Hotjar tracking for GitBook

It is available as NPM package:

$ npm i gitbook-plugin-hotjar --save

Within book.json we have:

{
    "plugins": ["hotjar"]
}

It is simple to set Hotjar analytics ID using the plugins configuration in the book.json:

{
    "plugins": ["hotjar"],
    "pluginsConfig": {
        "hotjar": {
            "hjid": 01234567
        }
    }
}