTML & CSS with preprocessor of choice and
require()Web Components like first-class modules.
babel: Turn ES6 code into vanilla ES5 using Babel.
sweetjs: Use sweetjs macros.
html: Exports HTML as string, require references to static resources.
jade: Loads jade template and returns a function
handlebars: Loads handlebars template and returns a function
ractive: Pre-compiles Ractive templates for interactive DOM manipulation
markdown: Compiles Markdown to HTML
ng-cache: Puts HTML partials in the Angular's $templateCache
style: Add exports of a module as style to DOM
css: Loads css file with resolved imports and returns css code
less: Loads and compiles a less file
sass: Loads and compiles a scss file
stylus: Loads and compiles a stylus file
po: Loads a PO gettext file and returns JSON
mocha: Do tests with mocha in browser or node.js
eslint: PreLoader for linting code using ESLint.
jshint: PreLoader for linting code.
jscs: PreLoader for style checking.
injectable: Allow to inject dependencies into modules
transform: Use browserify transforms as loader.
For the full list of loaders, see list of loaders.
webpack supports both AMD and CommonJS module styles. It performs clever static analysis on the AST of your code. It even has an evaluation engine to evaluate simple expressions. This allows you to support most existing libraries out of the box.
webpack allows you to split your codebase into multiple chunks. Chunks are loaded asynchronously at runtime. This reduces the initial loading time.
webpack optimizes in several ways. It also makes your chunks cache-friendly by using hashes.
// webpack is a module bundler.// This means webpack takes modules with dependencies// and emits static assets representing those modules.// Dependencies can be written in CommonJsvar commonjs = require"./commonjs";// or in AMDdefine"amd-module" "../file"// while previous constructs are sync,// this is asyncrequire"big-module/big/file"// For async dependencies, webpack splits// your application into multiple "chunks".// This part of your application is// loaded on demand (code-splitting).var stuff = require"../my/stuff";// "../my/stuff" is also loaded on-demand// because it's in the callback function// of the AMD require.;;require"coffee!./cup.coffee";// "Loaders" are used to preprocess files.// They can be prefixed in the require call// or configured in the configuration.require"./cup";// This does the same when you add ".coffee" to the extensions// and configure the "coffee" loader for /\.coffee$/return require"./templates/" + name + ".jade";// Many expressions are supported in require calls.// A clever parser extracts information and concludes// that everything in "./templates" that matches// /\.jade$/ should be included in the bundle, as it// can be required.// ...and you can combine everything.require"bundle?lazy!./templates/" + name + ".jade"templateBundlecallback;;
You can run the browser tests:
cd test/browsertestsnode build
tests.html in the browser.
Most of the time, if webpack is not working correctly for you it is a simple configuration issue.
If you are still having difficulty after looking over your configuration carefully, please post a question to StackOverflow with the webpack tag. Questions that include your webpack.config.js and relevant files are more likely to receive responses.
If you have discovered a bug or have a feature suggestion, feel free to create an issue on Github.
If you create a loader or plugin, please consider open sourcing it, putting it
on NPM and following the
You are also welcome to correct any spelling mistakes or any language issues.
If you want to discuss something or just need help, here is our gitter.im room.
Copyright (c) 2012-2015 Tobias Koppers
(In chronological order)
This is a free-time project. The time I invest in it fluctuates. If you use webpack for a serious task, and you'd like me to invest more time on it, please donate. This project increases your income/productivity too. It makes development and applications faster and it reduces the required bandwidth.
I'm very thankful for every dollar. If you leave your username or email, I may show my thanks by giving you extra support.