\overline fails

[cebola2]

Issue Summary

\overline does not produce a line as it should. It is not caused by screen resolution.

Steps to Reproduce:

Try typesetting \overline{B}

Technical details:

• MathJax Version: 3.0.4
• Client OS: Linux Mint 19.3 64 bits
• Browser: Firefox 75.0 (64 bits), Chromium 80.0.3987.163

Supporting information:

• https://cdi2tp.math.tecnico.ulisboa.pt/test It's the first example.
  
• MathJax configuration: https://cdi2tp.math.tecnico.ulisboa.pt/scripts/mathjax-config.js
• Loading MathJax with https://cdi2tp.math.tecnico.ulisboa.pt/mathjax3/es5/tex-mml-chtml.js

[dpvc]

Thanks, I can confirm the problem. The extenders aren't be placed properly (and so they fall outside the clipping region). I'll look into it further.

The issue is CHTML-specific, so switching to SVG output would work around the problem for now.

[dpvc]

OK, I found it. A change in 3.0.4 caused an element to be display: block that used to be display: inline-block, and that caused horizontal extenders to be misplaced.

You can work around it for now by adding

  mjx-stretchy-h > * > mjx-c::before {display: inline-block}

to your CSS.

[cebola2]

Thanks! Your support is amazing.

[dpvc]

I put out a hit-fix release (3.0.5) that fixes this issue.