v-model 配合 computed对表单进行封装

父组件

<template>
  <SearchBar v-model="modelValue"/>
</template>
<script setup>
import SearchBar from "@/components/SearchBar.vue";
import { ref } from "vue";
const modelValue = ref({
  keyword: "",
  placeholder: "请输入你要查询的关键字",
  options: [
    { label: "视频", value: "video" },
    { label: "语音", value: "audio" },
    { label: "用户", value: "user" },
  ],
  selectValue: "audio",
});
</script>

子组件

<template>
  <el-input
    v-model="model.keyword"
    :placeholder="model.placeholder"
    class="input-with-select"
  >
    <template #prepend>
      <el-select
        v-model="model.selectValue"
        placeholder="Select"
        style="width: 115px"
      >
        <el-option
          v-for="item in model.options"
          :key="item.value"
          :label="item.label"
          :value="item.value"
        />
      </el-select>
    </template>
    <template #append>
      <el-button :icon="Search" />
    </template>
  </el-input>
</template>
<script setup>
import { Search } from "@element-plus/icons-vue";
import useVModel from '@/utils/useVModel';
const emit = defineEmits(['update:modelValue']);
const props = defineProps({
  modelValue: {
    type: Object,
    required: true,
  },
});
const model = useVModel(props,'modelValue',emit)
</script>

useVModel方法

import {computed } from 'vue';
const useVModel = (props, propsName, emit) => {
    return computed({
        get() {
            return new Proxy(props[propsName], {
                set(obj, name, val) {
                    emit('update:' + propsName, {
                        ...obj,
                        [name]: val
                    })
                    return true;
                }
            })
        }
    })
}
export default useVModel;