This helped me with a 'visual' understanding of what's happening, go to view-source:https://ooo.lamplightdev.workers.dev/ https://ooo.lamplightdev.workers.dev/

This helped me with a 'visual' understanding of what's happening, go to view-source:https://ooo.lamplightdev.workers.dev/ https://ooo.lamplightdev.workers.dev/ then watch the bottom of the page as the new `<span slot=...>` elements come in. As they come in, the browser's, well, slotting the contents into the corresponding slot in the template.