If you'd like to contribute to the noUiSlider documentation (yes please!), you can run it locally using PHP's built in web server:

Clone the project (for example, in C:/Web):

git clone https://github.com/leongersen/noUiSlider nouislider

You can now run the following shorthand to start the server:

npm run docs

You can now access the documentation at http://localhost/nouislider/.

Alternatively, in your root (e.g. C:/Web), start the server:

php -S localhost:80 nouislider/documentation/_run/router.php

The documentation uses noUiSlider from the dist folder, so you can test any changes you've made to the main source in the documentation after running npm run build.