aria-level set to 0 is invalid

[Michael Klem]

Been running accessibility tests on my site and noticed that MathJax defaults to setting the aria-level attribute to 0, which is an invalid value according to the MDN docs.

The Axe core/playwright npm module marks this as an error as well.

Is this an actual issue in MathJax? I could not find any issues related to this.

This can be found on the MathKJax demo site.

Thank you

[Davide Cervone]

Thanks for the report.  The aria-level is actually left over from an earlier iteration of the expression explorer.  I will make a pull request to change how that is being used.

Davide

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