Slight aside, most payment services with a Stipe like js self hosted checkout now suggest you include their JavaScript on all pages off your site, not just the

Slight aside, most payment services with a Stipe like js self hosted checkout now suggest you include their JavaScript on all pages off your site, not just the checkout. This is so that they can begin to build a profile of how the user/browser moves around the site in order to use ML to prevent fraud. They also require that you dont self host the js. The main use of this is to detect automated scripts running cards on your site to test if they work. Obviously it’s an endless battle as the fraudsters move to using tools such as puppeteer/playwright to simulate a human using a browser.