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kotlinlang

```Kotlin code:
react {
    ReactSidebar {
        ReactSidebarMenu {
            attrs.iconShape = "square"
            ReactSidebarMenuItem {
                //attrs.icon= ???
                +"Menu one "
            }
            ReactSidebarMenuItem {
                +"Menu two "
            }
        }
    }
}```


This is working for me:
```external interface ReactSidebarMenuItemProps : RProps {
    var icon: ReactElement
}

                        ReactSidebarMenuItem {
                            attrs.icon = createElement("i", obj { className = "fas fa-check" })
                            +"Menu one "
                        }```
With kvision-fontawesome module included to have FA css available.

Probably there is some better way, but I'm not a React expert :wink:

Where is this `createElement` fun is defined?   any `Document` object?

Got it.. it is react.createElement.  Cheers.

It shows the icon, but gives a warning `Warning: Invalid DOM property `class`. Did you mean `className`?`

I changed it to.
```attrs.icon = createElement("i", obj { `className` = "fas fa-user" })```
and there is no warning..

I haven't noticed the warning. Yep, use className instead (and no back ticks needed)