no message

Former-commit-id: 85ec7bbd986a27b5bf63f4c661bd992e0ee96cf7
Former-commit-id: c82d46c4a506965beb80b7c8dbea4e1650c91723
Former-commit-id: b7578889722e86782b775d382f87c5eb00ebd0b6

src/pages/demo/plugins/clipboard-polyfill/demo.vue

@@ -7,7 +7,7 @@
     </PageHeader>
     <el-row :gutter="10">
       <el-col :span="12">
-        <div class="mb">
+        <div class="dd-mb">
           <el-input v-model="text" style="width: 200px;"></el-input>
           <el-button @click="copyText()">将左侧输入框内的文字复制进剪贴板</el-button>
         </div>
@@ -15,12 +15,12 @@
       </el-col>
       <el-col :span="12">
         <el-alert
-          class="mb"
+          class="dd-mb"
           title="只有在 IE 浏览器下你才可以通过下面这两个按钮获取剪贴板数据"
           type="warning"
           show-icon>
         </el-alert>
-        <div class="mb">
+        <div class="dd-mb">
           <el-tooltip content="需要 IE 浏览器" placement="top">
             <el-button @click="readText">readText( )</el-button>
           </el-tooltip>