CSSStyleSheet API

Sheet API.idl

dictionary CSSStyleSheetInit {
  // TODO: Should also take a MediaList, but those have no constructor. When
  // it does take those, it should make a copy so mutations to the list don't
  // impact the sheet. This is for v2 of the API.
  DOMString media = "";
  DOMString title = "";
  boolean alternate = false;
  boolean disabled = false;
};

// When invoked parses the sheet using the current context document for
// state, that is quirks or standards mode, case conversion (html vs xml),
// url resolution, etc.
// TODO: Should we allow passing a different document in options?
[Constructor(DOMString text, CSSStyleSheetInit? options)]
partial interface CSSStyleSheet {
    // Does a deep clone of all rules and the MediaList.
    //
    // Blink implementation note: Internally this just shares the
    // StyleSheetContents and forces a copy on write for any mutations of the
    // sheet.
    CSSStyleSheet clone();
};

interface CSSStyleSheetSet {
    // When adding a sheet the ownerNode of the sheet becomes the document or
    // the ShadowRoot.
    setlike<CSSStyleSheet>;
};

[NoInterfaceObject]
interface TreeScope {
    CSSStyleSheetSet scopedSheets;
};

Document implements TreeScope;
ShadowRoot implements TreeScope;

// StyleSheet can have an ownerNode of a Document or a ShadowRoot.
partial interface StyleSheet {
  readonly attribute (Element or ProcessingInstruction or Document or ShadowRoot)? ownerNode;
};