Vuejs 3 props are Proxy - vue.js

Question

I am passing array as a prop to another component, and when I want to read this on mounted in that component, I got Proxy {}. How to read data from this prop? You can see in example when I want to console log prop, result is Proxy {}. I can see all values in HTML structure, but not in the console on mounted.
<template>
<div class="custom-select-container">
<div class="selected-item" #click="openSelect">
<span class="selected-items-text">{{ selectedItem.name }}</span>
<span class="icon-arrow1_b selected-items-icon" :class="{ active: showOptions }" />
</div>
<transition name="fade">
<ul v-show="options.length && showOptions" class="custom-select-options">
<li v-for="(option, index) in options" :key="index" class="custom-select-item">{{ option.name }}</li>
</ul>
</transition>
</div>
</template>
<script>
import { ref, onMounted } from 'vue'
export default {
props: {
options: {
type: Array,
default: () => []
}
},
setup(props) {
let showOptions = ref(false);
let selectedItem = ref(props.options[0])
const openSelect = () => {
showOptions.value = !showOptions.value
}
onMounted(() => {
console.log('test', props.options)
})
return {
openSelect,
showOptions,
selectedItem
}
}
}
</script>
Parent component where I am passing data:
<template>
<div class="page-container">
<div>
<div class="items-title">
<h3>List of categories</h3>
<span>({{ allCategories.length }})</span>
</div>
<div class="items-container">
<div class="item" v-for="(category, index) in allCategories" :key="index">
<span class="item-cell size-xs">{{ index + 1 }}.</span>
<span class="item-cell size-l">{{ category.name }}</span>
</div>
</div>
</div>
<custom-select
:options="allCategories"
/>
</div>
</template>
<script>
import CustomSelect from '../components/Input/CustomSelect'
import { computed } from 'vue'
import { useStore } from 'vuex'
export default {
components: {
CustomSelect
},
computed: {
},
setup() {
const store = useStore()
const allCategories = computed(() => store.getters['categories/getAllCategories'])
return {
allCategories
}
}
}
</script>

Answer 1

That's how reactivity works in Vue3.
use
console.log(JSON.parse(JSON.stringify(data))
or
console.log(JSON.stringify(data, null, 2))
to show the content of proxies in console