I believe appending a version number to a JS file allows me to change that version number to guarantee a user isn't viewing an old, cached version of the file.
But what is best?
Obviously (2) needs the filename changing, but looking at it, does (1) work? I'm 100% that (2) would work.
Are there any other downfalls of either of the methods? What do other people use?
I need to be 100% certain that changing the version number will ensure nobody gets an old file.