在 Element Plus 中实现开始日期小于结束日期的验证

html 复制代码
<template>
  <el-form :model="form" :rules="rules" ref="formRef" label-width="100px">
    <el-form-item label="开始日期" prop="startDate">
      <el-date-picker
        v-model="form.startDate"
        type="date"
        placeholder="选择开始日期"
        value-format="YYYY-MM-DD"
        :disabled-date="(date) => form.endDate && date > new Date(form.endDate)"
      />
    </el-form-item>
    
    <el-form-item label="结束日期" prop="endDate">
      <el-date-picker
        v-model="form.endDate"
        type="date"
        placeholder="选择结束日期"
        value-format="YYYY-MM-DD"
        :disabled-date="(date) => form.startDate && date < new Date(form.startDate)"
      />
    </el-form-item>
    
    <el-form-item>
      <el-button type="primary" @click="submitForm">提交</el-button>
      <el-button @click="resetForm">重置</el-button>
    </el-form-item>
  </el-form>
</template>

<script setup>
import { ref, reactive } from 'vue'
import { ElMessage } from 'element-plus'

const formRef = ref()
const form = reactive({
  startDate: '',
  endDate: ''
})

// 自定义验证规则
const validateStartDate = (rule, value, callback) => {
  if (!value) {
    callback(new Error('请选择开始日期'))
  } else if (form.endDate && new Date(value) > new Date(form.endDate)) {
    callback(new Error('开始日期不能晚于结束日期'))
  } else {
    callback()
  }
}

const validateEndDate = (rule, value, callback) => {
  if (!value) {
    callback(new Error('请选择结束日期'))
  } else if (form.startDate && new Date(value) < new Date(form.startDate)) {
    callback(new Error('结束日期不能早于开始日期'))
  } else {
    callback()
  }
}

const rules = {
  startDate: [
    { required: true, validator: validateStartDate, trigger: 'change' }
  ],
  endDate: [
    { required: true, validator: validateEndDate, trigger: 'change' }
  ]
}

const submitForm = async () => {
  if (!formRef.value) return
  
  try {
    await formRef.value.validate()
    ElMessage.success('验证通过！')
    console.log('表单数据：', form)
    // 提交逻辑
  } catch (error) {
    ElMessage.error('请检查表单填写是否正确')
  }
}

const resetForm = () => {
  if (!formRef.value) return
  formRef.value.resetFields()
}
</script>

<style scoped>
.el-date-picker {
  width: 100%;
}
</style>