Throttle $.ajax calls

throttle.js

define(['jquery'], function ($) {

  var THROTTLE = 200; // ms
  var previousCalls = {}; // for namespaces

  var throttle = function (name, ajaxOpts) {
 
    var now = new Date();
    previousCalls[name] = now;

    var checkPreviousCalls = function () {
      // has something else touched our namespace since timeout?
      if (previousCalls[name] !== now) {
        console.log('THROTTLE ' + ajaxOpts.url);
      } else {
        console.log('CALL ' + ajaxOpts.url);
        $.ajax(ajaxOpts);
      }
    };

    setTimeout(checkPreviousCalls, THROTTLE);

  };

  return throttle;

});

Example usage:

require(['throttle'], function (throttle) {
  var ajaxOpts = {
    url: 'https://cors-test.appspot.com/test',
    success: function () { console.log('2 × THROTTLE, 1 × CALL. Amirite?') }
  }
  throttle('amirite?', ajaxOpts);
  throttle('amirite?', ajaxOpts);
  throttle('amirite?', ajaxOpts);
});