修复 因 2.8.0-rc.11 导致的 tab 切换方法的问题；优化 element 代码细节

src/modules/element.js

@@ -10,7 +10,10 @@ layui.define('jquery', function(exports){
   var hint = layui.hint();
   var device = layui.device();
   
-  var MOD_NAME = 'element', THIS = 'layui-this', SHOW = 'layui-show';
+  var MOD_NAME = 'element';
+  var THIS = 'layui-this';
+  var SHOW = 'layui-show';
+  var TITLE = '.layui-tab-title';
   
   var Element = function(){
     this.config = {};
@@ -30,12 +33,11 @@ layui.define('jquery', function(exports){
   
   // 外部 Tab 新增
   Element.prototype.tabAdd = function(filter, options){
-    var TITLE = '.layui-tab-title'
-    ,tabElem = $('.layui-tab[lay-filter='+ filter +']')
-    ,titElem = tabElem.children(TITLE)
-    ,barElem = titElem.children('.layui-tab-bar')
-    ,contElem = tabElem.children('.layui-tab-content')
-    ,li = '<li'+ function(){
+    var tabElem = $('.layui-tab[lay-filter='+ filter +']');
+    var titElem = tabElem.children(TITLE);
+    var barElem = titElem.children('.layui-tab-bar');
+    var contElem = tabElem.children('.layui-tab-content');
+    var li = '<li'+ function(){
       var layAttr = [];
       layui.each(options, function(key, value){
         if(/^(title|content)$/.test(key)) return;
@@ -54,21 +56,22 @@ layui.define('jquery', function(exports){
   
   // 外部 Tab 删除
   Element.prototype.tabDelete = function(filter, layid){
-    var TITLE = '.layui-tab-title'
-    ,tabElem = $('.layui-tab[lay-filter='+ filter +']')
-    ,titElem = tabElem.children(TITLE)
-    ,liElem = titElem.find('>li[lay-id="'+ layid +'"]');
+    var tabElem = $('.layui-tab[lay-filter='+ filter +']');
+    var titElem = tabElem.children(TITLE);
+    var liElem = titElem.find('>li[lay-id="'+ layid +'"]');
     call.tabDelete(null, liElem);
     return this;
   };
   
   // 外部 Tab 切换
   Element.prototype.tabChange = function(filter, layid){
-    var TITLE = '.layui-tab-title'
-    ,tabElem = $('.layui-tab[lay-filter='+ filter +']')
-    ,titElem = tabElem.children(TITLE)
-    ,liElem = titElem.find('>li[lay-id="'+ layid +'"]');
-    call.tabClick.call(liElem[0], null, null, liElem);
+    var tabElem = $('.layui-tab[lay-filter='+ filter +']');
+    var titElem = tabElem.children(TITLE);
+    var liElem = titElem.find('>li[lay-id="'+ layid +'"]');
+
+    call.tabClick.call(liElem[0], {
+      liElem: liElem
+    });
     return this;
   };
   
@@ -77,7 +80,10 @@ layui.define('jquery', function(exports){
     options = options || {};
     dom.on('click', options.headerElem, function(e){
       var index = $(this).index();
-      call.tabClick.call(this, e, index, null, options);
+      call.tabClick.call(this, {
+        index: index,
+        options: options
+      });
     });
   };
   
@@ -111,9 +117,10 @@ layui.define('jquery', function(exports){
   // 基础事件体
   var call = {
     // Tab 点击
-    tabClick: function(e, index, liElem, options){
-      options = options || {};
-      var othis = liElem || $(this);
+    tabClick: function(obj){
+      obj = obj || {};
+      var options = obj.options || {};
+      var othis = obj.liElem || $(this);
       var parents = options.headerElem 
         ? othis.parent() 
       : othis.parents('.layui-tab').eq(0);
@@ -126,9 +133,9 @@ layui.define('jquery', function(exports){
       var filter = parents.attr('lay-filter');
 
       // 下标
-      index = index === undefined 
-        ? othis.parent().children('li').index(othis)
-      : index;
+      var index = 'index' in obj 
+        ? obj.index 
+      : othis.parent().children('li').index(othis);
       
       // 执行切换
       if(!(isJump || unselect)){
@@ -137,21 +144,24 @@ layui.define('jquery', function(exports){
       }
       
       layui.event.call(this, MOD_NAME, 'tab('+ filter +')', {
-        elem: parents
-        ,index: index
+        elem: parents,
+        index: index
       });
     }
     
     // Tab 删除
     ,tabDelete: function(e, othis){
-      var li = othis || $(this).parent(), index = li.index()
-      ,parents = li.parents('.layui-tab').eq(0)
-      ,item = parents.children('.layui-tab-content').children('.layui-tab-item')
-      ,filter = parents.attr('lay-filter');
+      var li = othis || $(this).parent();
+      var index = li.index();
+      var parents = li.parents('.layui-tab').eq(0);
+      var item = parents.children('.layui-tab-content>.layui-tab-item');
+      var filter = parents.attr('lay-filter');
       
       if(li.hasClass(THIS)){
         if (li.next()[0] && li.next().is('li')){
-          call.tabClick.call(li.next()[0], null, index + 1);
+          call.tabClick.call(li.next()[0], {
+            index: index + 1
+          });
         } else if (li.prev()[0] && li.prev().is('li')){
           call.tabClick.call(li.prev()[0], null, index - 1);
         }
@@ -164,8 +174,8 @@ layui.define('jquery', function(exports){
       }, 50);
       
       layui.event.call(this, MOD_NAME, 'tabDelete('+ filter +')', {
-        elem: parents
-        ,index: index
+        elem: parents,
+        index: index
       });
     }
     
@@ -512,14 +522,14 @@ layui.define('jquery', function(exports){
   
   Element.prototype.render = Element.prototype.init;
 
-  var element = new Element(), dom = $(document);
+  var element = new Element();
+  var dom = $(document);
   
   $(function(){
     element.render();
   });
 
-  var TITLE = '.layui-tab-title li';
-  dom.on('click', TITLE, call.tabClick); //Tab切换
+  dom.on('click', '.layui-tab-title li', call.tabClick); // Tab 切换
   dom.on('click', call.hideTabMore); // 隐藏展开的 Tab
   $(window).on('resize', call.tabAuto); // 自适应