[css-scroll-snap-2] Should snap events fired at the document bubble?

[DavMila]

The scroll-snap-2 spec says that snap events ("snapchanged" & "snapchanging") should not bubble.

For snap events targeted at the document, this diverges from the behavior specified for scroll events which should bubble when targeted at the document. I believe the effect of bubbling when targeted at the document is that scroll events can also be listened to on the window.

Making snap events behave consistently with scroll events in this regard may be closer to developers' expectations since it is not uncommon for developers to listen for scrolls on a page via

window.addEventListener("scroll", () => {/* Do Stuff.*/}) or window.onscroll = () => {/* Do Stuff. */}

A developer might expect to be able to write

window.addEventListener("snapchanged", () => {/* Do Stuff.*/})

just as they would

document.addEventListener("snapchanged", () => {/* Do Stuff.*/})

[flackr]

Adding to the agenda to confirm whether we want to align with scroll events or deviate here.

[css-meeting-bot]

The CSS Working Group just discussed [css-scroll-snap-2] Should snap events fired at the document bubble?, and agreed to the following:

• RESOLVED: snap events targeting the document bubble in the same way scroll events do

The full IRC log of that discussion

<fantasai> flackr: Snap events are very similar to scroll events in how dev thinks about them and how dispatched
<fantasai> flackr: scroll events, when targetting the document, ?? window
<fantasai> flackr: should we do the same with snap events? I propose yes
<fantasai> florian: My intuition is the same. Is there any, even theoretical, counter-argument? Why would anyone want different?
<fantasai> florian: if we can't think of any plausible reason, then we have a resolution :)
<fantasai> Rossen: Objections?
<kbabbitt> +1
<TabAtkins> +1, this just seems straightforward
<flackr> Proposal: snap events targeting the document bubble in the same way scroll events do
<fantasai> RESOLVED: snap events targeting the document bubble in the same way scroll events do