vue两个输入框联动校验方式(最大值-最小值)

<el-input v-model="restoreForm.maxrate" placeholder="请输入" style="margin-left:5px;width:140px" @blur="checknum('max')"></el-input>

<el-input v-model="restoreForm.restorerate" placeholder="请输入" style="margin-left:5px;width:140px" @blur="checknum('min')"></el-input>

//最小值
    const checkrestorerate = (rule, value, callback) => {
      const { maxrate, restorerate } = this.restoreForm;
 
      // let reg = /^([1-9]|[1-9]\d|1\d{2}|100)$/;
      let reg = /^([1-9][0-9]{0,1}|100)$/;
      if (!reg.test(restorerate)) {
        return callback(new Error("请输入1-100内整数"));
      } else {
        if (
          Number(maxrate) &&
          Number(restorerate) &&
          Number(restorerate) >= Number(maxrate)
        ) {
          return callback(new Error("最小值需小于最大值"));
        } else {
          return callback();
        }
      }
    };
    //最大值
    const checkmaxrate = (rule, value, callback) => {
      const { maxrate, restorerate } = this.restoreForm;
      let reg = /^([1-9][0-9]{0,1}|100)$/;
      if (!reg.test(maxrate)) {
        return callback(new Error("请输入1-100内整数"));
      } else {
        if (
          Number(maxrate) &&
          Number(restorerate) &&
          Number(restorerate) >= Number(maxrate)
        ) {
          return callback(new Error("最小值需小于最大值"));
        } else {
          return callback();
        }
      }
    };

 checknum(type) {
      if (type === "max") {
        if (this.restoreForm.maxrate > this.restoreForm.restorerate) {
          this.$refs.restoreForm.validateField("restorerate");
        }
      } else {
        if (this.restoreForm.maxrate > this.restoreForm.restorerate) {
          this.$refs.restoreForm.validateField("maxrate");
        }
       
      }
    },

<template>
  <div class="app-container">
    <el-form ref="ruleForm" :model="ruleForm" :rules="rules" label-width="100px" class="demo-ruleForm">
      <el-form-item label="范围" prop="area">
        <el-col :span="11">
          <el-form-item prop="start">
            <el-input v-model="ruleForm.start" placeholder="请输入起始值(0-1000)" />
          </el-form-item>
        </el-col>
        <el-col class="line" :span="2" style="text-align:center">-</el-col>
        <el-col :span="11">
          <el-form-item prop="end">
            <el-input v-model="ruleForm.end" placeholder="请输入结束值(0-1000)" />
          </el-form-item>
        </el-col>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" @click="submitForm('ruleForm')">提交</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
export default {
  data() {
    const validateStart = (rule, value, callback) => {
      if (!!value) {
        // 1-1000的正则
        const numReg = /^(?!00)(?:[0-9]{1,3}|1000)$/
        if (!numReg.test(value)) {
          this.ruleForm.areaRules[0] = 1
          // 手动触发最外层form-item的正则验证
          this.areaBlur()
          return callback()
        }
        if (numReg.test(value)) {
          this.ruleForm.areaRules[0] = 2
          this.areaBlur()
          return callback()
        }
        this.ruleForm.areaRules[0] = 0
        this.areaBlur()
        callback()
      } else {
        this.ruleForm.areaRules[0] = -1
        this.areaBlur()
        return callback()
      }
    }
    const validateEnd = (rule, value, callback) => {
      if (!!value) {
        // 1-1000的正则
        const numReg = /^(?!00)(?:[0-9]{1,3}|1000)$/
        if (!numReg.test(value)) {
          this.ruleForm.areaRules[1] = 1
          this.areaBlur()
          return callback()
        }
        if (numReg.test(value)) {
          this.ruleForm.areaRules[1] = 2
          this.areaBlur()
          return callback()
        }
        this.ruleForm.areaRules[1] = 0
        this.areaBlur()
        callback()
      } else {
        this.ruleForm.areaRules[1] = -1
        this.areaBlur()
        return callback()
      }
    }
    // areaRules内值的含义：-1 提醒不能为空 0则表示正常 其他值为格式错误
    const validateArea = (rule, value, callback) => {
      if (this.ruleForm.areaRules.includes(-1)) {
        return callback(new Error('范围不能为空'))
      }
      if (this.ruleForm.areaRules[0] !== this.ruleForm.areaRules[1] || this.ruleForm.areaRules[0] === 1 || this.ruleForm.areaRules[1] === 1) {
        return callback(new Error('格式错误'))
      }
      if (this.ruleForm.start > this.ruleForm.end) {
        return callback(new Error('起始序号不能大于截止序号'))
      }
      callback()
    }
    return {
      ruleForm: {
        start: '',
        end: '',
        areaRules: [-1, -1]
      },
      rules: {
        start: [{ type: 'string', required: true, validator: validateStart, trigger: 'blur' }],
        end: [{ type: 'string', required: true, validator: validateEnd, trigger: 'blur' }],
        area: [{ type: 'array', required: true, validator: validateArea, trigger: 'change' }]
      }
    }
  },
  methods: {
    submitForm(formName) {
      this.$refs[formName].validate((valid) => {
        if (valid) {
          alert('submit!')
        } else {
          console.log('error submit!!')
          return false
        }
      })
    },
    // 手动触发最外层form-item的正则验证
    areaBlur() {
      this.$refs['ruleForm'].validateField('area')
    }
  }
}
</script>