There is only one method im aware of to accomplish this but I dont think C2 has any ability to do this. The trick is to append a parameter/string to the file name in the script tag (assuming your hosting your files) and change it when you file changes.
The browser interprets the whole string as the file path even though what comes after the "?" are parameters. So next time you update your file just change the number in the script tag on your website (Example <script src="myfile.js?version=1.1"></script>) and each users browser will see the file has changed and grab a new copy.