JSFiddle - React, Tailwind, and code Playground

HTML

<script src="//unpkg.com/vue/dist/vue.js"></script>
<script src="//unpkg.com/element-ui/lib/index.js"></script>
<div id="app">
  <el-row>
    <el-col span="12">
      <el-select v-model="value" placeholder="请选择" multiple style="width:100%">
        <el-option
          v-for="item in options"
          :key="item.value"
          :label="item.label"
          :value="item.value">
        </el-option>
      </el-select>
    </el-col>
  </el-row>
</div>

CSS

@import url("//unpkg.com/element-ui/lib/theme-chalk/index.css");

.el-select-dropdown {
  max-width: 2px;
}

.el-select__tags .el-select__tags-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 150px;
  display: inline-block;
  vertical-align: middle;
}

JavaScript

var Main = {
data() {
      return {
        options: [{
          value: '选项1',
          label: '黄金糕'
        }, {
          value: '选项2',
          label: '双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶双皮奶'
        }],
        value: '选项2'
      }
      }
}
var Ctor = Vue.extend(Main)
new Ctor().$mount('#app')