Bug 116645 – Need to update Page Visibility states

• Status: NEW
• Component: DOM

[Simon Fraser (smfr)]

WebKit currently has:
enum PageVisibilityState {
    PageVisibilityStateVisible,
    PageVisibilityStateHidden,
    PageVisibilityStatePrerender,
    PageVisibilityStatePreview
};

but the current spec lists:

On getting, visibilityState attribute MUST return one of the following DOMStrings or a vendor prefixed DOMString as defined in 4.5 Vendor Prefixes:

hidden,
visible,
prerender,
unloaded.

[Simon Fraser (smfr)]

"preview" was in
http://www.w3.org/TR/2011/WD-page-visibility-20110721/
but was replaced by "unloaded"  in http://www.w3.org/TR/2012/CR-page-visibility-20120726/