<!DOCTYPE html>
<html lang="zh"> <head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Object.defineProperty 监听对象属性变化</title>
</head> <body>
<script type="text/javascript">
let obj = {}
let value = ''
Object.defineProperty(obj, 'name', {
get: () => {
return value
},
set: (newVal) => {
console.log('检测到变化', newVal);
value = newVal;
}
})
console.log(obj.name, ' 1')
obj.name = 'mfg'
console.log(obj.name, ' 2')
</script>
</body> </html>
