el-input实现尾部加字

<el-input v-model="item.num"
class="th_inp"
size="mini"
placeholder="请填写的数量">
<span slot="suffix">元</span>
</el-input>


<el-input v-model="item.num"
class="th_inp"
size="mini"
placeholder="请填写的数量">
<span slot="suffix">元</span>
</el-input>
