var obj = {a: 25, b: 50, c: 75};

var A = Object.create(obj);

var B = Object.create(obj);

​

A.a = 30;

B.a = 40;

​

alert(obj.a + " " + A.a + " " + B.a); // 25 30 40

var arr1 = [1, 2, 3]

var arr2 = [...arr1]

​

arr2.push(4)

​

console.log(arr1) // [1, 2, 3]

console.log(arr2) // [1, 2, 3, 4]

​

// Or

​

var obj1 = { a: 1 }

var obj2 = {...obj1}

​

obj2.a = 2

​

console.log(obj1) // { a: 1 }

console.log(obj2) // { a: 2 }

​

// ... spreads the array/object

const obj = { foo: { bar: "baz" } };

const shallowClone = { ...obj };