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Object.defineProperty 监听对象属性变化 

<!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>

 

posted @ 2018-10-10 17:25  孟繁贵  阅读(2484)  评论(0)  编辑  收藏  举报
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