Class.js

/*
dependencies
	isArray
	defineProperties
TODO
        defineProperties > defineProperty
	  http://stackoverflow.com/a/17935125/248058
	isString
	clear
	  typeof this.className === 'object' ? this.setAttribute('class', '') : this.className = '';
	  http://stackoverflow.com/a/7167553/248058
	regex
*/

var	element =  window.Element || window.HTMLElement,
	elementPrototype = (element && element.prototype) || window['[[DOMElement.prototype]]'];

elementPrototype.hasClass = function(className) {
  var classes = typeof this.className === 'object' ? this.className.baseVal : this.className
    , classList;

  String.parseAsClass(className);
  if (!classes)
    return false;
  if (classes === className)
    return true;
  if (this.classList)
    return this.classList.contains(className);
  classList = classes.split(/[ \t\n\f\r\u200b]+/);
  for (var i = 0, len = classList.length; i < len; ++i) {
    if (classList[i] === className)
      return true;
  }
  return false;
};

elementPrototype.hasClasses = function(classes) {
  var i
    , arg = arguments
    , len = arg.length;

  if (!len)
    throw new TypeError('The first argument is required.');
  if (len === 1) {
    arg = Array.isArray(classes) ? classes : classes.split(/[ \t\n\f\r\u200b]+/);
    len = arg.length;
  }
  for (i = 0; i < len; ++i) {
    if (arg[i] && !this.hasClass(arg[i]))
      return false;
  }
  return true;
};

elementPrototype.addClass = function(className, bypass) {
  if (bypass || !this.hasClass(className)) {
    if (this.classList)
      this.classList.add(className);
    else if (typeof this.className === 'object')
      this.setAttribute('class', this.className.baseVal ? this.className.baseVal + ' ' + className : className);
    else
      this.className += (this.className && ' ') + className;
  }
  return this;
};

elementPrototype.addClasses = function(classes) {
  var i
    , arg = arguments
    , len = arg.length;

  if (!len)
    throw new TypeError('The first argument is required.');
  if (len === 1) {
    arg = Array.isArray(classes) ? classes : classes.split(/[ \t\n\f\r\u200b]+/);
    len = arg.length;
  }
  for (i = 0; i < len; ++i) {
    if (arg[i])
      this.addClass(arg[i]);
  }
  return this;
};

elementPrototype.delClass = function(className, bypass) {
  var classes   = typeof this.className === 'object' ? this.className.baseVal : this.className
    , tokenSet  = ''
    , classList;

  if (!bypass)
    String.parseAsClass(className);
  if (classes) {
    if (this.classList)
      this.classList.remove(className);
    else {
      classList = classes.split(/[ \t\n\f\r\u200b]+/);
      for (var i = 0, len = classList.length; i < len; ++i) {
        if (classList[i] && classList[i] !== className)
          tokenSet += (tokenSet && ' ') + classList[i];
      }
      if (tokenSet !== classes)
        this.className.baseVal ? this.setAttribute('class', tokenSet) : this.className = tokenSet;
    }
  }
  return this;
};

elementPrototype.delClasses = function(classes) {
  var i
    , arg = arguments
    , len = arg.length;

  if (!len)
    throw new TypeError('The first argument is required.');
  if (len === 1) {
    arg = Array.isArray(classes) ? classes : classes.split(/[ \t\n\f\r\u200b]+/);
    len = arg.length;
  }
  for (i = 0; i < len; ++i) {
    if (arg[i])
      this.delClass(arg[i]);
  }
  return this;
};

elementPrototype.toggleClass = function(className, force) {
  var hasClass = this.hasClass(className);

  if (typeof force !== 'undefined' && !hasClass === !force)
    return force;
  this[hasClass ? 'delClass' : 'addClass'](className, true);
  return !hasClass;
};

elementPrototype.replaceClass = function(oldClass, newClass) {
  String.parseAsClass(oldClass);
  if (this.hasClass(newClass) || oldClass === newClass)
    return this;
  this.delClass(oldClass, true);
  this.addClass(newClass, true);
  return this;
};

Object.defineProperties && Object.defineProperties(elementPrototype, {
  'hasClass':			{ enumerable: false },
  'hasClasses':		{ enumerable: false },
  'addClass':			{ enumerable: false },
  'addClasses':		{ enumerable: false },
  'delClass':			{ enumerable: false },
  'delClasses':		{ enumerable: false },
  'toggleClass':	{ enumerable: false },
  'replaceClass':	{ enumerable: false }
});

// http://blog.stchur.com/2008/01/24/accessing-the-native-domelements-prototype-in-safari-2/
document.getElementsByTagName('html')[0];
document.createElement("iframe");

// https://gist.github.com/jonathantneal/5ca2cf0d5b0c39c2450d

/*@cc_on@if(@_jscript_version<5.8)
	if (!self.document.querySelector) {
		(self.HTMLElement = self.Element = function HTMLElement() {}).prototype = self.document.createElement('HTMLElement');

		self.HTMLElement.prototype.attachEvent('onpropertychange', function (event) {
			for (var name = event.propertyName, value = prototype[event.propertyName], all = self.HTMLElement.document.all, index = 0; element = all[index]; ++index) {
				if (element !== self.HTMLElement) {
					element[name] = value;
				}
			}
		});
	}
@end@*/

//multiple
https://github.com/eligrey/classList.js/blob/master/classList.js#L217 toggle
https://github.com/eligrey/classList.js/blob/master/classList.js#L196 add/remove
https://gist.github.com/termi/3952026
http://stackoverflow.com/a/23316665/248058

//defineProperty
http://johndyer.name/native-browser-get-set-properties-in-javascript/

// private get
https://github.com/Leaflet/Leaflet/blob/fb6b4776c6a2b5c3d5d8d5e6dff0678e989fb325/src/dom/DomUtil.js#L127

//SVG
setAttribute('attribute', 'value', 0) // https://msdn.microsoft.com/en-us/library/ms536739(v=vs.85).aspx
https://bugs.webkit.org/show_bug.cgi?id=20651
https://bugs.webkit.org/show_bug.cgi?id=22357
http://stackoverflow.com/a/28453739/248058

//isArray
http://web.mit.edu/jwalden/www/isArray.html
https://gist.github.com/atk/1034882