[deno]

I think following progressive enchancement paradigm in your website for the sole purpose of including a marginal percentege of users is—just like supporting IE6—not really worth your time. If you can, however, do that, than it's a great strategy to make sure that all of your content will be indexable. I think google had some proposal for server parsing #anchor%20urls for visiting spiders, but I had never understood how was that supposed to reduce complexity. Meanwhile if your project is not a ginormous behemot, following Progressive Enchancement in addition to mentioned SEO benefits can help you to ensure for example that you validate all your input on server side etc. As long as it makes sense, just like TDD. But to prevent “before-Javascript-is-downloaded code path” scenario all you need to do is to include your <script/> tags in head section. One exception would be if user's browser time-outs or encounters error when requesting your script. But that's very, very unlikely. Just make sure you don't name your javascript files “free_porn_sex.js.”