[whatwg] What is the purpose of timeupdate?

Simon Pieters simonp at opera.com
Fri Nov 6 03:16:06 PST 2009

On Fri, 06 Nov 2009 11:05:03 +0100, Robert O'Callahan  
<robert at ocallahan.org> wrote:

> On Fri, Nov 6, 2009 at 10:44 PM, Philip Jägenstedt  
> <philipj at opera.com>wrote:
>> We've considered firing it for each frame, but there is one problem. If
>> people expect that it fires once per frame they will probably write  
>> scripts
>> which do frame-based animations by moving things n pixels per frame or
>> similar. Some animations are just easier to do this way, so there's no
>> reason to think that people won't do it. This will break horribly if a
>> browser is ever forced to drop a frame, which is going to happen on  
>> slower
>> machines. In balance this may or may not be a risk worth taking.
> That's possible, but we haven't noticed authors doing that yet.


Simon Pieters
Opera Software

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