debounce in js

debounce.js

// from underscore.js
// Returns a function, that, as long as it continues to be invoked, will not
// be triggered. The function will be called after it stops being called for
// [wait] milliseconds. If `immediate` is passed, trigger the function on the
// leading edge, instead of the trailing.
function debounceOG(func, wait, immediate) {
	var timeout;
	return function() {
		var context = this, args = arguments;
		var later = function() {
			timeout = null;
			if (!immediate) func.apply(context, args);
		};
		var callNow = immediate && !timeout;
		clearTimeout(timeout);
		timeout = setTimeout(later, wait);
		if (callNow) func.apply(context, args);
	};
};

// debounce without the option to call immediately
function debounce(fn, wait) {
  var timeout;
	return function() {
		var context = this, args = arguments;
		var later = function() {
			timeout = null;
			fn.apply(context, args);
		};
		clearTimeout(timeout);
		timeout = setTimeout(later, wait);
	};
}

// create
var taxingCalc = debounce(function() {
	// All the taxing stuff you do
}, 500);

// apply
window.addEventListener('resize', taxingCalc);