Unobtrusive use of Javascript is a very neat one in my opinion. You seperate the content and structure from the presentation layer. In practice though, many si

Unobtrusive use of Javascript is a very neat one in my opinion. You seperate the content and structure from the presentation layer. In practice though, many sites main functions depend on JS. I can imagine that for large projects the costs of optimizing the view of your site without JS can become too large.