Some lines not rendering

[henrisuurorg]

Vertical and horizontal lines are not rendering in fractions and some other elements. I attached screenshots of what's showing up when I try to render the following latex.

<Latex displayMode={true}>{String.raw`$$\cfrac{a}{1 + \cfrac{1}{b}}$$`}</Latex>

What's rendering:

What should be rendered:

       <Latex displayMode={true}>{String.raw`$$ \def\arraystretch{1.5}
   \begin{array}{c:c:c}
   a & b & c \\ \hline
   d & e & f \\
   \hdashline
   g & h & i
\end{array} $$`}</Latex>

What's rendering:

What should be rendered:

[spondiirty]

+1
fraction ( \frac{a}{b}) line is also missing.

[spondiirty]

@henrisuurorg
need to include relative script in your header.

<!-- The loading of KaTeX is deferred to speed up page rendering -->
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/katex.min.js" crossorigin="anonymous"></script>

<!-- To automatically render math in text elements, include the auto-render extension: -->
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/contrib/auto-render.min.js" crossorigin="anonymous"
          onload="renderMathInElement(document.body);"></script>

[henrisuurorg]

need to include relative script in your header.

<!-- The loading of KaTeX is deferred to speed up page rendering -->
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/katex.min.js" crossorigin="anonymous"></script>

<!-- To automatically render math in text elements, include the auto-render extension: -->
<script defer src="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/contrib/auto-render.min.js" crossorigin="anonymous"
          onload="renderMathInElement(document.body);"></script>

@spondiirty
This doesn't seem to change anything for me. Did you include the relative script in the header of your index.html file or am I doing something wrong?

[spondiirty]

@henrisuurorg
yea, I put them in the header of index.html file

  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/katex.min.css"
        integrity="sha384-zB1R0rpPzHqg7Kpt0Aljp8JPLqbXI3bhnPWROx27a9N0Ll6ZP/+DiW/UqRcLbRjq" crossorigin="anonymous">

  <!-- The loading of KaTeX is deferred to speed up page rendering -->
  <script defer src="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/katex.min.js" crossorigin="anonymous"></script>

but that only works for my cases (fraction). I tested your case just now, seems only some of the lines are rendering, and it changes behavior when changing the page layout.

screenshot:

[henrisuurorg]

@spondiirty
Your solution got fractions working for me and that was my main issue so thanks for that! However, I won't close the issue until I get an official response.