{
 "caniuse": [
  "resizeobserver"
 ],
 "compat_features": [
  "api.ResizeObserver",
  "api.ResizeObserver.ResizeObserver",
  "api.ResizeObserver.disconnect",
  "api.ResizeObserver.observe",
  "api.ResizeObserver.observe.options_box_parameter",
  "api.ResizeObserver.unobserve",
  "api.ResizeObserverEntry",
  "api.ResizeObserverEntry.borderBoxSize",
  "api.ResizeObserverEntry.contentBoxSize",
  "api.ResizeObserverEntry.contentRect",
  "api.ResizeObserverEntry.devicePixelContentBoxSize",
  "api.ResizeObserverEntry.target",
  "api.ResizeObserverSize",
  "api.ResizeObserverSize.blockSize",
  "api.ResizeObserverSize.inlineSize"
 ],
 "description": "The ResizeObserver API observes and reacts to changes in the size of DOM elements.",
 "description_html": "The <code>ResizeObserver</code> API observes and reacts to changes in the size of DOM elements.",
 "kind": "feature",
 "name": "Resize observer",
 "spec": [
  "https://drafts.csswg.org/resize-observer-1/"
 ],
 "status": {
  "baseline": "high",
  "baseline_high_date": "2023-01-28",
  "baseline_low_date": "2020-07-28",
  "by_compat_key": {
   "api.ResizeObserver": {
    "baseline": "high",
    "baseline_high_date": "2023-01-28",
    "baseline_low_date": "2020-07-28",
    "support": {
     "chrome": "64",
     "chrome_android": "64",
     "edge": "79",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "13.1",
     "safari_ios": "13.4"
    }
   },
   "api.ResizeObserver.ResizeObserver": {
    "baseline": "high",
    "baseline_high_date": "2023-01-28",
    "baseline_low_date": "2020-07-28",
    "support": {
     "chrome": "64",
     "chrome_android": "64",
     "edge": "79",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "13.1",
     "safari_ios": "13.4"
    }
   },
   "api.ResizeObserver.disconnect": {
    "baseline": "high",
    "baseline_high_date": "2023-01-28",
    "baseline_low_date": "2020-07-28",
    "support": {
     "chrome": "64",
     "chrome_android": "64",
     "edge": "79",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "13.1",
     "safari_ios": "13.4"
    }
   },
   "api.ResizeObserver.observe": {
    "baseline": "high",
    "baseline_high_date": "2023-01-28",
    "baseline_low_date": "2020-07-28",
    "support": {
     "chrome": "64",
     "chrome_android": "64",
     "edge": "79",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "13.1",
     "safari_ios": "13.4"
    }
   },
   "api.ResizeObserver.observe.options_box_parameter": {
    "baseline": "high",
    "baseline_high_date": "2024-09-14",
    "baseline_low_date": "2022-03-14",
    "support": {
     "chrome": "84",
     "chrome_android": "84",
     "edge": "84",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "15.4",
     "safari_ios": "15.4"
    }
   },
   "api.ResizeObserver.unobserve": {
    "baseline": "high",
    "baseline_high_date": "2023-01-28",
    "baseline_low_date": "2020-07-28",
    "support": {
     "chrome": "64",
     "chrome_android": "64",
     "edge": "79",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "13.1",
     "safari_ios": "13.4"
    }
   },
   "api.ResizeObserverEntry": {
    "baseline": "high",
    "baseline_high_date": "2023-01-28",
    "baseline_low_date": "2020-07-28",
    "support": {
     "chrome": "64",
     "chrome_android": "64",
     "edge": "79",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "13.1",
     "safari_ios": "13.4"
    }
   },
   "api.ResizeObserverEntry.borderBoxSize": {
    "baseline": "high",
    "baseline_high_date": "2024-09-14",
    "baseline_low_date": "2022-03-14",
    "support": {
     "chrome": "84",
     "chrome_android": "84",
     "edge": "84",
     "firefox": "92",
     "firefox_android": "92",
     "safari": "15.4",
     "safari_ios": "15.4"
    }
   },
   "api.ResizeObserverEntry.contentBoxSize": {
    "baseline": "high",
    "baseline_high_date": "2024-09-14",
    "baseline_low_date": "2022-03-14",
    "support": {
     "chrome": "84",
     "chrome_android": "84",
     "edge": "84",
     "firefox": "92",
     "firefox_android": "92",
     "safari": "15.4",
     "safari_ios": "15.4"
    }
   },
   "api.ResizeObserverEntry.contentRect": {
    "baseline": "high",
    "baseline_high_date": "2023-01-28",
    "baseline_low_date": "2020-07-28",
    "support": {
     "chrome": "64",
     "chrome_android": "64",
     "edge": "79",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "13.1",
     "safari_ios": "13.4"
    }
   },
   "api.ResizeObserverEntry.devicePixelContentBoxSize": {
    "baseline": false,
    "support": {
     "chrome": "84",
     "chrome_android": "84",
     "edge": "84",
     "firefox": "93",
     "firefox_android": "93"
    }
   },
   "api.ResizeObserverEntry.target": {
    "baseline": "high",
    "baseline_high_date": "2023-01-28",
    "baseline_low_date": "2020-07-28",
    "support": {
     "chrome": "64",
     "chrome_android": "64",
     "edge": "79",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "13.1",
     "safari_ios": "13.4"
    }
   },
   "api.ResizeObserverSize": {
    "baseline": "high",
    "baseline_high_date": "2024-09-14",
    "baseline_low_date": "2022-03-14",
    "support": {
     "chrome": "84",
     "chrome_android": "84",
     "edge": "84",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "15.4",
     "safari_ios": "15.4"
    }
   },
   "api.ResizeObserverSize.blockSize": {
    "baseline": "high",
    "baseline_high_date": "2024-09-14",
    "baseline_low_date": "2022-03-14",
    "support": {
     "chrome": "84",
     "chrome_android": "84",
     "edge": "84",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "15.4",
     "safari_ios": "15.4"
    }
   },
   "api.ResizeObserverSize.inlineSize": {
    "baseline": "high",
    "baseline_high_date": "2024-09-14",
    "baseline_low_date": "2022-03-14",
    "support": {
     "chrome": "84",
     "chrome_android": "84",
     "edge": "84",
     "firefox": "69",
     "firefox_android": "79",
     "safari": "15.4",
     "safari_ios": "15.4"
    }
   }
  },
  "support": {
   "chrome": "64",
   "chrome_android": "64",
   "edge": "79",
   "firefox": "69",
   "firefox_android": "79",
   "safari": "13.1",
   "safari_ios": "13.4"
  }
 },
 "id": "resize-observer",
 "groups": [],
 "specs": [
  {
   "url": "https://drafts.csswg.org/resize-observer-1/",
   "seriesComposition": "full",
   "shortname": "resize-observer-1",
   "series": {
    "shortname": "resize-observer",
    "currentSpecification": "resize-observer-1",
    "title": "Resize Observer",
    "shortTitle": "Resize Observer",
    "releaseUrl": "https://www.w3.org/TR/resize-observer/",
    "nightlyUrl": "https://drafts.csswg.org/resize-observer/"
   },
   "seriesVersion": "1",
   "organization": "W3C",
   "groups": [
    {
     "name": "Cascading Style Sheets (CSS) Working Group",
     "url": "https://www.w3.org/groups/wg/css/"
    }
   ],
   "release": {
    "url": "https://www.w3.org/TR/resize-observer-1/",
    "status": "First Public Working Draft",
    "filename": "Overview.html"
   },
   "nightly": {
    "url": "https://drafts.csswg.org/resize-observer-1/",
    "status": "Editor's Draft",
    "alternateUrls": [
     "https://w3c.github.io/csswg-drafts/resize-observer-1/",
     "https://w3c.github.io/csswg-drafts/resize-observer/"
    ],
    "repository": "https://github.com/w3c/csswg-drafts",
    "sourcePath": "resize-observer-1/Overview.bs",
    "filename": "index.html"
   },
   "title": "Resize Observer",
   "source": "w3c",
   "shortTitle": "Resize Observer",
   "categories": [
    "browser"
   ],
   "standing": "good",
   "tests": {
    "repository": "https://github.com/web-platform-tests/wpt",
    "testPaths": [
     "resize-observer"
    ]
   },
   "fragment": null
  }
 ],
 "mdnUrls": [
  {
   "slug": "Web/API/Resize_Observer_API",
   "title": "Resize Observer API",
   "anchor": null,
   "url": "https://developer.mozilla.org/docs/Web/API/Resize_Observer_API"
  }
 ],
 "standardPositions": [],
 "hasNegativeStandardPosition": false,
 "stateOfSurveys": [],
 "chromeUseCounters": {},
 "interop": [],
 "wpt": {
  "url": "https://wpt.fyi/results?q=feature:resize-observer"
 },
 "developerSignals": null,
 "bugs": {},
 "baselineLowDateAsObject": "2020-07-28T00:00:00.000Z",
 "baselineHighDateAsObject": "2023-01-28T00:00:00.000Z"
}