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Re: Suggestion: Element.scrollParent

From: Mark <mark@heyimmark.com>
Date: Fri, 30 Jun 2017 11:13:26 +0000
Message-ID: <CAFfkm=KiQPPbW18hMx_=5nZEBZON4+8J6dDU2onmzAr23gnzRA@mail.gmail.com>
To: Ori Adam <oria@blossom-kc.com>
Cc: www-dom@w3.org
Hmmm… sticky positioning can be done by setting the element’s position
property to sticky in CSS
<https://developer.mozilla.org/en-US/docs/Web/CSS/position>. All of your
other examples can be done with IntersectionObserver API
<https://wicg.github.io/IntersectionObserver/>. Both can be used in
browsers today.

On Thu, Jun 29, 2017 at 10:31 AM Ori Adam <oria@blossom-kc.com> wrote:

> Just noticed that I haven't answered. Sorry for the delay
> Use cases are when an element needs to be scroll-aware, and the container
> can be many different elements.
> Some examples:
> - Sticky positioning
> - Load sub elements when element becomes visible in scroll
> - Animate element when visible in scroll
> - Pause animations when element is out of sight
> - Do something when scrolling to bottom
> scrollParents array for nested scroll-enabled containers might be useful
> as well, tough it can be easily achieved by recursively calling
> scrollParent.scrollParent.scrollParent...
> I prepared one example for a use of scrollParent:
> https://jsfiddle.net/oriadam/n53asLs2
> On Mon, Jun 12, 2017 at 4:41 PM, Mark <mark@heyimmark.com> wrote:
>> Sounds like a cool feature. What are the use-cases? I'm genuinely curious
>> as I've never came across a situation where I've needed this. Are there not
>> any cases where there may be two parents in the hierarchy and you don't
>> want the closest, but the one after it? Also, a more specific name would be
>> better like "closestScrollParent" or similar. "scrollParent" is vague since
>> there could be multiple "scrollParent"s technically.
>> On Mon, Jun 12, 2017 at 8:14 AM Ori Adam <oria@blossom-kc.com> wrote:
>>> Suggestion: Element.scrollParent
>>> Returns the closest element which controls the position of current
>>> element with a scroll.
>>> This feature very useful in many cases, easy for browsers to implement
>>> and hard for plugins such as jQueryUI to get it right.
>>> Thanks
Received on Friday, 30 June 2017 11:14:11 UTC

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