请问如何显示el-checkbox-group按钮组的左边框？

Question

<template>
    <el-checkbox-group v-model="checkboxGroup1" size="small" >
      <el-checkbox-button v-for="city in cities" :label="city" :key="city">{{city}}</el-checkbox-button>

    </el-checkbox-group>
</template>

Answer 1

他把左边框去掉了，你给他补上不就行了