Your answer doesn't appear to relate to what I asked. You need to know when to query the backend for more data if it's an infinite scrolling setup.

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jonah 2 days ago | parent [-]

Aahh. The way you phrased your question was pretty ambiguous.

The other posters have good answers. One thing to consider for a smooth interaction would be to eagerly load the next x elements before they scroll into view.

	▲	pcl 2 days ago \| parent [-]
		Yeah I’d assume you’d eagerly load enough to make sure everything gets at least partially into the viewport, and maybe a fee more to optimize for network latency. And then perhaps track elements whose trailing ends are not in the viewport, and load more once those become fully visible?