jQuery Debounce

debounce.jquery.js

var validation_debounce_timeout;
$.fn.debounce = function(callback, delay) {
	$this = $(this);

	clearTimeout(validation_debounce_timeout);

	validation_debounce_timeout = setTimeout(function() {
		callback();
	}, delay);
}

// You must refer to "this" input as $this in callback function, like so:
$('input').debounce(function() {
	console.log($this.val());
}, 700);