Given that the new recommended way to write reg-event-fx handlers is to only return :db and :fx keys in the returned map, and that :fx should now be a vector of map entries/2-value vectors, should the example code in the tutorial/documentation be rewritten in that style? Stuff like this: http://day8.github.io/re-frame/dominoes-30k/#domino-3-effect-handling

I’m willing to open a PR if this is desired

Tho now that I'm looking, the infographics would also have to be updated, which I know nothing about

[:failed-to-compare "16.9.0" "16.9.0" #error {
 :cause "Cannot invoke \"Object.getClass()\" because \"target\" is null"
 :via
 [{:type java.lang.NullPointerException
   :message "Cannot invoke \"Object.getClass()\" because \"target\" is null"
   :at [clojure.lang.Reflector invokeInstanceMethod "Reflector.java" 97]}]
 :trace
 [[clojure.lang.Reflector invokeInstanceMethod "Reflector.java" 97]
  [shadow.cljs.devtools.server.npm_deps$make_engine invokeStatic "npm_deps.clj" 39]
  [shadow.cljs.devtools.server.npm_deps$make_engine invoke "npm_deps.clj" 32]
  [shadow.cljs.devtools.server.npm_deps$fn__17833$fn__17834 invoke "npm_deps.clj" 46]
  [clojure.lang.Delay deref "Delay.java" 42]
  [clojure.core$deref invokeStatic "core.clj" 2320]
  [clojure.core$deref invoke "core.clj" 2306]
  [shadow.cljs.devtools.server.npm_deps$fn__17833$fn__17836 invoke "npm_deps.clj" 52]
  [shadow.cljs.devtools.server.npm_deps$resolve_conflict invokeStatic "npm_deps.clj" 83]
  [shadow.cljs.devtools.server.npm_deps$resolve_conflict invoke "npm_deps.clj" 78]

Did you run npm install?

yea