对象解构与扩展运算符配对是否会在内存中创建新引用？

Question

I have a function where I want to omit a property ('uuid') from an object ('readingListObj') without mutating the object itself.

Will implementing object destructuring paired with the spread operator on the 'readingListItem' object create a new reference for 'uuid' and 'item'?

removeId(readingListObj) {
    const { uuid, ...item } = readingListObj // <---will this line create a new ref for'uuid' and 'item'?

    return item
  }

Answer 1

The simplest approach would be to just check

 const object1 = {a: 1, b: 2, c: {c: 1}}; const {a, ...object2} = object1; // try to modify basic value property object2.b = 3; console.log(object2.b, object1.b); // returns different values meaning that objects are indeed different // try to modify object value property object2.cc = 2 console.log(object2.cc, object1.cc) // returns the same values

The second modification returning same values means that even though destructurizing created a new object it didn't do a deep copy of it, so there is still a possibility of mutation of the original object.