Re: [spec-reviews] CSSOM View document.scrollingElement (#51)

@RByers Again, I'm a layman, so please just take my comments as feedback. I've also been trying to solve this problem for a while on behalf of jQuery, and this is as close as we've ever gotten to a solution....

what about a boolean property rather than an additional reference to document.documentElement? I think @domenic and my (layman) main objection is about yet another property referring to the same underlying element. Perhaps `document.documentElement.isScrollingElement`?

This would look like:

```
function getScrollingElement() {
    if (document.documentElement.isScrollingElement) {
        return document.documentElement;
    }
    return /* whatever UA check they use now */;
}
```

You'd also have the benefit of querying an element to see if it is the scrolling element without having to compare it to another element:

```
function isScrollingElement(element) {
  if ("isScrollingElement" in element) {
    return element.isScrollingElement;
  }
  return /*some UA check */;
}
```

---
Reply to this email directly or view it on GitHub:
https://github.com/w3ctag/spec-reviews/issues/51#issuecomment-95722694