<!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>
