Updated documentation to recommend discoverRootDomain as default

If the tracker is implemented across various root domains, it feel like there should be an option to set the cookie domain dynamically, so that you can easily deploy the tracker across, eg:

www.mysite.com blog.mysite.com www.mysite.co.uk application.mysite.co.uk etc

Currently, we add this to the tracker tag:

function getDomain(url, subdomain) {
    subdomain = subdomain || false;
    url = url.replace(/(https?:\/\/)?(www.)?/i, '');

    if (!subdomain) {
        url = url.split('.');
        url = url.slice(url.length - 2).join('.');
    }

    if (url.indexOf('/') !== -1) {
        return url.split('/')[0];
    }

    return url;
};

var cookieDomain = (".").concat(getDomain(window.location.href));

and then:

(...)
cookieDomain: cookieDomain;
(...)

Maybe this should be the default?

[mhadam]

Updated documentation in this wiki fork: mhadam/snowplow.wiki-fork@a963df2

[alexanderdean]

Ace, thanks