What is the problem?
On beta, I am seeing javascript errors:
Uncaught TypeError: n.closest is not a function
ze https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1
js https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1
js https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1
n https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1
<anonymous> https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1
<anonymous> https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1
index.js:1:38014
ze https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1
(Async: EventListener.handleEvent)
js https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1
js https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1
n https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1
<anonymous> https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1
<anonymous> https://wikidata.beta.wmflabs.org/w/extensions/Popups/resources/dist/index.js?0d5d7:1This seems to happen on most pages I have tested whenever I tab away or the page loses focus.
I have only seen this happen on Firefox so far. I cannot reproduce on Chromium.
Steps to reproduce problem
- On Firefox, go to a page on beta (e.g. https://en.wikipedia.beta.wmflabs.org/wiki/Main_Page)
- Open devtools
- Click anywhere on the page (not a link) to give it focus
- Move to another tab or click the browser's navigation URL
Expected behavior: No error
Observed behavior: See the above error in the logs
Environment
Browser: Firefox 102 Debian and Firefox 113 Windows 11 (emulated)
Wiki(s): various beta including https://en.wikipedia.beta.wmflabs.org MediaWiki 1.41.0-alpha (456b507) 06:51, 15 May 2023. Previews – (de881b7) 06:33, 15 May 2023.