Element：改变原生 el-dropdown 的样式
<el-dropdown-menu slot="dropdown" :style="styleObject" v-if="length > 0" class="newDrop">
<template>
<el-dropdown-item>
<el-button
type="text"
icon="el-icon-delete"
size="mini"
style="color: red"
@click="allRead"
>
全部已读</el-button
>
</el-dropdown-item>
</template>
<template v-if="unReadInnerMsgList">
<el-dropdown-item
v-for="(item, index) in unReadInnerMsgList"
:key="index"
>
<router-link
v-if=" == 1"
to="/info/history"
style="margin-left: 0"
@click.native="updateNoticeState(, )"
>
<div>
<svg-icon icon-class="fire-fight"></svg-icon>
<span style="font-size: 12px">
{{ item.time }}
</span>
</div>
<div style="font-size: 12px; padding-top: 0; margin-top: -10px">
{{ item.content }}
</div>
</router-link>
</el-dropdown-item>
</template>
</el-dropdown-menu>
<el-dropdown-menu class="newDrop" v-else>
<el-dropdown-item>
<div>暂无未读消息</div>
</el-dropdown-item>
</el-dropdown-menu>