i absolutely hate how the modern web just fails to load if one has javascript turned off. i, as a user, should be able to switch off javascript and have the site work exactly as it does with javascript turned on. it’s not a hard concept, people.
but you ask candidates to explain “graceful degradation” and they’ll sit and look at you with a blank stare.
file uploads and forms are the easiest to do server side
Not if you want them to be at least halfway user friendly. Form validation is terrible when done completely server side, and several input elements like multiselect dropdowns, comboboxes and searchfields won’t work at all unless supported by client side JavaScript. And have you ever tried to do file previews and upload progress bars purly serverside?
So I guess by fileupload you mean “drop file here and wait an uncertain amount of time for the server to handle the file without any feedback whatsoever.” and by forms you mean “enter your data here, then click submit and if we feel charitable we may reward you with a long list of errors you made. Some of which could have been avoided if you knew about them while filling in previous fields”.
It depends on the type of input validation you’re doing, a bunch of it is built into the browser and you don’t need JS for it.
It depends on what you are doing