vue3.3.x setup 新实验性特性 defineModel 定义多个属性

由于有些业务组件需要定义多个响应式props,类似这种(比较懒,没上ts),在vue3.3.x以前,如果不用三方库,代码会变得很繁琐

<script setup>
	const props = defineProps({
		modelValue: {
			type: Object,
			default: () => ({})
		},
		fields: {
			type: Object,
			default: () => ({})
		},
		list: {
			type: Array,
			default: () => []
		},
		loading: Boolean
	})

	const emit = defineEmits('update:modelValue', 'update:fields', 'update:list', 'update:loading')

	const onUpdateModelValue = (value) => {
		emit('update:modelValue', value)
	}

	const onUpdateLoading = (value) => {
		emit('update:loading', value)
	}

	// ...
</script>

正好vue3.3.x更新了新apiuseModel(原本使用的vueuse的useVModel),于是做出如下调整

<script setup>
	import { useModel } from 'vue'
	const props = defineProps({
		modelValue: {
			type: Object,
			default: () => ({})
		},
		fields: {
			type: Object,
			default: () => ({})
		},
		list: {
			type: Array,
			default: () => []
		},
		loading: Boolean
	})

	const emit = defineEmits('update:modelValue', 'update:fields', 'update:list', 'update:loading')

	const modelValue = useModel(props, 'modelValue')
	const fields = useModel(props, 'fields')
	const list = useModel(props, 'list')
	const loading = useModel(props, 'loading')
</script>

虽然用了vue3.3.x的新特性useModel,但是还是需要定义emit,所以代码还是觉得有点多,然后想到了跟useModel一起发布的defineModel,但是百度了一圈,都只有ts版本的defineModel,而且大部分是单个响应式props,多个属性的响应式配置完全摸不着头脑,于是只能去找找源码,还好源码注释很详细,被我找到了解决方案,具体实现如下

<script setup>
	import { defineModel } from 'vue' // 好像可以引入

	const modelValue = defineModel({ type: Object, default: () => ({}) })
	const fields = defineModel('fields', { type: Object, default: () => ({}) })
	const list = defineModel('list', { type: Array, default: () => [] })
	const loading = defineModel('loading', { type: Boolean })
</script>
posted @ 2023-09-15 17:32  豌里个豆  阅读(2489)  评论(0编辑  收藏  举报