这是一个没有Object.assign（）陷阱的现代解决方案（不通过引用复制）：

const cloneObj = (obj) => {
    return Object.keys(obj).reduce((dolly, key) => {
        dolly[key] = (obj[key].constructor === Object) ?
            cloneObj(obj[key]) :
            obj[key];
        return dolly;
    }, {});
};

由于mindeeavor指出要克隆的对象是一个“字面构造的”对象，因此解决方案可能是简单地多次生成对象，而不是克隆对象的实例：

function createMyObject()
{
    var myObject =
    {
        ...
    };
    return myObject;
}

var myObjectInstance1 = createMyObject();
var myObjectInstance2 = createMyObject();

var x = {'e': 2, 'd': 8, 'b': 5};

const y = {};
for(let key in x) {
    y[key] = x[key];
}
console.log(y); // =>>> {e: 2, d: 8, b: 5}

const z = {};
Object.keys(x).forEach(key => {
    z[key] = x[key];
});
console.log(z); // =>>> {e: 2, d: 8, b: 5}

const w = {};
for(let i = 0; i < Object.keys(x).length; i++) {
    w[Object.keys(x)[i]] = x[Object.keys(x)[i]];
}
console.log(w); // =>>> {e: 2, d: 8, b: 5}

const v = {};
for(let key of Object.keys(x)) {
    v[key] = x[key];
}
console.log(v); // =>>> {e: 2, d: 8, b: 5}

x['q'] = 100;   // Altering x will not affect the other objects

console.log(x); // =>>> {e: 2, d: 8, b: 5, q: 100}
console.log(y); // =>>> {e: 2, d: 8, b: 5}
console.log(z); // =>>> {e: 2, d: 8, b: 5}
console.log(w); // =>>> {e: 2, d: 8, b: 5}
console.log(v); // =>>> {e: 2, d: 8, b: 5}

使用jQuery，可以使用extend进行浅层复制：

var copiedObject = jQuery.extend({}, originalObject)

对copiedObject的后续更改不会影响originalObject，反之亦然。

或制作深度副本：

var copiedObject = jQuery.extend(true, {}, originalObject)

我已经完成了上述所有解决方案，它们都很好。然而，您可以使用另一种方法来克隆对象（值不引用）。对象分配

let x = {
    a: '1',
    b: '2'
}

let y = Object.assign({}, x)
y.a = "3"

console.log(x)

输出将为

{ a: '1', b: '2' }

此外，您还可以使用相同的方法克隆阵列。

clonedArray = Object.assign([], array)

根据Apple JavaScript编码指南：

// Create an inner object with a variable x whose default
// value is 3.
function innerObj()
{
        this.x = 3;
}
innerObj.prototype.clone = function() {
    var temp = new innerObj();
    for (myvar in this) {
        // this object does not contain any objects, so
        // use the lightweight copy code.
        temp[myvar] = this[myvar];
    }
    return temp;
}

// Create an outer object with a variable y whose default
// value is 77.
function outerObj()
{
        // The outer object contains an inner object.  Allocate it here.
        this.inner = new innerObj();
        this.y = 77;
}
outerObj.prototype.clone = function() {
    var temp = new outerObj();
    for (myvar in this) {
        if (this[myvar].clone) {
            // This variable contains an object with a
            // clone operator.  Call it to create a copy.
            temp[myvar] = this[myvar].clone();
        } else {
            // This variable contains a scalar value,
            // a string value, or an object with no
            // clone function.  Assign it directly.
            temp[myvar] = this[myvar];
        }
    }
    return temp;
}

// Allocate an outer object and assign non-default values to variables in
// both the outer and inner objects.
outer = new outerObj;
outer.inner.x = 4;
outer.y = 16;

// Clone the outer object (which, in turn, clones the inner object).
newouter = outer.clone();

// Verify that both values were copied.
alert('inner x is '+newouter.inner.x); // prints 4
alert('y is '+newouter.y); // prints 16

史蒂夫