Constructed stylesheetsThe CSSStyleSheet constructor creates a new stylesheet which can be shared between a document and multiple shadow roots using adoptedStyleSheets.widely2023-03-272025-09-27https://drafts.csswg.org/cssom-1/#dom-cssstylesheet-cssstylesheethttps://drafts.csswg.org/cssom-1/#dom-documentorshadowroot-adoptedstylesheetshttps://developer.mozilla.org/docs/Web/API/CSSStyleSheet/replaceapi.CSSStyleSheet.CSSStyleSheetapi.CSSStyleSheet.CSSStyleSheet.options_baseURL_parameterapi.CSSStyleSheet.replaceapi.CSSStyleSheet.replaceSyncapi.Document.adoptedStyleSheetsapi.ShadowRoot.adoptedStyleSheetshttps://nowyoucanuse.com/features--constructed-stylesheets.html