When I load a script with .getScript('file.js') is there a way to do remove that script later? sort of like a clean where I say delete the js I loaded earlier
getScript doesn't "load" a script in the sense of keeping it around; it downloads the script from the server and runs it immediately. So there's no need to remove it.
However, any DOM objects that the script creates, or functions it defines, etc., will continue to exist. Removing these will require knowing specifically what they are; probably your best bet is to have your script define a function that deletes all of the things that the rest of the script creates.
Unfortunately once the code has been executed you can't unexecute it.
However, if file.js creates DOM objects, you can delete those via delete object.name, and if you're bind()ing events you can always unbind() them.
来源：https://stackoverflow.com/questions/5108002/how-to-delete-script-loaded-by-getscript