Comment by XLcommerce

That's an important question to answer. Creating a site that works sans js then layering on js is great, but it does entail duplication of effort, a larger testing burden etc. It's important to work out if the ROI for going the extra mile makes good business sense. Especially given the (excellent) point the original post makes: if a user has turned off js then if your app is worth their time they'll find the js switch again without difficulties.