vue3中proxy的基本用法说明_vue.js

  <script>
        var target = {
            name: "xiaoming",
            age: 18
        }
        // handler 是一个对象
        const handler = {
            set(target, prop, value) {
                let result = Reflect.set(target, prop, value)
                console.log("设置的操作" + result)
                return true;
            },
            get(target, value) {
                let result = Reflect.get(target, value)
                console.log("获取的的操作" + result)
            }
        }
        let proxy = new Proxy(target, handler);
        proxy.coure = "java"
        console.log(proxy)
    </script>

<div id='app'></div>
<script>
	const data = {
		name:'hello',
		age:10
	}
	const vm = new Proxy(data,{
		get(target,p,receiver){
			// 1.target就是代理的data对象
			// 2.p 就是data中的每一个属性(name.age)
			// 3.receiver就是Proxy代理对象本身
			return target[p]
		},
		set(target,p,value,receiver){
			// 1.value就是最新的值
			console.log('receiver:',receiver)
			if(taregt[p]===value) return
			target[p] = value
			document.querySelector('#app').textContent = target[p]
		}
	})
	vm.name = 'hello,vue'
</script>