How do I change a filename on-download with javascript?

Question

The script adds a download link for videos (on a specific site). How do I change the filename to something else while downloading?

Example URL:
\"http://websit         


        

Answer 1

Just in case you are looking for such a solution for your nasty downloading chrome extension, you should look into chrome.downloads API, it needs additional permission ('downloads') and allows you to specify filename. https://developer.chrome.com/extensions/downloads

However there is a problem I'm facing right now. The chrome extension I'm refactoring has 600k+ user base and adding a new permission would disable the extension for all of them. So it is no-go solution for me, but if you are developing a new extension you definitely should use it.