Does RSX offer a way to _add_ a CSS classes conditionally?

[bluenote10]

I know that RSX allows something like this:

rsx! { 
    div { 
        class: if some_signal.get() { "some-class" },
        "Hello, World!" 
    }
}

However, what about the case when there are some common classes that should be extended (probably fairly common for tailwind users). This doesn't seem to compile, and so far I couldn't figure out a good solution:

rsx! { 
    div { 
        class: "some common classes " + if some_signal.get() { "activated-class" }
        "Hello, World!" 
    }
}

[ealmloff]

Yes, you can add a second class attribute that is optional. If they are both true, they will get merged automatically:

rsx! { 
    div { 
        class: "some common classes ",
        class: if some_signal.get() { "activated-class" }
        "Hello, World!" 
    }
}