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If you do not want to change the code for your webpage. You can simply open developer tools on Google Chrome. Shortcut: Ctrl+Shift+i on windows.
You'll find a gear on the bottom-right corner that'll take you to settings. Check "disable cache" and you're good to go.
I do this myself for development. I use CTRL-F5. Its like a force refresh. This refreshes the page including re-downloading any referenced JS files or CSS files even if they were cached.