I'm using Ubuntu 24.04, Chrome and 1.46.0-wmf.18 (rMWc6afb97999a5) 15:05, 5. Mär. 2026 mit MathJax rendering.
Procedure:
Is:
Should:
| Status | Subtype | Assigned | Task | ||
|---|---|---|---|---|---|
| Open | Feature | JeanCASPAR | T397585 Provide a macro for putting arbitrary Unicode content in <mo> tag | ||
| Open | Physikerwelt | T271001 Transition to client-side MathJax SVG rendering as default | |||
| Open | BUG REPORT | Physikerwelt | T375238 Client-side MathJax rendering problems | ||
| Resolved | BUG REPORT | Krinkle | T419356 MathJax rendering missing after saving edit with VisualEditor |
I can reproduce this by changing my preferences to MathJax rendering, enabling the preview without reloading the page, then previewing the page twice. On first preview, the formula displays correctly, on second preview I only get MathML. I'm testing on this page.
If I run window.MathJax.startup.defaultReady(); in my JavaScript console, the math fixes itself. What I assume is the issue is that this line is only called upon loading the module (first preview) but not any other time. Do you think the correct patch would be to change that line to mw.hook( 'wikipage.content' ).add( window.MathJax.startup.defaultReady );?
I believe T422077: MathJax missing from DiscussionTools reply preview is a duplicate of this bug, because DiscussionTools is essentially previewing the page multiple times, leading to this issue.
Change #1325581 had a related patch set uploaded (by Krinkle; author: Krinkle):
[mediawiki/extensions/Math@master] ext.math.mathjax: Call MathJax.typeset() from `wikipage.content` hook
Change #1325581 merged by jenkins-bot:
[mediawiki/extensions/Math@master] ext.math.mathjax: Call MathJax.typeset() from `wikipage.content` hook
Change #1326896 had a related patch set uploaded (by Krinkle; author: Krinkle):
[mediawiki/extensions/Math@wmf/1.47.0-wmf.16] ext.math.mathjax: Call MathJax.typeset() from `wikipage.content` hook
Change #1326897 had a related patch set uploaded (by Krinkle; author: Krinkle):
[mediawiki/extensions/Math@wmf/1.47.0-wmf.15] ext.math.mathjax: Call MathJax.typeset() from `wikipage.content` hook
Change #1326896 merged by jenkins-bot:
[mediawiki/extensions/Math@wmf/1.47.0-wmf.16] ext.math.mathjax: Call MathJax.typeset() from `wikipage.content` hook
Change #1326897 merged by jenkins-bot:
[mediawiki/extensions/Math@wmf/1.47.0-wmf.15] ext.math.mathjax: Call MathJax.typeset() from `wikipage.content` hook
Mentioned in SAL (#wikimedia-operations) [2026-08-18T20:48:29Z] <krinkle@deploy1003> Started scap sync-world: Backport for [[gerrit:1326896|ext.math.mathjax: Call MathJax.typeset() from wikipage.content hook (T434469 T419356 T422077)]], [[gerrit:1326897|ext.math.mathjax: Call MathJax.typeset() from wikipage.content hook (T434469 T419356 T422077)]]
Mentioned in SAL (#wikimedia-operations) [2026-08-18T20:50:32Z] <krinkle@deploy1003> krinkle: Backport for [[gerrit:1326896|ext.math.mathjax: Call MathJax.typeset() from wikipage.content hook (T434469 T419356 T422077)]], [[gerrit:1326897|ext.math.mathjax: Call MathJax.typeset() from wikipage.content hook (T434469 T419356 T422077)]] synced to the testservers (see https://wikitech.wikimedia.org/wiki/Mwdebug). Changes can now be verified there.
Mentioned in SAL (#wikimedia-operations) [2026-08-18T21:02:25Z] <krinkle@deploy1003> Finished scap sync-world: Backport for [[gerrit:1326896|ext.math.mathjax: Call MathJax.typeset() from wikipage.content hook (T434469 T419356 T422077)]], [[gerrit:1326897|ext.math.mathjax: Call MathJax.typeset() from wikipage.content hook (T434469 T419356 T422077)]] (duration: 13m 56s)