Vue3 useVModel 封装

//useVModel.js
import { computed, getCurrentInstance } from 'vue';

export const useVModel = (props, propName) => {
  const vm = getCurrentInstance().proxy;

  return computed({
    get() {
      return props[propName];
    },
    set(value) {
      vm.$emit(`update:${propName}`, value);
    },
  });
};

使用

<template>
  <form @submit.prevent="$emit('submit')">
    <div :class="$style.formBlock">
      <label :class="$style.label">Name</label>
      <input
        v-model="nameState"
        :class="$style.input"
        type="text"
        aria-label="Name input"
      />
    </div>
    <div :class="$style.formBlock">
      <label :class="$style.label">Surname</label>
      <input
        v-model="surnameState"
        :class="$style.input"
        type="text"
        aria-label="Surname input"
      />
    </div>
    <div>
      <button
        class="float-right bg-blue-100 text-blue-900 px-4 py-3 rounded font-semibold"
        type="submit"
      >
        Submit
      </button>
    </div>
  </form>
</template>

<script>
import { useVModel } from '../composables/useVModel.js';
export default {
  emits: ['update:name', 'update:surname', 'submit'],
  props: {
    name: String,
    surname: String,
  },
  setup(props) {
    return {
      nameState: useVModel(props, 'name'),
      surnameState: useVModel(props, 'surname'),
    };
  },
};
</script>

<style module>
.formBlock {
  @apply flex flex-col mb-4;
}
.label {
  @apply mb-2;
}
.input {
  @apply px-4 py-3 shadow rounded border border-gray-300 bg-white;
}
</style>