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Re: Mutation events replacement

From: Jonas Sicking <jonas@sicking.cc>
Date: Fri, 8 Jul 2011 09:27:20 -0700
Message-ID: <CA+c2ei8PxtS7SwqoEePxzsKpPWsPjAALmotJihh8ELZBfr58xA@mail.gmail.com>
To: Sean Hogan <shogun70@westnet.com.au>
Cc: John J Barton <johnjbarton@johnjbarton.com>, Olli@pettay.fi, Rafael Weinstein <rafaelw@google.com>, Aryeh Gregor <Simetrical+w3c@gmail.com>, Adam Klein <adamk@google.com>, Anne van Kesteren <annevk@opera.com>, Webapps WG <public-webapps@w3.org>
On Fri, Jul 8, 2011 at 5:21 AM, Sean Hogan <shogun70@westnet.com.au> wrote:
> On 8/07/11 8:28 AM, Jonas Sicking wrote:
>> On Thu, Jul 7, 2011 at 3:21 PM, John J Barton
>> <johnjbarton@johnjbarton.com>  wrote:
>>> Jonas Sicking wrote:
>>>>  We are definitely
>>>> short on use cases for mutation events in general which is a problem.
>>> 3. Client side dynamic translation. Intercept mutations and replace or
>>> extend them. This could be for user tools like scriptish or stylish, dev
>>> tools to inject marks or code, or for re-engineering complex sites for
>>> newer
>>> browser features.
>> I don't fully understand this. Can you give more concrete examples?
> - MathJax (http://mathjax.org) is a JS lib that facilitates putting math
> onto the web by converting LaTeX or MathML markup in a page to HTML. By
> default MathJax triggers off the onload event to run this conversion on the
> page. When content containing math is dynamically added to the page, MathJax
> must be called manually to convert the new content. A DOM insertion listener
> could potentially be used to handle this conversion automatically.
> - A similar use-case is element augmentation too complex for CSS :before and
> :after
> - ARIA support in JS libs currently involves updating aria-attributes to be
> appropriate to behavior the lib is implementing. Attribute mutation
> listeners would allow an inverse approach - behaviors being triggered off
> changes to aria-attributes.
> - DOM insertion and removal listeners could facilitate the implementation of
> automatically updating Table-of-* (Headings / Images / etc).

Do any of these require synchronous callbacks? Do any of these use
mutation events today?

/ Jonas
Received on Friday, 8 July 2011 16:28:18 UTC

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