HTML streaming, does the property apply after the html streaming is complete or during?

[argyleink]

maybe @flackr can help me articulate this 🙂

[flackr]

When you load a page, the content streams in and the browser can perform multiple render passes. If in its initial render pass there is no scroll-start-target, but eventually after some more loading an element with scroll-start-target: auto appears, do we then scroll to the element? I assume yes we would want to scroll in this case since the only reason it wasn't present in the initial style / layout was it hadn't loaded yet.

Then what if we have a page that has fully loaded and we add a scroll-start-target: auto element to a scroller? Presumably we don't want to scroll to the element in this case as the scroll-start-target wasn't there originally. Arguably a site which fetches some content containing a scroll-start-target could want this, but it seems like an anti-pattern for scroll stability.

I think in the current spec it isn't clear exactly when we would consider new scroll-start-target elements, but we should define when it takes effect such that it has the behavior we expect.

[argyleink]

ty, much clearer!