Usefull Vanilla functions

vanilla.js

var isMobile = function() {
	return !!navigator.userAgent.match(/Android|BlackBerry|BB10; Touch|iPhone|iPad|iPod|Opera Mini|IEMobile/i);
};

Array.prototype.clone = function () {
	return Array.prototype.slice.call(this, 0);
};

Array.prototype.clear = function() {
	this.length = 0;
	return this;
};

// Remove an item of array
Array.prototype.remove = function(from, to) {
  var rest = this.slice((to || from) + 1 || this.length);
  this.length = from < 0 ? this.length + from : from;
  return this.push.apply(this, rest);
};