An interactive chart

Inline math like $e^{i\pi} + 1 = 0$ and display math both work:

\int_{-\infty}^{\infty} e^{-x^2}\,dx = \sqrt{\pi}

And here is a chart you can hover, zoom, and pan. It is a normal component call inside the Markdown — the data is just a JavaScript literal:

To use another library (D3, three.js, Observable Plot), npm install it and write a component the same way: server-render a container, hydrate it in a <script>.