Q：Invalid default value for prop "value": Props with type Object/Array must use a factory function to return the default value.

A:

 list:{
            type: [Object,Array],
            default: ()=>{}
        },
        arr:{
            type: Array,
            default: ()=>[]
        },
        obj:{
            type: Object,
            default: ()=>{}
        }

Q: You are binding v-model directly to a v-for iteration alias. This will not be able to modify the v-for source array because writing to the alias is like modifying a function local variable. Consider using an array of objects and use v-model on an object property instead.
A:

<div v-for="(item,i) in list">
    <xx v-model="item"/>  错误
    <xx v-model="list[i]"/>  正确
</div>