Big update!Introducing GitHub Bot Commands. Learn more
Log inDemoInstall


Package Overview
File Explorer

Advanced tools


Webpack Virtual Modules


Version published
Weekly downloads
increased by8.26%

Weekly downloads



Webpack Virtual Modules

Build Status Twitter Follow

Webpack Virtual Modules is a plugin that allows for dynamical generation of in-memory virtual modules for JavaScript builds created with webpack. When virtual module is created all the parent virtual dirs that lead to the module filename are created too. This plugin supports watch mode meaning any write to a virtual module is seen by webpack as if a real file stored on disk has changed.


Use NPM or Yarn to install Webpack Virtual Modules as a development dependency:

# with NPM npm install webpack-virtual-modules --save-dev # with Yarn yarn add webpack-virtual-modules --dev


You can use Webpack Virtual Modules with webpack 5, 4 and 3. The examples below show the usage with webpack 5 or 4. If you want to use our plugin with webpack 3, check out a dedicated doc:

Generating static virtual modules

Require the plugin in the webpack configuration file, then create and add virtual modules in the plugins array in the webpack configuration object:

var VirtualModulesPlugin = require('webpack-virtual-modules'); var virtualModules = new VirtualModulesPlugin({ 'node_modules/module-foo.js': 'module.exports = { foo: "foo" };', 'node_modules/module-bar.js': 'module.exports = { bar: "bar" };' }); module.exports = { // ... plugins: [ virtualModules ] };

You can now import your virtual modules anywhere in the application and use them:

var moduleFoo = require('module-foo'); // You can now use moduleFoo console.log(;

Generating dynamic virtual modules

You can generate virtual modules dynamically with Webpack Virtual Modules.

Here's an example of dynamic generation of a module. All you need to do is create new virtual modules using the plugin and add them to the plugins array. After that, you need to add a webpack hook. For using hooks, consult webpack compiler hook documentation.

var webpack = require('webpack'); var VirtualModulesPlugin = require('webpack-virtual-modules'); // Create an empty set of virtual modules const virtualModules = new VirtualModulesPlugin(); var compiler = webpack({ // ... plugins: [ virtualModules ] }); compiler.hooks.compilation.tap('MyPlugin', function(compilation) { virtualModules.writeModule('node_modules/module-foo.js', ''); });;

In other module or a Webpack plugin, you can write to the module module-foo whatever you need. After this write, webpack will "see" that module-foo.js has changed and will restart compilation.

virtualModules.writeModule( 'node_modules/module-foo.js', 'module.exports = { foo: "foo" };' );

More Examples

API Reference


This project is inspired by virtual-module-webpack-plugin.


Copyright © 2017 SysGears INC. This source code is licensed under the MIT license.



What is webpack-virtual-modules?

Webpack Virtual Modules

Is webpack-virtual-modules popular?

The npm package webpack-virtual-modules receives a total of 8,387,642 weekly downloads. As such, webpack-virtual-modules popularity was classified as popular.

Is webpack-virtual-modules well maintained?

We found that webpack-virtual-modules demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago.It has 1 open source maintainer collaborating on the project.

Last updated on 11 Dec 2022

Did you know?

Socket installs a Github app to automatically flag issues on every pull request and report the health of your dependencies. Find out what is inside your node modules and prevent malicious activity before you update the dependencies.

Install Socket
Socket[email protected]


Stay in touch

Get open source security insights delivered straight into your inbox.

  • Terms
  • Privacy
  • Security

Made with ⚡️ by Socket Inc