Not at all related to TiddlyWiki, but it is the same kind of general thing when troubleshooting anything in TiddlyWiki or anywhere else.
Just a really short journey into fixing some javascript code: BASIC Anywhere Machine: Troubleshooting the INSTR function - YouTube
From a guy who can’t stand looking at javascript, yet got it done.
Frigging javascript. Love it for the good stuff others have built with it. But man do I ever not suffer that language well …