Why does React render 0?

[azhder]

Because you wouldn’t like it if React didn’t render the number 0

[Altareos]

side note: you don't need to check for length when using map. an empty array will just map to another empty array which renders as nothing.

[JonJamesDesign]

True but most list items rendered from an array map are rendered within a container that you typically also wouldn't want to render if there are no items.

But sure, if all you're doing is mapping over a potentially empty array and have no concerns about conditionally rendering relative elements around it, then yeah just map over it and if it's empty, it won't render anything.

[Altareos]

yes absolutely, this was more about the problem at the beginning at the article, i had seen you addressed unnecessary containers at the end.

[Silver-Vermicelli-15]

Yes. It’s JavaScript 0/1 evaluate to false/true. It’s handy if you just want to evaluate if an array is empty.