Javascript debounce. Ejecuta la funcion después de X milisegundos. FROM: https://davidwalsh.name/javascript-debounce-function
function debounce(func, wait, immediate) {
var timeout;
return function () {
var context = this, args = arguments,
later = function () {
timeout = null;
if (!immediate) {
func.apply(context, args);
}
},
callNow = immediate && !timeout;
clearTimeout(timeout);
timeout = setTimeout(later, wait);
if (callNow) {
func.apply(context, args);
}
};
}