Function expressions in :if ?

[exside]

First of all, thank you for sprae, just started playing around with it and I like it a lot!

I was trying to do <pre :if="() => !!(Object.values($selected).filter(x => x).length)"> expecting that when the $selected object does not contain any values in it's props the <pre> element wouldn't show (i tripplechecked, the expression does work and evaluates to either 0 without !! or false when "casting" to bool, I'd expect both to work, e.g. falsy values in :if).

Am I doing something wrong or is not currently not possible to use functions in :if?

thanks for a quick reply and keep the great work up!

[dy]

Hi @exside! :if takes value directly, it doesn't have to be a function.
Just do <pre :if="!!(Object.values($selected).filter(x => x).length)">.

[dy]

It makes me wonder if it should take functions as value.
Do you have a particular example where you need :if to be a function and plain code doesn't suffice?

[dy]

It's pretty massive change, I'll add function support in sprae v12.