Issue 5692 - Create Browser Selector with Browser Detection Component for help.eyeo.com

static/js/main.js

-(function(){
+(function()
+{
   document.addEventListener("DOMContentLoaded", function()
   {
 
     /**************************************************************************
      * General
      **************************************************************************/
 
     // Change html class name from "no-js" to "js"
     document.documentElement.className = "js";
 
@@ skipping 19 matching lines @@
     }
 
     /**************************************************************************
      * CustomSelect
      **************************************************************************/
 
     function CustomSelect(select)
     {
       this.select = select;
       this.close();
-      select.addEventListener("click", this._onClick.bind(this), false);
+      this.select
+          .addEventListener("click", this._onClick.bind(this), false);
+      this.select
+          .addEventListener("focusout", this._onFocusOut.bind(this), false);
+    }
+
+    CustomSelect.prototype._onFocusOut = function()
+    {
+      // setTimeout to allow document.activeElement 
+      // to move to newly focused element
+      setTimeout(function()
+      {
+        var newFocus = document.activeElement;
+        
+        if (newFocus
+              .classList.contains("custom-select-selected") ||
+            newFocus
+              .classList.contains("custom-select-option") ||
+            newFocus
+              .parentElement
+              .classList.contains("custom-select-option"))
+        {
+          return;
+        }
+
+        this.close();
+        
+      }.bind(this), 1);
     }
 
     CustomSelect.prototype._onClick = function(event)
     {
       if (event.target.classList.contains("custom-select-selected"))
       {
         var options = this.select.querySelector(".custom-select-options");
         if (options.getAttribute("aria-hidden") == "true")
         {
           this.open();
@@ skipping 146 matching lines @@
     {
       new Accordion(productTopicsAccordion);
     }
 
     /**************************************************************************
      * BrowserSelect
      **************************************************************************/
 
     function BrowserSelect(select)
     {
-      this.browserSelect = select;
-      this.browserCustomSelect = new CustomSelect(this.browserSelect);
-      
-      this.DEFAULT_BROWSER = "chrome";
+      this.select = select;
+      CustomSelect.apply(this, [this.select]);
+      
       this.BROWSER_STORAGE_KEY = "BROWSER";
       this.BROWSER_AUTODETECTED_STORAGE_KEY = "BROWSER_AUTODETECTED";
-      
-      this.browserSelect
+      this.SUPPORTED_BROWSERS = ["chrome", "opera", "samsungBrowser", 
+                                 "yandexbrowser", "maxthon", "msie", 
+                                 "msedge", "firefox", "ios", "safari"];
+      this.DEFAULT_BROWSER = "chrome";
+      
+      this.select
         .addEventListener("click", this._onClickOrKeyDown.bind(this), false);
       
-      this.browserSelect
+      this.select
         .addEventListener("keydown", this._onClickOrKeyDown.bind(this), false);
 
       var storedBrowser = localStorage.getItem(this.BROWSER_STORAGE_KEY);
-      if (storedBrowser)
-      {
-        this.selectOption(storedBrowser);
-      }
-      else
-      {
-        this.detectBrowser();
-      }
-    }
+      if (storedBrowser) this.selectOption(storedBrowser);
+      else this.detectBrowser();
+    }
+
+    BrowserSelect.prototype = Object.create(CustomSelect.prototype);
+    BrowserSelect.prototype.constructor = BrowserSelect;
 
     BrowserSelect.prototype.detectBrowser = function()
     {
-      localStorage.setItem(this.BROWSER_AUTODETECTED_STORAGE_KEY, "true");
-
-      var browser;
-      if (bowser.chrome) browser = "chrome";
-      else if (bowser.opera) browser = "opera";
-      else if (bowser.coast) browser = "opera";
-      else if (bowser.samsungBrowser) browser = "samsung";
-      else if (bowser.yandexbrowser) browser = "yandex";
-      else if (bowser.maxthon) browser = "maxthon";
-      else if (bowser.msie) browser = "ie";
-      else if (bowser.msedge) browser = "edge";
-      else if (bowser.firefox) browser = "firefox";
-      else if (bowser.ios) browser = "ios";
-      else if (bowser.safari) browser = "safari";
-      else
-      {
-        localStorage.removeItem(this.BROWSER_AUTODETECTED_STORAGE_KEY);
-        browser = this.DEFAULT_BROWSER;
-      }
-
-      this.selectOption(browser);  
-    }
+      for (var i = 0; i < this.SUPPORTED_BROWSERS.length; i++)
+      {
+        var supportedBrowser = this.SUPPORTED_BROWSERS[i];
+        if (bowser[supportedBrowser])
+        {
+          localStorage.setItem(this.BROWSER_AUTODETECTED_STORAGE_KEY, "true");
+          return this.selectOption(supportedBrowser);
+        }
+      }
+
+      this.selectOption(this.DEFAULT_BROWSER);  
+    };
 
     BrowserSelect.prototype.selectOption = function(browser)
     {
-      // Save value to Local Storage
       localStorage.setItem(this.BROWSER_STORAGE_KEY, browser);
 
       // Change body class
       var bodyClassList = Array.prototype.slice.call(document.body.classList);
       for (var i = 0; i < bodyClassList.length; i++)
       {
         if (bodyClassList[i].indexOf('ua-') > -1)
         {
           document.body.classList.remove(bodyClassList[i]);
         }
       }
       document.body.classList.add("ua-" + browser);
 
       // Check selected option
-      var selectedItem = this.browserSelect
+      var selectedItem = this.select
                              .querySelector("[data-value='" + browser + "']");
       selectedItem.setAttribute("aria-checked", "true");
 
       // Set selected option
-      var selectedOption = document.createElement("li");
-      selectedOption.innerHTML = selectedItem.innerHTML;
+      var selectedOption = selectedItem.innerHTML;
 
       if (localStorage.getItem(this.BROWSER_AUTODETECTED_STORAGE_KEY))
       {
         var autodetected = document
                               .getElementById('browser-select-autodetected')
                               .innerHTML;
-        selectedOption.innerHTML += "<span class='muted'>(" + autodetected + ")</span>";
-      }
-
-      this.browserSelect
+        selectedOption += "<span class='muted'>(" + autodetected + ")</span>";
+      }
+
+      this.select
           .querySelector(".custom-select-selected")
-          .innerHTML = selectedOption.innerHTML;
-    }
+          .innerHTML = selectedOption;
+    };
 
     BrowserSelect.prototype._onClickOrKeyDown = function(event)
     {
       if (!event.target.classList.contains("custom-select-option")) return;
 
       var IS_ENTER_KEY = event.key == "Enter" || event.keyCode == 13;
       if (event.keyCode && !IS_ENTER_KEY) return;
 
       localStorage.removeItem(this.BROWSER_AUTODETECTED_STORAGE_KEY);
 
       // Uncheck previously checked option
-      this.browserSelect
+      this.select
           .querySelector("[aria-checked='true']")
           .setAttribute("aria-checked", "false");
 
       this.selectOption(event.target.getAttribute("data-value"));
 
-      // Close Select
-      this.browserCustomSelect.close();
-    }
+      this.close();
+    };
 
     var browserSelect = document.getElementById("browser-select");
     if (browserSelect)
     {
       new BrowserSelect(browserSelect);
     }
 
   }, false);
 }());