A little more overview about ajax now, with some international ajax showcases.
My notes:
- ajax is not specially with xml and javascript is not a must - ajax = dhtml + xhr - invented by microsoft - in ie since 1997 - transport: html, xml, json, js or anything else willing to parse - Example gmail - ui, chat, autosave, login with ajax - ie login - first gzipped source of 153k! - complete addressbook of ~ 350k, not zipped - Example google calendar - ie quick add - Example google suggest - search term completion - Example ajax login - username pw verification ad hoc - ev. confusing - Example google spreasheet - ie concurrent users - polling for changes to serverfarm at google without ajax! - Where is ajax reasonable? - form validations - spellchecking as you type - auto-completion for very large sets only - tree navigations (big ones) - What to remember - back button must work us usual (web 1.0) - accessibility (non-js, ...) - indexing - bookmarks - networking traffic (keepalive, gzip, ...)
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