你可以原型对象，然后调用对象实例，每次你想使用和改变对象:

function object () {
  this.x = 5;
  this.y = 5;
}
var obj1 = new object();
var obj2 = new object();
obj2.x = 6;
console.log(obj1.x); //logs 5

也可以将参数传递给对象构造函数

function object (x, y) {
   this.x = x;
   this.y = y;
}
var obj1 = new object(5, 5);
var obj2 = new object(6, 6);
console.log(obj1.x); //logs 5
console.log(obj2.x); //logs 6

希望这对你有帮助。

如果你正在使用coffee-script，它就像:

newObject = {}
newObject[key] = value  for own key,value of oldObject

虽然这不是一个深度克隆。

如果你正在使用普通对象和数组，并且不关心克隆函数或递归引用，这里有一个简单的deepClone实现，它适用于普通对象、数组、字符串、数字、正则表达式、日期等。

// Simple Deep Clone
// Does not clone functions or handle recursive references.
function deepClone(original) {
  if (original instanceof RegExp) {
    return new RegExp(original);
  } else if (original instanceof Date) {
    return new Date(original.getTime());
  } else if (Array.isArray(original)) {
    return original.map(deepClone);
  } else if (typeof original === 'object' && original !== null) {
    const clone = {};
    Object.keys(original).forEach(k => {
      clone[k] = deepClone(original[k]);
    });
    return clone;
  }
  return original;
}

// Usage:

const obj = { n: 1, a: [ { a: 1 }, { a: 2 } ], d: new Date(), s: 'foo' };
const clone = deepClone(obj);

Object.defineProperty(Object.prototype, "extend", {
    enumerable: false,
    value: function(from) {
        var props = Object.getOwnPropertyNames(from);
        var dest = this;
        props.forEach(function(name) {
            if (name in dest) {
                var destination = Object.getOwnPropertyDescriptor(from, name);
                Object.defineProperty(dest, name, destination);
            }
        });
        return this;
    }
});

这将定义一个您可以使用的扩展方法。代码来自本文。

var obj2 = JSON.parse(JSON.stringify(obj1));

在Github上也有一个项目，旨在成为jQuery.extend()的更直接的端口:

https://github.com/dreamerslab/node.extend

下面是一个例子，来自jQuery文档:

var extend = require('node.extend');

var object1 = {
    apple: 0,
    banana: {
        weight: 52,
        price: 100
    },
    cherry: 97
};

var object2 = {
    banana: {
        price: 200
    },
    durian: 100
};

var merged = extend(object1, object2);