{} + [] - why it is 0 or [object Object]?

Question

If you open a JS Console in your browser (in my case Chrome) and type:

{} + []

you will get 0, but when you type

console.lo         


        

Answer 1

Empty object as {} returns "[object Object]" when you call its toString() method. Empty array returns "" when you call its toString() method. Thus, console.log({} + []) will output "[object Object]"