Rendering in Ximera can be broken down into three parts:

Rendering text

is handled using the LaTeX package TeX4ht.

Rendering math

is handled using MathJax via TeX4ht.

Rendering images

is done by directly showing the image (in the case of a PNG or JPG) or converting to SVG and displaying the SVG.

1 Basics of rendering

There are issues with variables like “textwidth” versus “pagewidth” used in LaTeX. For online rendering, these variables are all basically made to be the width of the browser window (more or less—there are some very technical details here). This can make it difficult to horizontally align things with any subtlety.

2 Accessibility

MathJax has extensive accessibility features built in, which means Ximera benefits from the developers keeping this up-to-date and conforming to industry standard. In essence, you don’t need to worry about accessibility features for rendered math content—with the exception of graphs.

Due to how graphs are rendered, they currently don’t have any accessibility features (e.g. alt-text) if you provide them via TikZ or other LaTeX means. You can input them as image files instead, however those also lack any accessibility support. This is something to keep in mind, as you may need to provide textual description explicitly for things like screen readers to provide more accessibility for graphs and/or images.