修复sidebar弹出后，背景主体可以滚动的bug (#752)

* 修复sidebar弹出后，背景主体可以滚动的bug

* 支持body不滚动，状态复原

* 支持body不滚动，状态复原

mip-sidebar/README.md

@@ -53,7 +53,7 @@
       </li>
       <li> Nav item 5</li>
       <li> Nav item 6</li>
-      </ul>
+    </ul>
 </mip-sidebar>
 ```
 
@@ -101,6 +101,7 @@
       </li>
       <li> Nav item 5</li>
       <li> Nav item 6</li>
+    </ul>
 </mip-sidebar>
 ```
 

mip-sidebar/mip-sidebar.js

@@ -1,7 +1,7 @@
 /**
  * @file 侧边栏组件
  *
- * @author [email protected]
+ * @author [email protected], liangjiaying
  * @version 1.0
  * @copyright 2016 Baidu.com, Inc. All Rights Reserved
  */
@@ -29,11 +29,13 @@ define(function (require) {
             return;
         }
 
-        // pageScroll_.call(self);
-
         util.css(self.element, {display: 'block'});
         openMask.call(self);
 
+
+        self.bodyOverflow = getComputedStyle(document.body).overflow;
+        document.body.style.overflow = "hidden";
+
         // 动画效果
         var openTimer = setTimeout(function () {
 
@@ -60,6 +62,8 @@ define(function (require) {
 
         closeMask.call(self);
 
+        document.body.style.overflow = self.bodyOverflow;
+
         // 动画效果
         var closeTimer = setTimeout(function () {
 
@@ -96,11 +100,7 @@ define(function (require) {
         }
 
         self.maskElement.setAttribute('on', 'tap:' + self.id + '.close');
-        //侧边栏调出来后页面主体部分禁止滚动
-        self.maskElement.addEventListener('touchmove', function(e) {
-            e.preventDefault();
-            e.stopPropagation();
-        },false);
+
         // 样式设置
         util.css(self.maskElement, {display: 'block'});
 

mip-sidebar/package.json

@@ -1,11 +1,16 @@
 {
     "name": "mip-sidebar",
-    "version": "1.1.4",
-    "author": {
-        "name": "wangpei07",
-        "email": "[email protected]",
-        "url": "https://www.mipengine.org"
-    },
+    "version": "1.1.5",
+    "contributers": [
+        {
+            "name": "wangpei07",
+            "email": "[email protected]",
+            "url": "https://www.mipengine.org"
+        },{
+            "name": "Jenny_L",
+            "email": "[email protected]"
+        }
+    ],
     "engines": {
         "mip": ">=1.1.0"
     }