Refs and Ref Details in Vue3

This site also shares questions about the data in Vue3. Let's give an example of this

Vue.createApp({
    template: `<div>{{ nameObj.name }}</div>`,
    setup() {
        const { reactive } = Vue
        const nameObj = reactive({name:'lilei',age:18})
        
        setTimeout(() => {
            nameObj.name = 'hanmeimei'
        },2000)
        return {
            nameObj
        }
    }
}).mount('#root')

At this time, we may think of it es6 About deconstruction assignment, can we put the above example nameObj Obtain internal by deconstructing the results name And then directly set the name What about returning? That is, the code is written like this

Vue.createApp({
    template: `<div>{{ name }}</div>`,
    setup() {
        const { reactive,toRefs } = Vue
        const nameObj = reactive({name:'lilei',age:18})
                let { name } = nameObj
        setTimeout(() => {
            name.value = 'hanmeimei'
        },2000)
        return {
            name
        }
    }
}).mount('#root')

In actual operation, we found that the content on the page did not become hanmeimei At this time, we need to introduce Vue3 Another content in, we should modify the code so that we can realize the responsiveness of data and pages

Vue.createApp({
    template: `<div>{{ name }}</div>`,
    setup() {
        const { reactive,toRefs } = Vue
        const nameObj = reactive({name:'lilei',age:18})
        let { name } = toRefs(nameObj)
        setTimeout(() => {
            name.value = 'hanmeimei'
        },2000)
        return {
            name
        }
    }
}).mount('#root')

Similarly, and toRefs It is very similar to that toRef The code example looks like this

Vue.createApp({
    template: `<div>{{ age }}</div>`,
    setup() {
        const { reactive,toRef } = Vue
        const nameObj = reactive({name:'lilei'})
        let age = toRef(nameObj,'age')
        setTimeout(() => {
            age.value = 'hanmeimei'
        },2000)
        return {
            age
        }
    }
}).mount('#root')