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/*
* classList.js: Cross-browser full element.classList implementation.
* 1.2.20171210
*
* By Eli Grey, http://eligrey.com
* License: Dedicated to the public domain.
* See https://github.com/eligrey/classList.js/blob/master/LICENSE.md
*/
/*global self, document, DOMException */
/*! @source http://purl.eligrey.com/github/classList.js/blob/master/classList.js */
if ("document" in self) {
// Full polyfill for browsers with no classList support
// Including IE < Edge missing SVGElement.classList
if (
!("classList" in document.createElement("_"))
|| document.createElementNS
&& !("classList" in document.createElementNS("http://www.w3.org/2000/svg","g"))
) {
(function (view) {
"use strict";
if (!('Element' in view)) return;
var
classListProp = "classList"
, protoProp = "prototype"
, elemCtrProto = view.Element[protoProp]
, objCtr = Object
, strTrim = String[protoProp].trim || function () {
return this.replace(/^\s+|\s+$/g, "");
}
, arrIndexOf = Array[protoProp].indexOf || function (item) {
var
i = 0
, len = this.length
;
for (; i < len; i++) {
if (i in this && this[i] === item) {
return i;
}
}
return -1;
}
// Vendors: please allow content code to instantiate DOMExceptions
, DOMEx = function (type, message) {
this.name = type;
this.code = DOMException[type];
this.message = message;
}
, checkTokenAndGetIndex = function (classList, token) {
if (token === "") {
throw new DOMEx(
"SYNTAX_ERR"
, "The token must not be empty."
);
}
if (/\s/.test(token)) {
throw new DOMEx(
"INVALID_CHARACTER_ERR"
, "The token must not contain space characters."
);
}
return arrIndexOf.call(classList, token);
}
, ClassList = function (elem) {
var
trimmedClasses = strTrim.call(elem.getAttribute("class") || "")
, classes = trimmedClasses ? trimmedClasses.split(/\s+/) : []
, i = 0
, len = classes.length
;
for (; i < len; i++) {
this.push(classes[i]);
}
this._updateClassName = function () {
elem.setAttribute("class", this.toString());
};
}
, classListProto = ClassList[protoProp] = []
, classListGetter = function () {
return new ClassList(this);
}
;
// Most DOMException implementations don't allow calling DOMException's toString()
// on non-DOMExceptions. Error's toString() is sufficient here.
DOMEx[protoProp] = Error[protoProp];
classListProto.item = function (i) {
return this[i] || null;
};
classListProto.contains = function (token) {
return ~checkTokenAndGetIndex(this, token + "");
};
classListProto.add = function () {
var
tokens = arguments
, i = 0
, l = tokens.length
, token
, updated = false
;
do {
token = tokens[i] + "";
if (!~checkTokenAndGetIndex(this, token)) {
this.push(token);
updated = true;
}
}
while (++i < l);
if (updated) {
this._updateClassName();
}
};
classListProto.remove = function () {
var
tokens = arguments
, i = 0
, l = tokens.length
, token
, updated = false
, index
;
do {
token = tokens[i] + "";
index = checkTokenAndGetIndex(this, token);
while (~index) {
this.splice(index, 1);
updated = true;
index = checkTokenAndGetIndex(this, token);
}
}
while (++i < l);
if (updated) {
this._updateClassName();
}
};
classListProto.toggle = function (token, force) {
var
result = this.contains(token)
, method = result ?
force !== true && "remove"
:
force !== false && "add"
;
if (method) {
this[method](token);
}
if (force === true || force === false) {
return force;
} else {
return !result;
}
};
classListProto.replace = function (token, replacement_token) {
var index = checkTokenAndGetIndex(token + "");
if (~index) {
this.splice(index, 1, replacement_token);
this._updateClassName();
}
}
classListProto.toString = function () {
return this.join(" ");
};
if (objCtr.defineProperty) {
var classListPropDesc = {
get: classListGetter
, enumerable: true
, configurable: true
};
try {
objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
} catch (ex) { // IE 8 doesn't support enumerable:true
// adding undefined to fight this issue https://github.com/eligrey/classList.js/issues/36
// modernie IE8-MSW7 machine has IE8 8.0.6001.18702 and is affected
if (ex.number === undefined || ex.number === -0x7FF5EC54) {
classListPropDesc.enumerable = false;
objCtr.defineProperty(elemCtrProto, classListProp, classListPropDesc);
}
}
} else if (objCtr[protoProp].__defineGetter__) {
elemCtrProto.__defineGetter__(classListProp, classListGetter);
}
}(self));
}
// There is full or partial native classList support, so just check if we need
// to normalize the add/remove and toggle APIs.
(function () {
"use strict";
var testElement = document.createElement("_");
testElement.classList.add("c1", "c2");
// Polyfill for IE 10/11 and Firefox <26, where classList.add and
// classList.remove exist but support only one argument at a time.
if (!testElement.classList.contains("c2")) {
var createMethod = function(method) {
var original = DOMTokenList.prototype[method];
DOMTokenList.prototype[method] = function(token) {
var i, len = arguments.length;
for (i = 0; i < len; i++) {
token = arguments[i];
original.call(this, token);
}
};
};
createMethod('add');
createMethod('remove');
}
testElement.classList.toggle("c3", false);
// Polyfill for IE 10 and Firefox <24, where classList.toggle does not
// support the second argument.
if (testElement.classList.contains("c3")) {
var _toggle = DOMTokenList.prototype.toggle;
DOMTokenList.prototype.toggle = function(token, force) {
if (1 in arguments && !this.contains(token) === !force) {
return force;
} else {
return _toggle.call(this, token);
}
};
}
// replace() polyfill
if (!("replace" in document.createElement("_").classList)) {
DOMTokenList.prototype.replace = function (token, replacement_token) {
var
tokens = this.toString().split(" ")
, index = tokens.indexOf(token + "")
;
if (~index) {
tokens = tokens.slice(index);
this.remove.apply(this, tokens);
this.add(replacement_token);
this.add.apply(this, tokens.slice(1));
}
}
}
testElement = null;
}());
}
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