先在main.js中导入

import moment from 'moment'

<el-row>
  <el-col :span="12">
    <el-form-item label="考试开始时间" prop="startTime">
      <el-date-picker v-model="shiJuanXinXiForm.startTime" style="width: 100%" type="datetime"
                      start-placeholder="开始时间" value-format="yyyy-MM-dd HH:mm:ss"
                      format="yyyy-MM-dd HH:mm:ss" @change="changeStartEnd('start', $event)"></el-date-picker>
    </el-form-item>
  </el-col>
  <el-col :span="12">
    <el-form-item label="考试结束时间" prop="endTime">
      <el-date-picker v-model="shiJuanXinXiForm.endTime" value-format="yyyy-MM-dd HH:mm:ss" format="yyyy-MM-dd HH:mm:ss"
                      style="width: 100%"
                      type="datetime" start-placeholder="结束时间"
                      :picker-options="pickerOptions" @change="changeStartEnd('end', $event)"></el-date-picker>
    </el-form-item>
  </el-col>
</el-row>

  methods: {
      changeStartEnd(type, val) {
          debugger
    if (type === "start") {
        this.shiJuanXinXiForm.endTime = val
    }
},

}

computed: {
  isVisible: {
    get() {
      return this.dialogVisible;
    },
    set() {
      this.close();
      this.reset();
    },
  },
  title() {
    return this.$t("common." + this.type);
  },
    pickerOptions() {
        let str = "";
        if(this.$moment(this.shiJuanXinXiForm.startTime).format("YYYY-MM-DD") === this.$moment(this.shiJuanXinXiForm.endTime).format("YYYY-MM-DD")){
            str = this.shiJuanXinXiForm.startTime.split(" ").at(-1)
        }else{
            str = "00:00:00"
        }
        return {
            disabledDate: (time) => {
                return new Date(this.shiJuanXinXiForm.startTime).getTime() > time.getTime();
            },
            selectableRange: str + " - 23:59:59"
        }
    },
},