* merge PullRequest(fixed 'HTMLElement undefined' error) Thanks @ChangJin0520

   * merge PullRequest(Add TypeScript type definition)     Thanks @Itroads
   * fixed awesomeStyle    Thanks @Jermyk93

Author: ztree

README.md

@@ -1,6 +1,6 @@
 jQuery Tree Plugin ---- zTree  
 ============
-last verson :  3.5.41
+last verson :  3.5.42
 
 
 **Donate to zTree** : http://www.treejs.cn/v3/donate.php
@@ -11,10 +11,6 @@ zTree API : http://www.treejs.cn/v3/api.php
 
 zTree Demo : http://www.treejs.cn/v3/demo.php
 
-### INSTALL
-```
-npm install @ztree/ztree_v3
-```
 
 Introduction of zTree (简介)
 ============

api/API_cn.html

@@ -35,7 +35,7 @@
 				<div class="ieSuggest">浏览本网站建议您使用 Chrome、FireFox、Opera、IE9 等浏览器（只要不是 IE6 7 8 就行）, 速度会更快，画面会更炫！</div>
 				<div class="google_plus"><g:plusone></g:plusone></div>
 				<div class="header-text">
-					<h1><em>zTree v3.5.41 API 文档</em></h1><p></p>
+					<h1><em>zTree v3.5.42 API 文档</em></h1><p></p>
 					<p>all.js = core + excheck + exedit ( 不包括 exhide ); 发现错误请及时通知，谢谢。</p>
 				</div>
 				<ul class="shortcuts language" style="top:0;">

api/API_en.html

@@ -34,7 +34,7 @@
 				<div class="ieSuggest">If you use the Chrome / FireFox / Opera / IE9 browser will be even more dazzling effect!</div>
 				<div class="google_plus"><g:plusone></g:plusone></div>
 				<div class="header-text">
-					<h1><em>zTree v3.5.41 API Document</em></h1><p></p>
+					<h1><em>zTree v3.5.42 API Document</em></h1><p></p>
 					<p>all.js = core + excheck + exedit ( without exhide ); if you found some mistakes please contact me.</p>
 				</div>
 				<ul class="shortcuts language" style="top:0;">

api/apiCss/jquery.ztree.core.js

@@ -216,7 +216,7 @@ website:    http://code.google.com/p/jquerytree/
   display: inline-block;
 }
 .ztree li span.button.root_close::before {
-  content: "\f115";
+  content: "\f054";
   padding-top: 10px;
   padding-left: 2px;
   display: inline-block;

css/awesomeStyle/awesome.css

@@ -93,7 +93,7 @@ website:    http://code.google.com/p/jquerytree/
             }
             &.switch  {width:@w; height:@h}
             &.root_open::before{content: @fa-chevron-down;padding-top:@pad-top;padding-left:@pad-left;display: inline-block;}
-            &.root_close::before{content: @fa-folder-open-o;padding-top:@pad-top;padding-left:@pad-left;display: inline-block;}
+            &.root_close::before{content: @fa-chevron-right;padding-top:@pad-top;padding-left:@pad-left;display: inline-block;}
             &.roots_open::before{content: @fa-chevron-down;padding-top:@pad-top;padding-left:@pad-left;display: inline-block;}
             &.roots_close::before{content: @fa-chevron-right;padding-top:@pad-top;padding-left:@pad-left;display: inline-block;}
             &.center_open::before{content: @fa-chevron-down;padding-top:@pad-top;padding-left:@pad-left;display: inline-block;}

css/awesomeStyle/awesome.less

@@ -1,15 +1,16 @@
-
 /*
- * JQuery zTree core v3.5.41
+ * JQuery zTree core
+ * v3.5.42
  * http://treejs.cn/
  *
  * Copyright (c) 2010 Hunter.z
  *
  * Licensed same as jquery - MIT License
  * http://www.opensource.org/licenses/mit-license.php
  *
- * Date: 2020-01-06
+ * Date: 2020-01-19
  */
+
 (function ($) {
   var settings = {}, roots = {}, caches = {},
     //default consts of core
@@ -1358,7 +1359,7 @@
           var icon = (isParent && node.iconOpen && node.iconClose) ? (node.open ? node.iconOpen : node.iconClose) : node[setting.data.key.icon];
           if (icon) icoStyle.push("background:url(", icon, ") 0 0 no-repeat;");
           if (setting.view.showIcon == false || !tools.apply(setting.view.showIcon, [setting.treeId, node], true)) {
-            icoStyle.push("width:0px;height:0px;");
+            icoStyle.push("display:none;");
           }
         }
         return icoStyle.join('');
@@ -1430,8 +1431,8 @@
         if (!dom) {
           return;
         }
-        // support IE 7
-        if (typeof Element === 'undefined') {
+        // support IE 7 / 8
+        if (typeof Element === 'undefined' || typeof HTMLElement === 'undefined') {
           var contRect = setting.treeObj.get(0).getBoundingClientRect(),
             findMeRect = dom.getBoundingClientRect();
           if (findMeRect.top < contRect.top || findMeRect.bottom > contRect.bottom
@@ -1985,16 +1986,18 @@
     consts = zt.consts;
 })(jQuery);
 /*
- * JQuery zTree excheck v3.5.41
+ * JQuery zTree excheck
+ * v3.5.42
  * http://treejs.cn/
  *
  * Copyright (c) 2010 Hunter.z
  *
  * Licensed same as jquery - MIT License
  * http://www.opensource.org/licenses/mit-license.php
  *
- * Date: 2020-01-06
+ * Date: 2020-01-19
  */
+
 (function ($) {
   //default consts of excheck
   var _consts = {
@@ -2635,16 +2638,18 @@
   }
 })(jQuery);
 /*
- * JQuery zTree exedit v3.5.41
+ * JQuery zTree exedit
+ * v3.5.42
  * http://treejs.cn/
  *
  * Copyright (c) 2010 Hunter.z
  *
  * Licensed same as jquery - MIT License
  * http://www.opensource.org/licenses/mit-license.php
  *
- * Date: 2020-01-06
+ * Date: 2020-01-19
  */
+
 (function ($) {
   //default consts of exedit
   var _consts = {
@@ -3835,4 +3840,4 @@
     }
     return (!root.curEditNode) && (_uCanDo ? _uCanDo.apply(view, arguments) : true);
   }
-})(jQuery);
+})(jQuery);