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GeezerVison is showing github.com — Fix issue where plot fails to render if unsupported MathJax version is present on page by emilykl · Pull Request #7951 · plotly/plotly.js

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@emilykl

@emilykl emilykl commented Aug 9, 2026

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Closes #7926

Description

Fixes an issue where the presence of an unsupported MathJax version on the page would cause the entire plot not to render if it contained a tex string ($...$).

This was due to the code path which detected an unsupported MathJax version not calling _callback() directly the way we did in other failure cases. This PR adds a call to _callback() in that case, and adds regression tests for the issue.

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emilykl added 3 commits August 9, 2026 12:26
@emilykl
ensure that plot still renders in the case where an unsupported MathJ…
716bac1 
…ax version is present
@emilykl
add regression tests
dae92a8
@emilykl
add draftlog
64eeb40
@emilykl
emilykl changed the base branch from master to v4.0 August 9, 2026 16:31
@emilykl
emilykl requested a review from camdecoster August 9, 2026 16:31
@emilykl emilykl added this to the v4.0.0 milestone Aug 9, 2026
@emilykl emilykl changed the title Fix issue where plot failed to render if unsupported MathJax version was present on page Fix issue where plot failed to render if unsupported MathJax version is present on page Aug 10, 2026
@camdecoster camdecoster changed the title Fix issue where plot failed to render if unsupported MathJax version is present on page Fix issue where plot fails to render if unsupported MathJax version is present on page Aug 10, 2026
camdecoster
camdecoster approved these changes Aug 10, 2026
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Looks good. I left one suggestion.

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Comment thread draftlogs/7951_fix.md Resolved

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Comment thread src/lib/svg_text_utils.js Resolved

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emilykl and others added 2 commits August 13, 2026 14:45
@emilykl
clean up MathJax version check
7f82b30
@emilykl @camdecoster
Update draftlogs/7951_fix.md
6aaf901 
Co-authored-by: Cameron DeCoster <[email protected]>
@emilykl
emilykl merged commit fcf6e99 into v4.0 Aug 13, 2026
244 of 247 checks passed

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@emilykl
emilykl deleted the fix-mathjax-issue branch August 13, 2026 19:17
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@camdecoster camdecoster camdecoster approved these changes

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v4.0.0

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Successfully merging this pull request may close these issues.

[BUG]: 4.0 RC: Unsupported MathJax version causes entire plot not to render

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@emilykl @camdecoster
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