datastar/site/static/md/examples/infinite_scroll.md

Infinite Scroll

Original HTMX Version

Explanation

The infinite scroll pattern provides a way to load content dynamically on user scrolling action.

Let’s focus on the final row (or the last element of your content):

<div
  data-intersects="$offset=0;$limit=10;@get('/examples/infinite_scroll/data')"
  id="more_btn"
>
  <div>Loading...</div>
</div>

This last element contains a listener which, when scrolled into view, will trigger a request. The result is then appended after it. The last element of the results will itself contain the listener to load the next page of results, and so on. data-intersects is a custom attribute that triggers a request when the element is scrolled into view. The offset and limit parameters are used to control the pagination of the results. The server sends back a new more_btn element with a new offset and the results to be appended.

event: datastar-merge-fragments
data: selector #more_btn
data: mergeMode morph
data: fragments <div data-intersects="$offset=10;$limit=10;@get('/examples/infinite_scroll/data')" id="more_btn"><div>Loading...</div></div>

event: datastar-merge-fragments
data: selector #click_to_load_rows
data: mergeMode append
data: fragments <tr id=\"agent_60\"><td>Agent Smith 3c</td><td>void61@null.org</td><td class=\"uppercase\">39b02fcf39c047c5</td></tr>"

....More rows to be appended

Demo

Don't scroll too far, there are consequences.