Comment by danpeddle

Very neat, and seconding impression of reminding of observable, but much more freeform. Here's a dumb little demo of appending some divs to a dom element, with random heights.

https://natto.dev/@dazld/7168773775bd401481366b7d62d14e8c

It's quite fun to think about the restrictions of this - getting an animation loop going, for example.