Why is it true?

Question

https://code.sololearn.com/cKy5i6mx5Tq4/?ref=app

Answer 1

The explanation is in the method valueOf() . When a is called returns valueOf taht is this.num += 1;

a == 1
//first a.num increases in 1 then check a == 1 and return true
//now a.num has 1

a == 2
//a.num increase in 1 one more time, a.num has 2, and return true

Please read

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/valueOf

Answer 2

Shivam agrawal do not copy answers from others, if you have nothing to contribute better do not say anything

Answer 3

luis calderón Thanks so much! ☺️☺️☺️

Answer 4

It's return true because a is a not null object so if you try a==0 you will see false ...