@kingcode you can use #js {:colSpan ...}
. Both notations mean the same thing
~ cljs
ClojureScript 1.10.520
cljs.user=> #js{:colSpan 123}
#js {:colSpan 123}
cljs.user=> #js{"colSpan" 123}
#js {:colSpan 123}
cljs.user=>
om
is incomplete (but functional) and do not receive new features since 2017 (due the lack of time of David)
#fulcro is a "complete" implementation from the same idea.