Ajax POST happens multiple times per page load.

Problem/Motivation

The javascript is triggered multiple times per page load, which in turn makes an ajax call to /timezone-detect/ajax/set-timezone

The problem is drupalBehaviors is executed multiple times on the page, before /timezone-detect/ajax/set-timezone has a chance to finish.

The ajax request should only happen, at max, once per page load.

Proposed resolution

Either use once() or $( document ).ready() when making the ajax call, to ensure it only happens once per page load.