update-wpd-docs 
Creates a comprehensive JSON file of selected WebPlatform Docs data, mostly for offline use.
Installation
[sudo] npm install
Usage
[sudo] node update-wpd-docs --output <path to output json> [--lowercase-keys] [--exclude-vendor-prefixed] [--path <comma-separated list of paths>]
Config
You can create a config.json file with the keys output, paths, lowercase-keys and vendor-prefixes. You can also define aliases in there and use them like this:
[sudo] node update-wpd-docs <alias>