详解基于element的区间选择组件校验(交易金额)

<el-col :span="8" v-if="item.qttccType === 1"> 
 <el-col :span="14">
  <el-form-item :label="item.qttccName" :prop="'list.'+ index + '.startNum'" :rules="item.qttccName === '交易金额' ? startMoneyRule(tIndex) : []">
   <el-input v-model.number="item.qttcStartNum" style="width: 100%;" @change="handleMinChange(index)"></el-input>
  </el-form-item>
 </el-col>
 <el-col :span="10">
  <el-form-item label="~" label-width="10px" :prop="'list.'+ index + '.qttcEndNum'" :rules="item.qttccName === '交易金额' ? endMoneyRule(tIndex) : []">
   <el-input v-model.number="item.qttcEndNum" style="width: 60%;" @change="handleMaxChange(index)"></el-input>
  </el-form-item>
 </el-col>
</el-col>

validateCom(rule, value, callback) {
   const MIN_NUMBER = 1
   const one = Number(value)
   if (Number.isInteger(one)) {
    if (one < MIN_NUMBER) {
     return callback(new Error('输入值必须大于0'))
    } else if (one.length > 50) {
     callback(new Error('最大长度为50位'))
    }
    return callback()
   }
   return callback(new Error('请输入数字值'))
  }

startMoneyRule(index) {
   const validateMin = (rule, value, callback) => {
    const one = Number(value)
    const max = Number(this.form.list[index].qttcEndNum)
    if (!max || one < max) {
     return callback()
    }
    return callback(new Error('输入值不得大于最大阈值'))
   }
   const R = []
   R.push({ required: false, message: '请填写交易金额最小值', trigger: 'blur' },
    { validator: this.validateCom, trigger: 'blur' },
    { validator: validateMin, trigger: 'blur' })
   return R
  },
  endMoneyRule(index) {
   const validateMax = (rule, value, callback) => {
    const one = Number(value)
    const min = Number(this.form.list[index].qttcStartNum)
    if (!min || one > min) {
     return callback()
    }
    return callback(new Error('输入值不得小于最小阈值'))
   }
   const R = []
   R.push({ required: false, message: '请填写交易金额最大值', trigger: 'blur' },
    { validator: this.validateCom, trigger: 'blur' },
    { validator: validateMax, trigger: 'blur' })
   return R
  }

handleMinChange(index) {
   this.$refs.form.validateField('list.' + index + '.qttcEndNum')
  },
  handleMaxChange(index) {
   this.$refs.form.validateField('list.' + index + '.qttcStartNum')
  }