I think this is an excellent thorough presentation of WebComponents. One think I didn't quite understand was the first example about which it is said: "I have

I think this is an excellent thorough presentation of WebComponents. One think I didn't quite understand was the first example about which it is said: "I have created a web component which lazily loads an image once it is fully visible in the browser's viewport" Once the image is "fully visible", what's the point of "loading it"? Doesn't it go the other way first you load it then it becomes visible?