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[csswg-drafts] Clarify scrollTop/scrollLeft behavior for ongoing smooth scrolls. (#5679)

From: Mathieu Binette via GitHub <sysbot+gh@w3.org>
Date: Wed, 28 Oct 2020 22:29:29 +0000
To: public-css-archive@w3.org
Message-ID: <issues.opened-731833678-1603924168-sysbot+gh@w3.org>
mbinette91 has just created a new issue for https://github.com/w3c/csswg-drafts:

== Clarify scrollTop/scrollLeft behavior for ongoing smooth scrolls. ==

About that line specifically:
> Abort any ongoing smooth scroll for box.

Makes sense when setting a 2D position through scrollTo & scrollIntoView, but not as much when setting scrollLeft/Top properties, which most people (and browsers today) would assume to be independent properties.

Specifically, should these two blocks of code behave differently when smooth-scrolling is on than if it isn't:
    element.scrollLeft = x;
    element.scrollTop = y;

    element.scrollTop = y;
    element.scrollLeft = x;

Reference mozilla bug where there are questions on the spec: https://bugzilla.mozilla.org/show_bug.cgi?id=1671283

Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/5679 using your GitHub account

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