Vue3+Element+Ts实现表单的基础搜索重置等功能

从Vue2的写法转变为Vue3的格式之后，会有一些写法和代码结构的改变，这里对一些重点进行介绍。

代码结构：

写法一(推荐)：

<script setup lang=\"ts\">
import { ref, reactive } from \'vue\'
import type { ElForm } from \'element-plus\'
const myform = ref<InstanceType<typeof ElForm>>()
const formData = reactive({
  name: \'\',
  subject: \'\',
  grade: \'\'
})
// 查找
const submitForm = () => {
  const { name, subject, grade } = formData
  console.log(name, subject, grade)
}
// 重置
const submitReset = () => {
  myform.value?.resetFields()
}
</script>

<template>
  <div class=\"mysearch\">
    <el-form :model=\"formData\" label-width=\"80px\" ref=\"myform\">
      <el-row :gutter=\"24\">
        <el-col :span=\"8\">
          <el-form-item label=\"名称\" prop=\"name\">
            <el-input v-model=\"formData.name\"></el-input>
          </el-form-item>
        </el-col>
        <el-col :span=\"8\">
          <el-form-item label=\"学科\" prop=\"subject\">
            <el-input v-model=\"formData.subject\"></el-input>
          </el-form-item>
        </el-col>
        <el-col :span=\"8\">
          <el-form-item label=\"年级\" prop=\"grade\">
            <el-select v-model=\"formData.grade\" placeholder=\"请选择\">
              <el-option label=\"一年级\" value=\"shanghai\"></el-option>
              <el-option label=\"二年级\" value=\"beijing\"></el-option>
            </el-select>
          </el-form-item>
        </el-col>
      </el-row>
      <el-row :gutter=\"20\">
        <el-col :span=\"2\" :offset=\"19\">
          <el-button type=\"primary\" size=\"medium\" @click=\"submitForm\">
            查 询
          </el-button>
        </el-col>
        <el-col :span=\"2\" :offset=\"0\">
          <el-button type=\"primary\" size=\"medium\" @click=\"submitReset\">
            重 置
          </el-button>
        </el-col>
      </el-row>
    </el-form>
  </div>
</template>

<style scoped lang=\"less\">
.mysearch {
  padding: 20px;
}
</style>

写法二：

<template>
  <div class=\"mysearch\">
    <el-form ref=\"myform\" :model=\"formData\" label-width=\"80px\">
      <el-row :gutter=\"24\">
        <el-col :span=\"8\">
          <el-form-item label=\"名称\" prop=\"name\">
            <el-input v-model=\"formData.name\"></el-input>
          </el-form-item>
        </el-col>
        <el-col :span=\"8\">
          <el-form-item label=\"学科\" prop=\"subject\">
            <el-input v-model=\"formData.subject\"></el-input>
          </el-form-item>
        </el-col>
        <el-col :span=\"8\">
          <el-form-item label=\"年级\" prop=\"grade\">
            <el-select v-model=\"formData.grade\" placeholder=\"请选择\">
              <el-option label=\"一年级\" value=\"shanghai\"></el-option>
              <el-option label=\"二年级\" value=\"beijing\"></el-option>
            </el-select>
          </el-form-item>
        </el-col>
      </el-row>
      <el-row :gutter=\"20\">
        <el-col :span=\"2\" :offset=\"19\">
          <el-button type=\"primary\" size=\"medium\" @click=\"submitForm\"
            >查 询</el-button
          >
        </el-col>
        <el-col :span=\"2\" :offset=\"0\">
          <el-button type=\"primary\" size=\"medium\" @click=\"submitReset\"
            >重 置</el-button
          >
        </el-col>
      </el-row>
    </el-form>
  </div>
</template>
<script lang=\"ts\">
import { defineComponent, reactive, ref } from \'vue\'
import { ElForm } from \'element-plus\'

export default defineComponent({
  setup() {
    const formData = reactive({
      name: \'\',
      subject: \'\',
      grade: \'\'
    })
    const myform = ref<InstanceType<typeof ElForm>>()
    // 查找
    const submitForm = () => {
      const { name, subject, grade } = formData
      console.log(name, subject, grade)
    }
    // 重置
    const submitReset = () => {
      myform.value?.resetFields()
    }
    return {
      formData,
      myform,
      submitForm,
      submitReset
    }
  }
})
</script>

<style scoped lang=\"less\">
.mysearch {
  padding: 20px;
}
</style>

区别：

• 写法一由上到下，分别是JS、HTML、Css，类似于React的写法，逻辑也清晰
• 写法一由上到下，分别是HTML、JS、Css，和之前的Vue2写法类似
• 写法一的格式不需要将data,methods等内容进行导出，节省了代码量

重点：

1、Element Plus的官网Demo的代码里面没有写prop

  <el-form-item label=\"Activity name\">
      <el-input v-model=\"form.name\"></el-input>
    </el-form-item>

为了实现数据的响应式，在写的时候需要自己绑定
2、使用el-form的ref需要引入ElForm

import { ElForm } from \'element-plus\'
const myform = ref<InstanceType<typeof ElForm>>()