vue3常用响应式对象的api,你全用过了吗

import {ref，reactive} from 'Vue';
setup() {
    const num =  ref(123);
    num.value = 456;
     
    const obj = reactive({num:123});
    obj.value = 456;
}

import {isRef，isReactive} from 'vue';
setup() {
	const num = ref(123)
    console.log(isRef(num))  // => true
}

import { toRef , reactive } from 'vue';
setup() {
	const obj = reactive({ width:10, height:20 })
    const width = toRef(obj,'width')
	
	return {
		width
	}
}

import { toRefs , reactive } from 'vue';
setup() {
	const obj = reactive({ width:10, height:20 })
    const { width, height }= toRefs(obj)
	
	return {
		width, height
	}
}

import { toRefs , reactive } from 'vue';
setup() {
	const obj = reactive({ width:10, height:20 })
	
	return {
		...toRefs(obj)
	}
}

import {toRaw} from 'vue';
setup(){
    const num1 =  ref(123)
    const num2 = toRaw(num1)
    console.log(num2 === 123)  //=>true
}

import { markRaw, reactive } from "vue";
setup(){
	const obj = reactive({ num:1 }); //让数据无法被追踪
	      obj.noUpdate = markRaw({num:1});

	function add() {
  		obj.num++;      // 页面数据 会更新
  	
  		obj.noUpdate.num++; //页面数据 不会更新
	}
	return { obj , add }
}

const aaa = ref('abc');
const bbb = unref(aaa); 

import {shallowRef，shallowReactive} from 'vue';
setup(){
	const  obj1 = shallowRef({a:1,b:{c:2})
	const  obj2 = shallowReactive({a:1,b:{c:2})

	obj1.value.a = 2  //页面未更新

	obj2.b.c = 3  //页面未更新
}

import {triggerRef, shallowRef} from 'vue';
setup(){
	const  obj1 = shallowRef({a:1,b:{c:2})
    obj1.value.a = 2 //页面没有发生更新，因为只监听value第一层

	triggerRef(obj1);   // 强制更新