feat: remove unused functions (#1590)

_includes/head.html

@@ -42,7 +42,6 @@
     {% endif %}
 
     <script data-cfasync="false" src="//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
-    <script data-cfasync="false" src="/js/ismobile.js"></script>
     <script data-cfasync="false" src="/js/app.js"></script>
     <script data-cfasync="false" defer src="/js/menu.js"></script>
     <script data-cfasync="false" src="/js/retina.js"></script>  

js/app.js

@@ -5,7 +5,6 @@
 
 $(function(){
   var doc = $(document);
-  var lang = document.location.pathname.split('/')[1]
 
   // top link
   $('#top').click(function(e){
@@ -26,34 +25,6 @@ $(function(){
     }
   })
 
-  // edit page link
-  var latest = '';
-  var branchPath = 'https://github.com/expressjs/expressjs.com';
-  var pathName = document.location.pathname;
-
-  var currentVersion = (pathName.match(/^(?:\/[a-z]{2})?\/([0-9]x|)/) || [])[1] || '4x'; // defaults to current version
-  var fileName = pathName.split('/').splice(-2)[1];
-  var pagePath;
-  var editPath;
-
-  // the api doc cannot be edited individually, we'll have to link to the dir instead
-  if (fileName == 'api.html') {
-    editPath = branchPath + '/tree/gh-pages/_includes/api/en/'+ currentVersion;
-  }
-  // link to individual doc files
-  else {
-    pagePath = pathName.replace(/\.html$/, '.md');
-    editPath = branchPath + '/blob/gh-pages' + pagePath;
-  }
-
-  var editLink;
-
-  if (lang === 'en') {
-    if (pathName == '/') editLink = '<a href="' + branchPath + '">Fork the website on GitHub</a>.';
-    else editLink = '<a href="' + editPath + '">Edit this page on GitHub</a>.';
-    $('#fork').html(editLink);
-  }
-
   // code highlight
 
   $('code.language-js').each(function(){
@@ -68,9 +39,6 @@ $(function(){
 
   // menu bar
 
-  var prev;
-  var n = 0;
-
   var headings = $('h2, h3').map(function(i, el){
     return {
       top: $(el).offset().top - 200,
@@ -99,50 +67,25 @@ $(function(){
   });
 
   $(document).scroll(function() {
-
     var h = closest();
     if (!h) return;
 
+    currentApiPrefix = h.id.split('.')[0];
+    parentMenuSelector = '#'+ currentApiPrefix + '-menu';
 
-    if (window.location.pathname == '/3x/api.html') {
-
-      if (prev) {
-      prev.removeClass('active');
-      prev.parent().parent().removeClass('active');
-      }
-      var a = $('a[href="#' + h.id + '"]');
-      a.addClass('active');
-      a.parent().parent().addClass('active');
-      prev = a;
+    $(parentMenuSelector).addClass('active');
 
+    if (lastApiPrefix && (lastApiPrefix != currentApiPrefix)) {
+      $('#'+ lastApiPrefix + '-menu').removeClass('active');
     }
 
-    else {
-
-      currentApiPrefix = h.id.split('.')[0];
-      parentMenuSelector = '#'+ currentApiPrefix + '-menu';
-
-      $(parentMenuSelector).addClass('active');
-
-      if (lastApiPrefix && (lastApiPrefix != currentApiPrefix)) {
-        $('#'+ lastApiPrefix + '-menu').removeClass('active');
-      }
-
-      $('#menu li a').removeClass('active');
+    $('#menu li a').removeClass('active');
 
-      var a = $('a[href="#' + h.id + '"]');
-      a.addClass('active');
-
-      lastApiPrefix = currentApiPrefix.split('.')[0];
-
-    }
+    var a = $('a[href="#' + h.id + '"]');
+    a.addClass('active');
 
+    lastApiPrefix = currentApiPrefix.split('.')[0];
   })
-  $('#tags-side-menu li').on('click', function() {
-      // Remove prev 'active's 
-      $(this).next().siblings().removeClass('active');
-      $(this).next().addClass('active')
-    })
 
   // i18n notice
   if (readCookie('i18nClose')) {
@@ -154,7 +97,6 @@ $(function(){
       createCookie('i18nClose', 1);
     })
   }
-
 })