如何可靠地检查Google Analytics（分析）？

Question

It used to be so simple - this was all that was needed to ensure you could go ahead and track a user's click or whatever:

if ('ga' in window && window.ga !== undefined && typeof window.ga === 'function') {
...

Now, Firefox's 'tracking protection' is here, and that doesn't work. Why? Well, even though the Firefox JS console claims

The resource at " https://www.google-analytics.com/analytics.js " was blocked because tracking protection is enabled.

The 'if' test above still returns true. So, I ask you, how can I reliably check if Google Analytics is available?

Answer 1

One option would be to check that the GA tracker has been created:

ga(function() {
  // Logs an array of all tracker objects.
  console.log(ga.getAll());
});

(cf. getAll() method )