<el-date-picker
                  v-model="formData.startTimeEndTime"
                  type="datetimerange"
                  range-separator="至"
                  value-format="yyyy-MM-dd HH:mm"
                  start-placeholder="开始日期"
                  end-placeholder="结束日期"
                  @change="startTimeEndTimeChnage"
                  @input="callbackTimer"
                ></el-date-picker>

 callbackTimer() {
    
    
      this.$forceUpdate()//强制刷新
    },