Fun stuff!

The underlying `swtl` library is itself pretty interesting.

Note the use of `delayed(...)` in the blog's example code: a promise in a tagged template.

SWTL's `html` allows for this (I think the blog's example follows the simple case here https://github.com/thepassle/swtl/blob/main/html.js#L23). And SWTL's `render` method races the promises (https://github.com/thepassle/swtl/blob/main/render.js#L120) outward.