How to detect if JavaScript is disabled?

Question

There was a post this morning asking about how many people disable JavaScript. Then I began to wonder what techniques might be used to determine if the user has it disabled.

Answer 1

I'd suggest you go the other way around by writing unobtrusive JavaScript.

Make the features of your project work for users with JavaScript disabled, and when you're done, implement your JavaScript UI-enhancements.

https://en.wikipedia.org/wiki/Unobtrusive_JavaScript