update Drawer

src/styles/components/drawer.less

@@ -1,5 +1,84 @@
 @drawer-prefix-cls: ~"@{css-prefix}drawer";
 
 .@{drawer-prefix-cls} {
+    width: auto;
+    height: 100%;
+    position: fixed;
+    top: 0;
 
+    &-left{
+        left: 0;
+    }
+    &-right{
+        right: 0;
+    }
+
+    &-hidden {
+        display: none !important;
+    }
+
+    &-wrap {
+        position: fixed;
+        overflow: auto;
+        top: 0;
+        right: 0;
+        bottom: 0;
+        left: 0;
+        z-index: @zindex-drawer;
+        -webkit-overflow-scrolling: touch;
+        outline: 0;
+    }
+
+    &-wrap * {
+        box-sizing: border-box;
+        -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
+    }
+
+    &-mask {
+        .mask;
+    }
+
+    &-content {
+        width: 100%;
+        height: 100%;
+        position: absolute;
+        top: 0;
+        bottom: 0;
+        background-color: #fff;
+        border: 0;
+        background-clip: padding-box;
+        box-shadow: 0 4px 12px rgba(0,0,0,.15);
+
+        &-no-mask{
+            pointer-events: auto;
+        }
+    }
+
+    &-header {
+        .content-header;
+    }
+
+    &-close {
+        z-index: 1;
+        .content-close(1px, 31px);
+    }
+
+    &-body {
+        width: 100%;
+        height: calc(~'100% - 51px');
+        padding: 16px;
+        font-size: 12px;
+        line-height: 1.5;
+        word-wrap: break-word;
+        position: absolute;
+        overflow: auto;
+    }
+
+    &-no-header &-body{
+        height: 100%;
+    }
+
+    &-no-mask{
+        pointer-events: none;
+    }
 }

src/styles/custom.less

@@ -166,6 +166,7 @@
 @zindex-back-top        : 10;
 @zindex-select          : 900;
 @zindex-modal           : 1000;
+@zindex-drawer          : 1000;
 @zindex-message         : 1010;
 @zindex-notification    : 1010;
 @zindex-tooltip         : 1060;