JavaScript error when visiting closed questions

Question

I noticed an error in my JS console when visiting closed questions on SO:

Uncaught (in promise) TypeError: n is null
    <anonymous> https://cdn.sstatic.net/Js/questions/show.en.js?v=f6ce488fd0ca:1
    <anonymous> https://cdn.sstatic.net/Js/questions/show.en.js?v=f6ce488fd0ca:1
    promise callback* https://cdn.sstatic.net/Js/questions/show.en.js?v=f6ce488fd0ca:1
    <anonymous> https://cdn.sstatic.net/Js/questions/show.en.js?v=f6ce488fd0ca:1
    <anonymous> https://cdn.sstatic.net/Js/questions/show.en.js?v=f6ce488fd0ca:1
show.en.js:1:21974

Seems to be because of this JS:

const n=document.querySelector("#post-form .js-post-body-field[data-post-type-id='2']"),
s=n.parentElement.querySelector("#js-stacks-editor-container");

Where #post-form does not exist in closed questions. Noticed it because it was preventing some userscript from running.

I checked on another network site and didn't notice the same thing, which is why it's posted here and not MSE.

I can't reproduce this. I tried this question which has an answer and this one without an answer. I also tried both with the new editor enabled and disabled. I also tried opting out and into the experiments. — VLAZ, Commented Mar 25 at 15:53
@VLAZ is there an element with ID post-form in your HTML? For me, on open questions it's right after the answer elements, but is not there on closed questions. I have both the disable new editor and experiment opt-out toggles off. No ad blockers here either, and of course I disabled my userscript extension. — miken32, Commented Mar 25 at 15:56
Getting the same error as OP on both questions VLAZ linked. All combinations of new-editor and experiments optin. — cafce25, Commented Mar 25 at 16:02
I'm on rev 2025.3.25.24352 if that matters. If not an A/B test, it might be a partial roll-out. — VLAZ, Commented Mar 25 at 16:10
I see the same thing in my console. #post-form is the whole "Your answer" form, so it makes sense why it wouldn't be on closed posts. — aynber, Commented Mar 25 at 17:22

Alex Warren · Accepted Answer · 2025-03-26 08:23:19Z

5

Thanks for reporting this - it is fixed now.

answered Mar 26 at 8:23

Alex WarrenStaffMod

7,54721 silver badges12 bronze badges

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