2.1.5 [DOM Level 2 - Style] Section 2.2.1, Override and computed style sheet
Interface ViewCSS (introduced in DOM Level 2) This interface represents a CSS view. The getComputedStyle method provides a read only access to the computed values of an element.
Quirks Mode, IE7 Mode, and IE8 Mode (All Versions)
The ViewCSS interface is not supported.
IE9 Mode, IE10 Mode, and IE11 Mode (All Versions)
The getComputedStyle method incorrectly returns
"0% 0%" when the style of the element to be computed has the value of
inherit for the background-position
Interface DocumentCSS (introduced in DOM Level 2) This interface represents a document with a CSS view.
All Document Modes (All Versions)
The DocumentCSS interface is not supported.