解决uniapp编译的微信小程序不支持v-bind=“$attrs“

1. 环境

1. uniapp
2. vite + vue3 + TypeScript + vite（移动端低代码）
3. 编译成多端通用的小程序

2. 需要分两类解决

1. v-model属性

• 在高版本的vue3+vite中使用父组件传递下来的props中的某一个属性，作为当前组件的子组件的v-model入参，那么将会报错
• [vite] [plugin:vite:vue] v-model cannot be used on a prop, because local prop bindings are not writable. 09:49:27.156 Use a v-bind binding combined with a v-on listener that emits update:x event instead.

• 正确姿势

  1. 定义一个可读可写的computed

  	const value = computed({
        
        
  	  get: () => props.modelValue,
  	  set: (val) => {
        
        
  	    emits('update:modelValue', val)
  	  }
  	})
  

  2. 将computed直接拿去双向绑定

  	<template>
  	    <uni-easyinput v-model="value"></uni-easyinput>
  	</template>
  

  3. 完整代码

  	// 父组件
  	 <GdFormComponents v-model="formData[val.props.gdSearchItemProp]" />
  	// 子组件 GdFormComponents 
  	<template>
  	    <uni-easyinput v-model="value"></uni-easyinput>
  	</template>
  	
  	<script setup lang='ts'>
  	import  {
        
          type PropType, computed } from 'vue'
  	
  	const props = defineProps({
        
        
  	    modelValue: String as PropType<any>
  	})
  	
  	const  emits = defineEmits(['update:modelValue']);
  	
  	const value = computed({
        
        
  	  get: () => props.modelValue,
  	  set: (val) => {
        
        
  	    emits('update:modelValue', val)
  	  }
  	})
  	
  	</script>
  	
  	<style lang="scss" scoped>
  	
  	</style>
  

2.其他属性

• 虽然小程序不知持$attrs属性，但是我们还是可以用v-bind

解决方法

1. 父组件主动传递其他属性attrs

// 父组件
<GdFormComponents 
  v-model="formData[val.props.gdSearchItemProp]" 
  :componentName="val.props.gdChildren[0].componentName" 
  :attrs="val.props.gdChildren[0].props"
/>

2. v-bind=“attrs”

<template>
    <uni-easyinput v-model="value" v-bind="attrs"></uni-easyinput>
</template>

<script setup lang='ts'>
import  {
    
      type PropType, computed } from 'vue'

const props = defineProps({
    
    
    modelValue: String as PropType<any>,
    componentName: String,
    attrs: {
    
    
        type: Object as PropType<AnyObject>,
        default: () => ({
    
    })
    }
})

const  emits = defineEmits(['update:modelValue']);

const value = computed({
    
    
  get: () => props.modelValue,
  set: (val) => {
    
    
    emits('update:modelValue', val)
  }
})

</script>

<style lang="scss" scoped>

</style>

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