select onChange changed to on-change after saving Joomla 4.1 form

Question

I have been successfully using a homemade article including a form and some javascript for a while now on Joomla 3 which also uses the Regularlabs Sourcerer plugin.

Turns out that I recently migrated this article to Joomla 4.1.1 (so far) as part of my website upgrade attempt and the script breaks.

Looking into what was saved, I figured that the select "onChange" element was transformed into "on-change"!

I then tried with a basic minimum code indicated below (nothing fancy) and here's what came out after save:

<select name="optone" size="1" id="optone" on-Change="javascript:setOptions(this.value)">
<option value="0">Choose a type</option>
<option value="1">Sports</option>
<option value="2">Educational</option>
</select>

I have tried to see if this could come from the editor I use, switching from JCE to TinyMCE, with no luck.

Could this be looking like a Joomla 4 "uncommented feature"?

Answer 1

Well, in fact, I found the issue. It is related to some settings of the editor. I will contact the developer.

---

[EDIT] Developer contact is unavailable if you don't have a paid subscription etc.

Anyway, what happens is that the Joomla 4 version of the editor (JCE) settings include a sort of HTML 4/5/Mixed validation switch.

By default, this validation is activated and this is what causes onChange to be changed to on-change which, obviously, prevents the script from working as expected.

If you deactivate the switch, the behavior goes back to normal.

Since I could not touch base with the developer, I could not raise a flag and/or get information about why this change happened.