By webfansplz @webfansplz
For this challenge, you'll use Reactivity API: ref to solve the problem at hand.
Here's what you need to implement 👇:
<script setup lang="ts">
import { ref, Ref, reactive } from "vue"
const initial = ref(10)
const count = ref(0)
// Challenge 1: Update ref
function update(value) {
// impl...
}
/**
* Challenge 2: Checks if `count` is a ref object.
* Make the output to be 1
*/
console.log(
// impl ? 1 : 0
)
/**
* Challenge 3: Unwrap ref
* Make the output to be true
*/
function initialCount(value: number | Ref<number>) {
// Make the output to be true
console.log(value === 10)
}
initialCount(initial)
/**
* Challenge 4:
* create a ref for a property on a source reactive object.
* The created ref is synced with its source property:
* mutating the source property will update the ref, and vice-versa.
* Make the output to be true
*/
const state = reactive({
foo: 1,
bar: 2,
})
const fooRef = ref() // change the impl...
// mutating the ref updates the original
fooRef.value++
console.log(state.foo === 2)
// mutating the original also updates the ref
state.foo++
console.log(fooRef.value === 3)
</script>
<template>
<div>
<h1>msg</h1>
<p>
<span @click="update(count-1)">-</span>
{{ count }}
<span @click="update(count+1)">+</span>
</p>
</div>
</template>
