Is there a way for the display mode to work with line breaks?

[frnsys]

I recall being able to do the following in MathJax:

$$
x+2
$$

But I noticed that doesn't work in KaTeX. I have to do:

$$x+2$$

I have several old files that use the former format. Is there a way to allow that in KaTeX? I looked through the options but wasn't able to find anything.

[edemaine]

I'm pretty sure both inputs should work fine. Are you using auto-render, or something else to trigger KaTeX (e.g. a Markdown plugin)? If the latter, it's probably the plugin at fault. Can you share an example of exactly how you're using it that fails?

[frnsys]

Thanks for your quick response. I'm using auto-render. This is the snippet I'm using:

document.addEventListener("DOMContentLoaded", function() {
    renderMathInElement(document.body, {
        delimiters: [
          {left: "$$", right: "$$", display: true},
          {left: "¦", right: "¦", display: false},
        ]
    });
});

It is applied to HTML generated from markdown, so the actual HTML it's dealing with looks like:

<p>
$$<br>
x+2<br>
$$
</p>

[edemaine]

The problem is with the <br>s, which splits the text elements into $$, x+2, $$ respectively. I imagine if you remove them, auto-render will work.

Ideally you can instead use a plugin that calls KaTeX during the Markdown process instead of afterwards. Which plugin depends on what Markdown parser you're using.

[frnsys]

Great, thank you, I'll look into that.