How to get props in child component using v-bind object - vue.js

Question

I want to pass all the properties in an object as props, and use v-bind without an argument.
But how can I get the props in the child without having to declare the props in the child component?
For example, in the code below item is an object.
Parent component:
<div v-for="item in domArr" :key="item.id">
<cus-dom v-bind="item"></cus-dom>
</div>
Child component:
<script>
export default {
name: 'cusDom',
props: [], // HOW TO GET THE props, because I have it empty/no arguments HERE?
data() {
return {};
},
mounted() {
}
}
</script>

Answer 1

Even when using v-bind, you still have to declare them as props.
If you don't they will be $attrs.
See demo below, should make it clear.
Vue.component('child', {
props: ['a'],
template: `<button #click="go">PROPS AND ATTRS</button>`,
mounted() {
this.go()
},
methods: {
go() {
console.log(
'$attrs:', JSON.stringify(this.$attrs), '- $props:', JSON.stringify(this.$props),
'- a:', this.a, '- b:', this.b)
}
}
});
new Vue({
el: '#app',
data: {
message: 'Hello Vue.js!',
stuff: {a: 1, b: 2}
}
})
<script src="https://unpkg.com/vue#2.5.16/dist/vue.min.js"></script>
<div id="app">
<p>{{ message }}</p>
<child v-bind="stuff"></child>
</div>