\textbf{1} renders incorrectly in MathML and client-side MathJax modes
Closed, ResolvedPublicBUG REPORT
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Authored By

	SalixAlba
	Jun 17 2025, 5:23 AM

Description

Steps to replicate the issue (include links if applicable):

Set rendering mode to client side MathJax
Enter the formula <math>\textbf{1}</math>

What happens?:

Renders as

What should have happened instead?:

Renders as a single digit.

Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):

Other information (browser name/version, screenshots, etc.):

Chrome, Windows

This bug is simplified from a formula in https://en.wikipedia.org/wiki/Transcendental_number

Fixed in

MathJax
Firefox
Chrome

Details

Related Changes in Gerrit:

	Subject	Repo	Branch	Lines +/-
	Fix rendering of bold numbers in Chrome	mediawiki/extensions/Math	master	+5 -6
	Fix regression in number rendering	mediawiki/extensions/Math	master	+9 -0

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Related Objects
Search...

Status	Subtype	Assigned	Task
Open	Feature	JeanCASPAR	T397585 Provide a macro for putting arbitrary Unicode content in <mo> tag
Open		Physikerwelt	T271001 Transition to MathML rendering as default
Open		None	T375318 Native MathML mode formatting bugs
In Progress	BUG REPORT	Physikerwelt	T375238 Client-side MathJax rendering problems
Resolved	BUG REPORT	Physikerwelt	T397120 \textbf{1} renders incorrectly in MathML and client-side MathJax modes

Event Timeline

SalixAlba created this task.Jun 17 2025, 5:23 AM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptJun 17 2025, 5:23 AM

Alternative like <math>\mathbf{a}</math> or <math>\mathbf{a1}</math> render fine.

Physikerwelt claimed this task.Jun 21 2025, 7:06 AM

Physikerwelt triaged this task as High priority.Jun 21 2025, 7:14 AM

temml.org generates <math display="block" class="tml-display"><mtext>𝟏</mtext></math> which seems to be what we want to get as well

Here the problem is already in the checking phase. text... is treated as as any macro so one could write \textbf{\sin(x)} which is not possible in temml. We (mathoid) outputs the plain input.

Change #1162254 had a related patch set uploaded (by Physikerwelt; author: Physikerwelt):

[mediawiki/extensions/Math@master] Fix regression in number rendering

https://gerrit.wikimedia.org/r/1162254

gerritbot added a project: Patch-For-Review.Jun 21 2025, 7:58 AM

Eventually, it was a regression introduced in https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Math/+/1149743 sorry!

Change #1162254 merged by jenkins-bot:

[mediawiki/extensions/Math@master] Fix regression in number rendering

https://gerrit.wikimedia.org/r/1162254

ReleaseTaggerBot added a project: MW-1.45-notes (1.45.0-wmf.7; 2025-06-24).Jun 21 2025, 12:00 PM

Maintenance_bot removed a project: Patch-For-Review.Jun 21 2025, 12:30 PM

Physikerwelt closed this task as Resolved.Jul 5 2025, 3:54 AM

Reopening per T390259

Physikerwelt mentioned this in T390259: <math>\mathbf{\Lambda}</math> not bold.Sep 7 2025, 7:06 PM

Physikerwelt lowered the priority of this task from High to Medium.Sep 7 2025, 8:31 PM

Physikerwelt updated the task description. (Show Details)

Change #1185367 had a related patch set uploaded (by Physikerwelt; author: Physikerwelt):

[mediawiki/extensions/Math@master] Fix rendering of bold numbers in Chrome

https://gerrit.wikimedia.org/r/1185367

gerritbot added a project: Patch-For-Review.Sep 7 2025, 8:48 PM

Change #1185367 merged by jenkins-bot:

[mediawiki/extensions/Math@master] Fix rendering of bold numbers in Chrome

https://gerrit.wikimedia.org/r/1185367

ReleaseTaggerBot edited projects, added MW-1.45-notes (1.45.0-wmf.18; 2025-09-09); removed MW-1.45-notes (1.45.0-wmf.7; 2025-06-24).Sep 8 2025, 8:00 PM

Maintenance_bot removed a project: Patch-For-Review.Sep 8 2025, 8:32 PM

Unfortunately, beta https://en.wikipedia.beta.wmcloud.org/ is not usable, but it works locally.

Chrome:

Screenshot 2025-09-10 at 18.38.30.png (1×1 px, 113 KB)

Physikerwelt closed this task as Resolved.Sep 10 2025, 4:46 PM