CODEWITHSUNDEEP
node.js
Ahmed
Ahmed

Reputation: 1359

why does comparing two objects with === operation return false

I have the following code 

    console.log(typeof id1, typeof id2)
    console.log(id1, id2)
    if (id1 === id2) {

        return true
    }else{
        return false
    }

If I execute the following code I end up with id1 of type Object and the same for id2. when I compare them with === it returns false even thought they are of the same type. I know that if I use == this will be true because type checking is not enforced. Can someone clarify why it returns false with === operator even though the type is the same.

The following is the result printed using console.log

object , object
5e90603e7f0d251cab9253c6 , 5e90603e7f0d251cab9253c6

The ids are mongoose ObjectId

Upvotes: 0

Views: 239

Answers (1)

zishone
zishone

Reputation: 1244

Because objects in javascript are reference variables, whats happening there is the memory allocation are the one being compared.

If your comparing objectIds what you can do is:

id1.toString() === id2.toString()

Upvotes: 3

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