Re: Mutation events replacement

On Fri, Jul 8, 2011 at 5:21 AM, Sean Hogan <> wrote:
> - MathJax ( 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).

It seems like all 3 use cases here can be implemented by observers that are
called AFTER the fact, and do not requiere any events or callbacks before

- Ryosuke

Received on Friday, 8 July 2011 15:13:39 UTC