satyen desai talking about YUI 3 arch concepts & lessons learned

meetup: http://www.meetup.com/BayJax/calendar/10852424/

Satyen Desai talking about YUI 3 arch concepts & lessons learned

– motivation

— yui2 is mature, why change it?

— lighter 

— allow fine-grained include control

— rethink the way we use code: move away from traditional inheritance model towards js augmentation & mixins

— make it easier

— yui2 has four different widget api classes; yui3 has a single, standard api

— make common actions easier

—- iteration

—- chaining

— runtime performance, ie make it faster

— yui2 has always used a good namespace

— yui3 takes namespacing further by giving you instance-level control

-examples

— self-populating

— yui3 pulls down dependencies in an optimized way

—- no more file-order concerns

— yui3 offers protection

— each instance is sandboxed and pulls in its dependencies indeendant of other instances

— self-populating

— naturally creates anonymous function wrappers

— code re-use

— yui3 avoids the kitchen sink by breaking libs into sub-modules and allowing the developer to only load the submodules required

– plugins and examples

— in yui2, all instances of a class contain the kitchen sink

— in yui3, we can use and extend at the sub-module-level

– events

— built from decoupled code

— event facades wrap events in a consistent, normalized interface

— facedes wrap custom events as well

— on and after events are built into the event publisher

— bubbling

— yui3 affords more control over the event stack

— detaching listeners

– node facade

— a single location for wrking w/ anything html related

— enhances and normalizes

— yui3 build utils into the facade as opposed to yui2’s library-based orientation

— extendable

— we can attach plug-ins to a node, eg an io object

— iterationa and batch operations are suported

– core lang convneineces

— isType methods

– questions

— cross domain?

— managed via flash object

— multiple versions?

— the last version loaded is the current version available

— what does yui3 do better than other libs?

— yui3 excels in readability and maintainablility

— can yui3 be used on top of yui2?

— currently, you can use both on a page, but not necessarily build one on the other

– this talk is available online: http://developer.yahoo.com/yui/theater/