W3C home > Mailing lists > Public > www-style@w3.org > September 2015

Re: Proposal for a "duration" meta-property(?) on a css class

From: Tab Atkins Jr. <jackalmage@gmail.com>
Date: Wed, 30 Sep 2015 11:42:48 -0700
Message-ID: <CAAWBYDDGeZwErWrnt6P4++kjv0Xd7=FgynviQbbj1-NbLJ-JfQ@mail.gmail.com>
To: Xidorn Quan <quanxunzhen@gmail.com>
Cc: George Triantafyllakos <gtrianta@gmail.com>, www-style list <www-style@w3.org>
On Wed, Sep 30, 2015 at 7:01 AM, Xidorn Quan <quanxunzhen@gmail.com> wrote:
> Your usecase has already been covered by CSS animation.
> So, for your specific case, you can do this:
> @keyframes show-a-while {
>   0% { visibility: visible; }
>   100% { visibility: hidden; }
> }
> .visible {
>   animation: show-a-while 1s step-end;
>   visibility: hidden;
> }
> Note that you need to use script to remove the class anyway, since CSS
> can never change the content of the HTML document.

Yup, what Xidorn said.  CSS *cannot* modify the original page; it
can't change what classes an element has, etc.  It just dictates how
to transform the DOM into a visual representation.

But yeah, animations can be used to address your use-case and similar
ones.  An animation's timeline starts when the property applying it is
first applied, so you can make something visible/invisible with any of
the appropriate properties (display, visibility, opacity, etc) at
whatever time you wish.

Received on Wednesday, 30 September 2015 18:43:35 UTC

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