Most should work without JS (and also without CSS too, usually), yes.
Even in the few cases where it is needed, it should be designed to work OK without. I did see once where if JavaScript was disabled, it displayed a link to documentation instead; that is a good idea. (Unfortunately, the documentation didn't work without JavaScript enabled; they should fix that.) If it is accessing data, you can link to the documentation and/or to the data directly, in order to deal with it by yourself, with your own software, if the user wishes to do so. Sometimes the script is used to perform calculations, or automatically convert or render something; you can still add a <noscript> block to just mention what it is, links to source codes, or in some cases (e.g. automatic time zone conversion) just omit that part entirely will do. Simply writing "This page requires JavaScript enabled to work" is worthless; don't do that.