fix: use consistent equation numbering for html-math-method and html-math-method.method (MathJax and KaTeX)

Author: mcanouil

news/changelog-1.8.md

@@ -16,6 +16,7 @@ All changes included in 1.8:
 - ([#12259](https://github.com/quarto-dev/quarto-cli/issues/12259)): Fix conflict between `html-math-method: katex` and crossref popups (author: @benkeks).
 - ([#12734](https://github.com/quarto-dev/quarto-cli/issues/12734)): `highlight-style` now correctly supports setting a different `light` and `dark`.
 - ([#12747](https://github.com/quarto-dev/quarto-cli/issues/12747)): Ensure `th` elements are properly restored when Quarto's HTML table processing is happening.
+- ([#12766](https://github.com/quarto-dev/quarto-cli/issues/12766)): Use consistent equation numbering for `html-math-method` and `html-math-method.method` (MathJax and KaTeX)
 
 ### `revealjs`
 

src/resources/filters/crossref/equations.lua

@@ -63,6 +63,9 @@ function process_equations(blockEl)
         else
           local eqNumber = eqQquad
           local mathMethod = param("html-math-method", nil)
+          if type(mathMethod) == "table" and mathMethod["method"] then
+            mathMethod = mathMethod["method"]
+          end
           if _quarto.format.isHtmlOutput() and (mathMethod == "mathjax" or mathMethod == "katex") then
             eqNumber = eqTag
           end