Yew: Allow `Option`s in html! class.

[djahandarie]

Right now I need to write code like this:

html! {
    <div
        class=vec![
            Some("thing"),
            thing.new.as_some("new")
        ].iter().flatten().collect::<Vec<_>>()
    />
}

It'd be nice if I could just directly write

html! {
    <div
        class=vec![
            Some("thing"),
            thing.new.as_some("new")
        ]
    />
}

As well as the tuple version: class=((Some(thing), thing.new.as_some("new")).

[jstarry]

https://github.com/yewstack/yew/pull/1085 ;)

[djahandarie]

I've never had negative time-to-implementation on a feature request before. :laughing: Amazing.

Sorry for the noise and thank you!

[jstarry]

@djahandarie https://github.com/yewstack/yew/releases/tag/0.16.0 🎉