Built-in

Webpack modules support the following module dependency definition statement:

• import statement of ES2015
• require() statement of CommonJS
• define and require statement of an AMD
• @import statement inside of a css/sass/less file.
• An image url in a stylesheet (url(…)) or html (<img src=...>) file.

Loader

Webpack supports modules written in a variety of languages and preprocessors, via loaders.