`view!` supporting `Option` on attributes, props, and event listeners about leptos HOT 4 CLOSED

To clarify: Do you mean optional props on a component or optional attributes on a DOM element?

Both should actually already be possible so if you have an example of where it's not working I'd be happy to take a look!

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Sorry I didn't see the second half of the title when I posted this response, clearly.

Option<T> is support on attributes when T is a primitive type. It's supported on properties when T is a primitive or JsValue.

I don't support it on event listeners at the moment; note that Leptos is using global event delegation, so it's not actually adding an event listener on the element. (It does create the closure for the event listener once per instance and store it in the DOM, to be fair.)

For an event listener you'd actually need to support Fn() -> Option<Fn(web_sys::Event)> which seems a little messy to me. (Because a simple Option<Fn(web_sys::Event) isn't dynamic, since components don't re-run.)

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I see it does in fact work! I didn't try it because I didn't see it in the docs. It wasn't until I checked the trait implementations for IntoAttribute that I saw it was implemented for many primitive types.

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Great! I'll add something to the docs, too.

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