#import // https://drafts.csswg.org/cssom/#cssstyledeclaration [Exposed=Window] interface CSSStyleDeclaration { [CEReactions] attribute CSSOMString cssText; readonly attribute unsigned long length; getter CSSOMString item(unsigned long index); CSSOMString getPropertyValue(CSSOMString property); CSSOMString getPropertyPriority(CSSOMString property); [CEReactions] undefined setProperty(CSSOMString property, [LegacyNullToEmptyString] CSSOMString value, optional [LegacyNullToEmptyString] CSSOMString priority = ""); [CEReactions] CSSOMString removeProperty(CSSOMString property); readonly attribute CSSRule? parentRule; [CEReactions, LegacyNullToEmptyString] attribute CSSOMString cssFloat; }; CSSStyleDeclaration includes GeneratedCSSStyleProperties;