[whatwg] api for fullscreen()

Robert O'Callahan robert at ocallahan.org
Mon Feb 1 11:05:23 PST 2010

On Tue, Feb 2, 2010 at 7:39 AM, Kenneth Russell <kbr at google.com> wrote:

> When you say that the DOM viewport of the element is aligned with the
> screen when it goes fullscreen, does that mean that the .width and
> .height properties are changed? Or does it mean that the element's
> size is changed by a CSS style?

The latter. The window's viewport is aligned with the screen bounds, and by
default the element is styled with position:fixed; left:0; right:0; top:0;
bottom:0, which resizes it in CSS to fill the viewport.

The case I'm thinking about is when a Canvas element is taken
> fullscreen; on that element changing the .width and .height properties
> changes the size of the backing store, but applying a CSS style to
> change its width and height causes the backing store to be scaled to
> fit. The desired behavior is for the backing store to be resized.

The author would have to handle the beginfullscreen event and manually set
the canvas width/height attributes, e.g. to
getBoundingClientRect().width/height. I don't think we should change
width/height attributes automatically, since that has the side effect of
clearing the canvas.

"He was pierced for our transgressions, he was crushed for our iniquities;
the punishment that brought us peace was upon him, and by his wounds we are
healed. We all, like sheep, have gone astray, each of us has turned to his
own way; and the LORD has laid on him the iniquity of us all." [Isaiah
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