<el-form-item label="状态:">
            <el-select v-model="MissionTemplateForm.state">
              <el-option
                v-for="state in StatusOptions"
                :key="state.key"
                :value="state.key"
                :label="state.display_name"
              />
            </el-select>
          </el-form-item>

定义可选择的下拉框内容

const StatusOptions = [
  { key: '0', display_name: '启用' },
  { key: '1', display_name: '禁用' }
]

在页面初始化时自动选中index为0的默认值

created() {
    this.MissionTemplateForm.state = this.StatusOptions[0].key
  },

本文转载于：https://www.jianshu.com/p/fc585349f843

方法二

<template>
  <div>
    <el-select v-model="query">
      <el-option v-for="item in options" :key="item.value" :value="item.value" :label="item.label"></el-option>
    </el-select>
  </div>
</template>
<script>
export default{
  data() {
    return {
      options: [{
        value: '01',
        label: '我的'
      }, {
        value: '02',
        label: '你的'
      }, {
        value: '03',
        label: '他的'
      }],
      query: '02'
    }
  }
}
</script>
<style></style>