JavaScript/JQuery: $(window).resize how to fire AFTER the resize is completed?

Question

I'm using JQuery as such:

$(window).resize(function() { ... });

However, it appears that if the person manually resizes their browser windows by dragging the window edge to make it larger/smaller, the .resize event above fires multiple times.

Question: How to I call a function AFTER the browser window resize completed (so that the event only fires once)?

Answer 1

Here's a modification of CMS's solution that can be called in multiple places in your code:

var waitForFinalEvent = (function () {
  var timers = {};
  return function (callback, ms, uniqueId) {
    if (!uniqueId) {
      uniqueId = "Don't call this twice without a uniqueId";
    }
    if (timers[uniqueId]) {
      clearTimeout (timers[uniqueId]);
    }
    timers[uniqueId] = setTimeout(callback, ms);
  };
})();

Usage:

$(window).resize(function () {
    waitForFinalEvent(function(){
      alert('Resize...');
      //...
    }, 500, "some unique string");
});

CMS's solution is fine if you only call it once, but if you call it multiple times, e.g. if different parts of your code set up separate callbacks to window resizing, then it will fail b/c they share the timer variable.

With this modification, you supply a unique id for each callback, and those unique IDs are used to keep all the timeout events separate.