element 日期选择器 禁止选择过去日期

<el-date-picker
    v-model="ruleForm.dateArr"
    type="datetimerange"
    range-separator="至"
    start-placeholder="开始日期"
    end-placeholder="结束日期"
    value-format="yyyy-MM-dd HH:mm:ss"
    :picker-options="pickerOptions"
></el-date-picker>


data () {
  return {
    pickerOptions: {
        disabledDate(time) {
          return time.getTime() < Date.now() - 8.64e7;
        }
    },
  }
}