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I took that to mean scalability in the sense of UI complexity. Building something like some of the denser Yahoo pages in jQuery would be painful. However, most

I took that to mean scalability in the sense of UI complexity. Building something like some of the denser Yahoo pages in jQuery would be painful. However, most of the YUI-based stuff I've seen struck me as overly complex and slow and heavyweight, like Ext/JS. If you want to build something that looks and feels like a desktop app those libraries are probably the right choice but I almost always prefer something lighter and cleaner in a web UI.

kaylarose 16y ago
That's exactly my experience as well. I recently worked on two "enterprise rich web apps"(I hate that term) that were desktop-like. App A: the UI was mostly composed of HTML glued together with JQuery components, with a custom Model/Controller implementation (similar to Backbone.js) for the data. The view did have a lot of glue, but the data separation ended up a lot cleaner, and was easier for designers to maintain (HTML/CSS). App B: Was taken over from another team that used ExtJS. App B, had full UI without much effort, but ended up with a lot more cruft and direct view/model dependencies. Plus the ExtJS documentation is terrible.