To fix two shadow-cljs issues, simply restart it and wait :(

I solved five problems from Jacek’s Learn Re-Frame Pro course:

• Babel transpilation error (solved by restarting shadow-cljs; not understood yet :())
• Port already in use despite shutting previous instance down (wait, runs anyway, uses the same nrepl port as others that are running)
• Things not showing (mis-indent; instead of one fragment containing two elements, one fragrement contained one element, then the other element spilled over–due to ClojureScript returning only the last element, only this spilled element returned; a changed indent pulled it into the fragment due to my paredit extension)
• Image not showing (I misunderstood the reg-event-fx signature; the second paramater is a vector, [effect …params?]; I replaced {:keys [img]} with [_ {:keys [img]}], and the image suddenly existed)
• h2 under an h2 (looked at Jacek’s working code and learned to make a conditional: if the thing’s a string, wrap it in the h2 tag; if it’s not, pass in a raw component; obvious, but as I typed out what Jacek showed, I missed this.)