Update web_chatter_position.esm.js

[a-khalil-ecoservice]

when I install the Modul mass_mailing or Knowledge und I will create a new Mailing I get a error when the chatter position is bottom.

[Armitxes]

To help out a bit, I've described the issue - fixes #2596

[ivantodorovich]

LGTM 👍🏻

Thanks for fixing this !

I'm wondering if this check should be done a few lines above, though, before even cloning the chatterContainerHookXml.

Something like this:

            } else {
                const formSheetBgXml = res.querySelector(".o_form_sheet_bg");
+               if (!formSheetBgXml) {
+                   return res;
+               }
                const sheetBgChatterContainerHookXml =
                    chatterContainerHookXml.cloneNode(true);
                sheetBgChatterContainerHookXml.classList.add("o-isInFormSheetBg");
                sheetBgChatterContainerHookXml.setAttribute("t-if", true);

In any case, I'm not blocking over this.

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Could you clean up the commits, though ?
Ideally: keep only one commit, describing the issue that you're fixing