[simonw]

shot-scraper has a feature that's meant to help with this: you can inject additional al JavaScript into the page that can then act before the screenshot is taken.

I use that for things like accepting cookie banners, but using it to scroll down to trigger additional loading should work too.

There's also a --wait-for option which takes a JavaScript expression and polls until it's true before taking the shot - useful for if there's custom loading behavior you need to wait for.

Documentation here: https://shot-scraper.datasette.io/en/stable/screenshots.html