elementui tooltip 设置宽度
<el-tooltip v-if="item.stateEnum === 6" placement="bottom">
<template slot="content">
<p style="max-width: 500px">{{ item.approDesp }}</p>
</template>
<div v-if="item.stateEnum === 6">审批意见:{{ item.approDesp || '' }}</div>
</el-tooltip>