iview implements dynamic form and custom verification time period overlap

<template lang="html">
 <div class="">

    <Form
      ref="formValidate"
      :model="formValidate"
      :rules="rulesValidate"
      :label-width="100"
      :label-colon="true"
    >
   <FormItem
    v-for="(item, index) in formValidate.showTimeDurations"
    :key="index"
    :prop="'showTimeDurations[' + index + '].value'"
    :label="'Show time period' + (index + 1)"
   >
    <Row>
     <TimePicker
      type="timerange"
      v-model="item.value"
      placement="bottom-end"
      placeholder="Select a time period"
      style="width: 400px;"
      :disabled="isDisEdit"
      ></TimePicker>
     <Button shape="circle" icon="md-close" @click="handleRemove(index)" style="margin-left: 10px;"></Button>
    </Row>
   </FormItem>
   <FormItem style="width: 500px;" v-if="formValidate.showTimeDurations.length < 3">
    <Button type="dashed" long @click="handleAddDuration" icon="md-add">Add display period</Button>
   </FormItem>
   </Form>
 </div>
</template>

<script>
export default {
 name: 'banner_new',
 data() {
  return {
   formValidate: {
    showTimeDurations: [{value: ['','']}]
   }
  }
 },
 methods: {
  handleAddDuration() {
   this.formValidate.showTimeDurations.push({value: ['','']})
  },
  handleRemove(index) {
   this.formValidate.showTimeDurations.splice(index, 1)
  }
 }
}
</script>

<style lang="css" scoped>
</style> 

 <FormItem label="Name" prop="title" style="width: 500px;">
    <Input v-model="formValidate.title" :disabled="isDisEdit" :placeholder="'Please enter the name of the slideshow (up to 50 characters)'" maxlength="50" show-word-limit></Input>
  </FormItem>
  ...
  <Row type="flex" justify="start" style="margin-top: 20px;">
    <Button type="primary" style="width: 100px; margin-left: 20px;" v-if="isCanSave" @click="handleSubmit('formValidate')">Save</Button>
  </Row>

  methods: {
    handleSubmit(form) {
      // Calling the validate method will perform validation this.$refs[form].validate(validate => {
        // validate=true/false, whether the verification is successful or not})
    },
  }

rulesValidate: {
  title:
    {
      required: true,
      message: 'Please fill in the name of the slideshow',
      trigger: 'blur'
    },
    {
      type: 'string',
      max: 50,
      message: 'Within 50 characters, Chinese/letters/numbers/common characters',
      trigger: 'change'
    }
  ],

title: [{{ required: true, message: 'Please fill in the image name', trigger: 'blur'}}]

data() {
  const durationValitator = (rule, value, callback) => {
    if(this.isShowTimePicker && value.toString() === ',') {
      callback(new Error('Please select the display time period'));
    }else if(value[0] === value[1]) {
      callback(new Error('Please select the correct time period'))
    }else if(!showTimeDurationsJudge(this.formValidate.showTimeVOS)){
      callback(new Error('Time period cannot be repeated'))
    }else {
      callback()
    }
  };
  const durationValidate = [{ validator: durationValitator, trigger: 'blur' }];
  return {
    rulesValidate: {
      'showTimeDurations[0].value': durationValidate,
      'showTimeDurations[1].value': durationValidate,
      'showTimeDurations[2].value': durationValidate,
    }
  }
}

const judge = (a1,a2) => {
 let result = false
  const start1 = moment(a1[0],"HH:mm:ss").valueOf()
  const end1 = moment(a1[1],"HH:mm:ss").valueOf()
  const start2 = moment(a2[0],"HH:mm:ss").valueOf()
  const end2 = moment(a2[1],"HH:mm:ss").valueOf()

  if(start1 == start2) {
    return false
  }else if(start1 > start2) {
    result = start1 > end2
  }else {
    result = end1 < start2
  }
  return result
}

import moment from 'moment'

export const showTimeDurationsJudge = (durations) => {
 let judgeResult = true
 if (durations && durations.length > 1) {
  for(let i=0;i<durations.length-1;i++){
   for(let j=i+1;j < durations.length; j++) {
       judgeResult = judgeResult && judge(durations[i].value,durations[j].value)
     }
  }
 }
 return judgeResult
}

const judge = (a1,a2) => {
 let result = false
  const start1 = moment(a1[0],"HH:mm:ss").valueOf()
  const end1 = moment(a1[1],"HH:mm:ss").valueOf()
  const start2 = moment(a2[0],"HH:mm:ss").valueOf()
  const end2 = moment(a2[1],"HH:mm:ss").valueOf()

  if(start1 == start2) {
    return false
  }else if(start1 > start2) {
    result = start1 > end2
  }else {
    result = end1 < start2
  }
  return result
}