Issue 6104 - Minified code in help center repository

src/js/vendor/classList.js

Index: src/js/vendor/classList.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/src/js/vendor/classList.js
@@ -0,0 +1,263 @@
+/*!
+ * classList.js: Cross-browser full element.classList implementation.
+ * 1.2.201711092
+ *
+ * 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;
+  }());
+  
+  }