{
 "compat_features": [
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  "api.CSSStyleSheet.CSSStyleSheet.options_baseURL_parameter",
  "api.CSSStyleSheet.replace",
  "api.CSSStyleSheet.replaceSync",
  "api.Document.adoptedStyleSheets",
  "api.ShadowRoot.adoptedStyleSheets"
 ],
 "description": "The CSSStyleSheet constructor creates a new stylesheet which can be shared between a document and multiple shadow roots using adoptedStyleSheets.",
 "description_html": "The <code>CSSStyleSheet</code> constructor creates a new stylesheet which can be shared between a document and multiple shadow roots using <code>adoptedStyleSheets</code>.",
 "kind": "feature",
 "name": "Constructed stylesheets",
 "spec": [
  "https://drafts.csswg.org/cssom-1/#dom-cssstylesheet-cssstylesheet",
  "https://drafts.csswg.org/cssom-1/#dom-documentorshadowroot-adoptedstylesheets"
 ],
 "status": {
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  "baseline_high_date": "2025-09-27",
  "baseline_low_date": "2023-03-27",
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    "baseline_high_date": "2025-09-27",
    "baseline_low_date": "2023-03-27",
    "support": {
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     "chrome_android": "73",
     "edge": "79",
     "firefox": "101",
     "firefox_android": "101",
     "safari": "16.4",
     "safari_ios": "16.4"
    }
   },
   "api.CSSStyleSheet.CSSStyleSheet.options_baseURL_parameter": {
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    "support": {
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     "firefox_android": "101",
     "safari": "16.4",
     "safari_ios": "16.4"
    }
   },
   "api.CSSStyleSheet.replace": {
    "baseline": "high",
    "baseline_high_date": "2025-09-27",
    "baseline_low_date": "2023-03-27",
    "support": {
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     "chrome_android": "73",
     "edge": "79",
     "firefox": "101",
     "firefox_android": "101",
     "safari": "16.4",
     "safari_ios": "16.4"
    }
   },
   "api.CSSStyleSheet.replaceSync": {
    "baseline": "high",
    "baseline_high_date": "2025-09-27",
    "baseline_low_date": "2023-03-27",
    "support": {
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     "chrome_android": "73",
     "edge": "79",
     "firefox": "101",
     "firefox_android": "101",
     "safari": "16.4",
     "safari_ios": "16.4"
    }
   },
   "api.Document.adoptedStyleSheets": {
    "baseline": "high",
    "baseline_high_date": "2025-09-27",
    "baseline_low_date": "2023-03-27",
    "support": {
     "chrome": "73",
     "chrome_android": "73",
     "edge": "79",
     "firefox": "101",
     "firefox_android": "101",
     "safari": "16.4",
     "safari_ios": "16.4"
    }
   },
   "api.ShadowRoot.adoptedStyleSheets": {
    "baseline": "high",
    "baseline_high_date": "2025-09-27",
    "baseline_low_date": "2023-03-27",
    "support": {
     "chrome": "73",
     "chrome_android": "73",
     "edge": "79",
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     "firefox_android": "101",
     "safari": "16.4",
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    }
   }
  },
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   "chrome_android": "73",
   "edge": "79",
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   "firefox_android": "101",
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   "safari_ios": "16.4"
  }
 },
 "id": "constructed-stylesheets",
 "groups": [],
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   "url": "https://drafts.csswg.org/cssom-1/#dom-cssstylesheet-cssstylesheet",
   "seriesComposition": "full",
   "shortname": "cssom-1",
   "series": {
    "shortname": "cssom",
    "currentSpecification": "cssom-1",
    "title": "CSS Object Model (CSSOM)",
    "shortTitle": "CSSOM",
    "releaseUrl": "https://www.w3.org/TR/cssom/",
    "nightlyUrl": "https://drafts.csswg.org/cssom/"
   },
   "seriesVersion": "1",
   "organization": "W3C",
   "groups": [
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     "name": "Cascading Style Sheets (CSS) Working Group",
     "url": "https://www.w3.org/groups/wg/css/"
    }
   ],
   "release": {
    "url": "https://www.w3.org/TR/cssom-1/",
    "status": "Working Draft",
    "filename": "Overview.html"
   },
   "nightly": {
    "url": "https://drafts.csswg.org/cssom-1/",
    "status": "Editor's Draft",
    "alternateUrls": [
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     "https://w3c.github.io/csswg-drafts/cssom/"
    ],
    "repository": "https://github.com/w3c/csswg-drafts",
    "sourcePath": "cssom-1/Overview.bs",
    "filename": "index.html"
   },
   "title": "CSS Object Model (CSSOM)",
   "source": "w3c",
   "shortTitle": "CSSOM",
   "categories": [
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   ],
   "standing": "good",
   "tests": {
    "repository": "https://github.com/web-platform-tests/wpt",
    "testPaths": [
     "css/cssom"
    ]
   },
   "fragment": "dom-cssstylesheet-cssstylesheet"
  },
  {
   "url": "https://drafts.csswg.org/cssom-1/#dom-documentorshadowroot-adoptedstylesheets",
   "seriesComposition": "full",
   "shortname": "cssom-1",
   "series": {
    "shortname": "cssom",
    "currentSpecification": "cssom-1",
    "title": "CSS Object Model (CSSOM)",
    "shortTitle": "CSSOM",
    "releaseUrl": "https://www.w3.org/TR/cssom/",
    "nightlyUrl": "https://drafts.csswg.org/cssom/"
   },
   "seriesVersion": "1",
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     "name": "Cascading Style Sheets (CSS) Working Group",
     "url": "https://www.w3.org/groups/wg/css/"
    }
   ],
   "release": {
    "url": "https://www.w3.org/TR/cssom-1/",
    "status": "Working Draft",
    "filename": "Overview.html"
   },
   "nightly": {
    "url": "https://drafts.csswg.org/cssom-1/",
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    "alternateUrls": [
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     "https://w3c.github.io/csswg-drafts/cssom/"
    ],
    "repository": "https://github.com/w3c/csswg-drafts",
    "sourcePath": "cssom-1/Overview.bs",
    "filename": "index.html"
   },
   "title": "CSS Object Model (CSSOM)",
   "source": "w3c",
   "shortTitle": "CSSOM",
   "categories": [
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   ],
   "standing": "good",
   "tests": {
    "repository": "https://github.com/web-platform-tests/wpt",
    "testPaths": [
     "css/cssom"
    ]
   },
   "fragment": "dom-documentorshadowroot-adoptedstylesheets"
  }
 ],
 "mdnUrls": [
  {
   "slug": "Web/API/Document/adoptedStyleSheets",
   "title": "Document: adoptedStyleSheets property",
   "anchor": null,
   "url": "https://developer.mozilla.org/docs/Web/API/Document/adoptedStyleSheets"
  }
 ],
 "standardPositions": [
  {
   "vendor": "mozilla",
   "url": "https://github.com/mozilla/standards-positions/issues/103",
   "position": "positive",
   "concerns": []
  },
  {
   "vendor": "apple",
   "url": "https://github.com/WebKit/standards-positions/issues/42",
   "position": "support",
   "concerns": [
    "interoperability"
   ]
  }
 ],
 "hasNegativeStandardPosition": false,
 "stateOfSurveys": [],
 "chromeUseCounters": {
  "percentageOfPageLoad": 0.10319654,
  "url": "https://chromestatus.com/metrics/webfeature/timeline/popularity/18"
 },
 "interop": [
  {
   "year": 2023,
   "label": "interop-2023-webcomponents",
   "url": "https://wpt.fyi/interop-2023?feature=interop-2023-webcomponents"
  }
 ],
 "wpt": {
  "url": "https://wpt.fyi/results?q=feature:constructed-stylesheets"
 },
 "developerSignals": null,
 "bugs": {
  "chrome": [
   "https://crbug.com/40207149"
  ],
  "chrome_android": [
   "https://crbug.com/40207149"
  ],
  "edge": [
   "https://crbug.com/40207149"
  ],
  "oculus": [
   "https://crbug.com/40207149"
  ],
  "opera": [
   "https://crbug.com/40207149"
  ],
  "opera_android": [
   "https://crbug.com/40207149"
  ],
  "samsunginternet_android": [
   "https://crbug.com/40207149"
  ],
  "webview_android": [
   "https://crbug.com/40207149"
  ]
 },
 "baselineLowDateAsObject": "2023-03-27T00:00:00.000Z",
 "baselineHighDateAsObject": "2025-09-27T00:00:00.000Z"
}