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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/jquery.min.js"></script>
    <style>
        div {
            width: 100px;
            height: 100px;
            background-color: pink;
        }
    </style>
</head>
 
<body>
    <div></div>
    <p>11</p>
    <script>
        $(function() {
            //第一种情况没有数值
            /*  var targetObj = {};
             var obj = {
                 id: 1,
                 name: "andy"
             };
             $.extend(targetObj, obj);
             console.log(targetObj); */
            //有数值 会覆盖原来的数据
            /*    var targetObj = {
                   id:0
               };
               var obj = {
                   id: 1,
                   name: "andy"
               };
               $.extend(targetObj, obj);
               console.log(targetObj); */
            var targetObj = {
                id: 0
            };
            var obj = {
                id: 1,
                name: "andy",
                msg: {
                    name: 1,
                }
            };
            /*  $.extend(targetObj, obj);
             //浅拷贝 
             console.log(targetObj);
             targetObj.msg.name = 2;
             console.log(targetObj);
             // */
            $.extend(true, targetObj, obj);
            //深拷贝 
            console.log(targetObj);
            targetObj.msg.name = 2;
            console.log(targetObj);
        })
    </script>
</body>
 
</html>

 运行结果

 

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本文链接：https://www.cnblogs.com/yao-655442/p/16383354.html