Cogear.JS is a static websites generator. It means that it compiles src folder (./src by default) data to static html and assets files to the output folder (./public by default).

Pages in src folder can be provided in various formats: .md,.pug,.html,.ejs,.hbs.

Then Webpack comes to play. It bundles app assets (basic ./src/app.js, theme ./theme.js or any custom script), packs all imported assets (other scripts, stylsheets, fonts, etc).

All external (remote) and internal (local or from node_modules) javascript modules should be imported from scripts.

When Webpack work is finished, pages are going on build.

Compiled pages are rendered through layouts, which are provided by site theme (or by src itself).

Bundled assets are injected during layout rendering.

In production or development modes static server is fired up to show the results.

Browser window opens.

In development mode watchers are being stared to reflect changes in pages, layouts and assets.


To build a static website Cogear.JS do next:

  1. Reads site config from ./config.yaml (.js,.json formats are also available).
  2. Searches src directory pages subfolder for pages. (default: ./src/pages)
  3. Preload pages. Available page formats: .md,.pug,.html,.ejs,.hbs. Parse metadata with yaml-front-matter.
  4. Fires up webpack server (in production mode) or webpack-dev-server (in dev mode, with hot-reload).
  5. Renders pages content with layouts (theme provided or ./src/layouts) to the output folder.
  6. Compiles assets and injects them into previousely built static html files.
    Assets are: js,coffee,css,sass,scss,stylus,less,Vue,jsx,fonts,images.
  7. Done.


Pages are build asynchronously (from v1.1.0).

Benchmarks show speed 1000 pages per second, est.

Speed depends on:

  • Pages count
  • Pages content
  • Webpack assets compilation time
  • Pages and layouts formats

Webpack processing also depends on imported modules count.

Development mode is also faster then Production or Build because:

  1. It doesn't compress assets.
  2. It doesn't minify assets.
  3. It stores all files in memory instead of filesystem.


Config is a simple JSON-file located at ./config.yaml.

title: Cogear.JS – modern static websites generator
theme: default

If page title is not defined then site config title will be used.

Pay attention to the theme property as it defines basic layout and can be also used to load scripts, styles and other assets.

Config data is available in runtime via cogear.config object. Usefull for plugins.

Deploy presets can also be stored in config. Read more


When Cogear.JS is called from command line it runs in development mode.

Development mode

> cogear # runs in devemopment mode by default

This mode peforms:

  1. Build pages and watch for changes.
  2. Start webpack-dev-server which will instantly update in-browser pages, scripts and styles on the fly with hot-reload module.


It handles all assets in memory (no output in real file system, don't panic).

Production mode

> cogear production # runs in production mode

This mode performs:

  1. Build pages.
  2. Assets compilation and injection to pages with Webpack.
  3. Starting local server to check out the results.


Build mode

> cogear build

Only build pages and perform Webpack assets compilation.


It should be called before deploy process in order output files to be built.

Deploy mode

> cogear deploy [preset]

Fires deploy process.


More info at Deploy page.


It's the place where all magic happens.

Basic structure:

├── app.js         # required, entry point
├── layouts        # optional
│   └── index.pug  # optional
└── pages          # required, site index page
    └──   # required, entry point

Required files are: app.js and pages/ (Markdown or any other format).

Basically it's all you need to build your first site.

Main script app.js

It's the entry point (Webpack term) which has to be injected in all the pages.

All you internal and external scripts may be imported there.


// Look at webpack-specific comments
// Either remote or local scripts, styles and other resources (like fonts) can be loaded
// You can even import your theme entry script if it's necessary
// `@` is an alias for current theme folder
// `#` is an alias for project root folder