<div class="content">
	 <el-scrollbar style="width: 100%; height: 100%">
	    <ul>
	      <li v-for="(item, index) in arr" :key="index + 'pop'">
	        ...
	      </li>
	    </ul>
	  </el-scrollbar>
</div>

ul{
	height: 100%;
	max-height: 150px;
}