var obj = {
            name: "abc",
            age: 123,
            card: [‘visa‘, ‘master‘],
            wife: {
                name: ‘bcd‘,
                son: {
                    name: ‘aaa‘
                }
            }
        }
        var obj1 = {

        }
        //深度拷貝
 

        function deepClone(origin, target) {
            var target = target || {},
                toStr = Object.prototype.toString,
                arrStr = "[object Array]";
            for (var prop in origin) {
                if (origin.hasOwnProperty(prop)) {
                    if (origin[prop] !== "null" && typeof
 
 (origin[prop]) == ‘object‘) {
                        // if (toStr.call(origin[prop]) == arrStr) {
                        //     target[prop] = [];
                        // } else {
                        //     target[prop] = {};
                        // }
                        target[prop] = toStr.call(origin[prop]) == arrStr ? [] : {};
                        deepClone(origin[prop], target[prop]);
                    } 
 
else {
                        target[prop] = origin[prop];
                    }
                }
            }
            return target;
        }
        deepClone(obj, obj1);

JavaScript 實現深度拷貝