Regarding the implementation of a function to prevent screen capture

I am creating a website to sell digital products and am looking for a way to disable screen capturing and saving of product photos that are displayed as cover images when selling.

You just can’t. The user will always be able to take a screenshot with the operating system and that’s outside of the browser’s control.
Some alternative for your use case are: low resolutiom covers or watermarked covers

Thank you very much!
I see,
Do you know of a way or plugin to make the photo watermarked?