{} + [] === 0 is false in nodejs but true in chrome

[himself65]

Version

16.x, 18.x

Platform

Linux himself65 5.15.0-48-generic #54-Ubuntu SMP Fri Aug 26 13:26:29 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

What do you see instead?

[himself65]

Maybe related to #44650?

[bnoordhuis]

The REPL evaluates it as ({} + [] === 0) - note the parens. It's the difference between these two:

> eval('{} + [] === 0')
true
> eval('({} + [] === 0)')
false

Without the parens, the {} is an empty block, not an object literal. Replace it with {1 + 2 + 3} and you get the same result. edit: I didn't make it clear but what is actually compared is +[] === 0, the {} is a red herring.

Not really a bug, just mildly unexpected behavior.

[himself65]

Thanks for the correct!