i'm working on a legacy app that uses cfform - i see that CF creates

_CF_checkfoo

functions for JS handlers and injects them into script tags... what would cause those functions to not get injected? I'm no longer seeing them after a lot of changes to the server and I'm not sure which change caused it

depends on what 'a lot of changes' means cfform is an extension that has to be added to lucee, it's not a native tag. so if somebody re-did the server deployment, check to see if it's still there (although iirc, it will just error if you call an unsupported tag)

it's ACF, and it looks like it's only happening on some pages. i converted it to coldbox, so i'm wondering if that's got something to do with it... it is very frustrating!

Nah, coldbox doesn't interfere with cfform at all (we still have a couple old pages with cfform on them) although we are on lucee

do you use any server rewrites?

If one of the changes was an upgrade to CF25, might be deprecated - https://helpx.adobe.com/coldfusion/deprecated-features.html

no still on acf2021

wow. good sleuthing! Glad you figured it out