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mathjax4 compatibility #1110

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mathjax4 compatibility #1110

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ad17443
mathjax4 compat
ilia-kats Mar 4, 2026
3c3d94b
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Mar 4, 2026
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22 changes: 14 additions & 8 deletions myst_parser/sphinx_ext/mathjax.py
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Original file line number Diff line number Diff line change
Expand Up @@ -59,22 +59,28 @@ def override_mathjax(app: Sphinx):

mjax_classes = app.env.myst_config.mathjax_classes # type: ignore[attr-defined]

if "mathjax3_config" in app.config:
mathjax_opt = None
for opt in ("mathjax4_config", "mathjax3_config"):
if getattr(app.config, opt, None):
mathjax_opt = opt
break
if mathjax_opt is not None:
# sphinx 4 + mathjax 3
app.config.mathjax3_config = app.config.mathjax3_config or {}
app.config.mathjax3_config.setdefault("options", {})
# sphinx 9 + mathjax 4
config = getattr(app.config, opt, {}) or {}
config.setdefault("options", {})
if (
"processHtmlClass" in app.config.mathjax3_config["options"]
and app.config.mathjax3_config["options"]["processHtmlClass"]
!= mjax_classes
"processHtmlClass" in config["options"]
and config["options"]["processHtmlClass"] != mjax_classes
):
log_override_warning(
app,
3,
app.config.mathjax3_config["options"]["processHtmlClass"],
config["options"]["processHtmlClass"],
mjax_classes,
)
app.config.mathjax3_config["options"]["processHtmlClass"] = mjax_classes
config["options"]["processHtmlClass"] = mjax_classes
setattr(app.config, opt, config)
elif "mathjax_config" in app.config:
# sphinx 3 + mathjax 2
app.config.mathjax_config = app.config.mathjax_config or {}
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