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

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/[email protected]/dist/vue.min.js"></script>

<div id="app">
  <p>{{ message }}</p>
  <child v-bind="stuff"></child>
</div>