Earlier quoted context omitted.
Because after you hover on something, it can be an indication of intent. Just loading an image when the webpage loads doesn't give you any insight into what the user 'interacted' with.
> Because after you hover on something, it can be an indication of intent. Yes, that's (one of the many reasons) why javascript needs to die. > Just loading an image when the webpage loads doesn't give you any insight into what the user 'interacted' with. That's what I said: regardless of whether the browser, when loading a page, does or does not include hidden images in what it fetches, that cannot possibly tell you…
> Yes, that's (one of the many reasons) why javascript needs to die.
You're missing the point. CSS allows you to load tracking pixels on hover, so you can do that without Javascript.