<el-date-picker
  v-model="filters.dateValue"
  type="daterange"
  value-format="yyyy-MM-dd"
  :default-time="['00:00:00', '23:59:59']"
  range-separator="至"
  start-placeholder="开始日期"
  end-placeholder="结束日期"
></el-date-picker>

filters: {
  dateValue: ["", ""],
  dateValue: ["", ""],
},

//因为选择时间，然后删除时间后再次搜索，会直接报错。后发现容错如下：

beginDate:
  this.filters.dateValue != null
    ? this.filters.dateValue[0]
    : this.filters.dateValue,
endDate:
  this.filters.dateValue != null
    ? this.filters.dateValue[1]
    : this.filters.dateValue,