google-analytics-protocol.js

A tiny library that reimplements Google Analytics calls using the Google Analytics Measurement Protocol.

Why?

Google's own analytics JS file requires a number of browser features, like cookies and XHR. Service Workers do not have access to cookies, localStorage and the like, and we also want to be more deliberate about versioning and caching when it comes to Service Workers. So this is a "fresh" rewrite, using fetch and IndexedDB.

Requirements

Since this is designed for use inside Service Workers I haven't added any shims for older browsers. So it requires IndexedDB, fetch and Promise support.

Additional features

Again, given the Service Worker nature of what we're doing, it caches analytics calls inside the IndexedDB, so if it cannot connect to the GA server it'll store requests offline and try the next time an analytics call is made.

How do I use it?

The actual call itself is very basic and uses the attributes specified in the protocol reference.

Use setAnalyticsID() to specify your ID before trying to send any calls.

import Analytics from 'google-analytics-protocol';

Analytics.setAnalyticsID(GA_ID);

Analytics({
    t: 'pageview',
    dh: 'localhost.com',
    dp: '/index.html'
})