当前位置：网站首页>7. Data broker presentation

7. Data broker presentation

2022-07-03 19:38:00 【Shura MIUI】 

1. Vue Data brokers in :
 adopt vm Object to represent data Operation of properties in object ( read / Write )
2.Vue Benefits of data brokers in :
 More convenient operation data Data in 
3. The basic principle :
 adopt 0bject . defineProperty( ) hold data All properties in the object are added to vm On .
 For each   Add to vm Properties on , All specify a getter/setter.
 stay getter/setter Operate inside ( read / Write ) data The corresponding attribute in .

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
	</body>
</html>

<script>
	let obj1 = {
    
		x: 100
	};
	let obj2 = {
    
		y: 200
	};
	Object.defineProperty(obj2, 'x', {
    
		// to obj2 Add attribute x
		// When someone visits obj2.x When to return to obj1.x
		get() {
    
			return obj1.x;
		},
		// When someone modifies the value obj2.x Assign values to obj1.x
		set(value) {
    
			obj1.x = value;
		}
	})
</script>
原网站

版权声明
本文为[Shura MIUI]所创，转载请带上原文链接，感谢
https://yzsam.com/2022/02/202202150128089916.html

边栏推荐

猜你喜欢

随机推荐