Inline mathjax in image caption renders as display

[TomClabault]

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• I read through FAQ and searched through the past issues, none of which addressed my issue.
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Bug description

Inline mathjax in image caption renders as display

How to reproduce the bug

<div class="caption">
    Inline $$Mathjax$$ isn't inline.
</div>

Error messages and logs

No response

What operating system are you using?

Windows

Where are you seeing the problem on?

Running locally with Docker

More info

Expected result:
Should render all 4 words on the same line

Result observed:

Note that this isn't really only related to image captions. Having the Mathjax code in a simple <div> with no class renders the same (although not centered within the page).

[m-julian]

@TomClabault From the mathjax documentation :

The default math delimiters are $$...$$ and \[...\] for displayed mathematics, and \(...\) for in-line mathematics. Note in particular that the $...$ in-line delimiters are not used by default. That is because dollar signs appear too often in non-mathematical settings, which could cause some text to be treated as mathematics unexpectedly.

The $$...$$ should be used for displayed mathematics, which are on separate lines. You should be able to use $...$ or \(...\) for the in-line mathematics. Can you try these instead?

[CodeLikeAGirl29]

The issue you're encountering happens because $$ in MathJax is used for display math, not inline math. To render inline math in MathJax, you should use single dollar signs $...$ instead of double dollar signs $$...$$.

Here’s how to fix it:

<div class="caption">
    Inline $Mathjax$ isn't inline.
</div>

If you want to configure MathJax to recognize $$ for inline math as well, you'll need to adjust the MathJax configuration. Add the following configuration in your MathJax setup:

MathJax = {
  tex: {
    inlineMath: [['$', '$'], ['\\(', '\\)']],
    displayMath: [['$$', '$$'], ['\\[', '\\]']]
  }
};

This config ensures that $...$ is used for inline math and $$...$$ for display math.

#hacktoberfest

[TomClabault]

Looks good and simple, waiting on #2795 to try this out!