{"version":3,"file":"supports.js","sources":["../../src/supports.ts"],"sourcesContent":["import { logger } from './logger';\nimport { getGlobalObject } from './worldwide';\n\n// eslint-disable-next-line deprecation/deprecation\nconst WINDOW = getGlobalObject<Window>();\n\nexport { supportsHistory } from './vendor/supportsHistory';\n\n/**\n * Tells whether current environment supports ErrorEvent objects\n * {@link supportsErrorEvent}.\n *\n * @returns Answer to the given question.\n */\nexport function supportsErrorEvent(): boolean {\n  try {\n    new ErrorEvent('');\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\n\n/**\n * Tells whether current environment supports DOMError objects\n * {@link supportsDOMError}.\n *\n * @returns Answer to the given question.\n */\nexport function supportsDOMError(): boolean {\n  try {\n    // Chrome: VM89:1 Uncaught TypeError: Failed to construct 'DOMError':\n    // 1 argument required, but only 0 present.\n    // @ts-expect-error It really needs 1 argument, not 0.\n    new DOMError('');\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\n\n/**\n * Tells whether current environment supports DOMException objects\n * {@link supportsDOMException}.\n *\n * @returns Answer to the given question.\n */\nexport function supportsDOMException(): boolean {\n  try {\n    new DOMException('');\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\n\n/**\n * Tells whether current environment supports Fetch API\n * {@link supportsFetch}.\n *\n * @returns Answer to the given question.\n */\nexport function supportsFetch(): boolean {\n  if (!('fetch' in WINDOW)) {\n    return false;\n  }\n\n  try {\n    new Headers();\n    new Request('http://www.example.com');\n    new Response();\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\n/**\n * isNativeFetch checks if the given function is a native implementation of fetch()\n */\n// eslint-disable-next-line @typescript-eslint/ban-types\nexport function isNativeFetch(func: Function): boolean {\n  return func && /^function fetch\\(\\)\\s+\\{\\s+\\[native code\\]\\s+\\}$/.test(func.toString());\n}\n\n/**\n * Tells whether current environment supports Fetch API natively\n * {@link supportsNativeFetch}.\n *\n * @returns true if `window.fetch` is natively implemented, false otherwise\n */\nexport function supportsNativeFetch(): boolean {\n  if (!supportsFetch()) {\n    return false;\n  }\n\n  // Fast path to avoid DOM I/O\n  // eslint-disable-next-line @typescript-eslint/unbound-method\n  if (isNativeFetch(WINDOW.fetch)) {\n    return true;\n  }\n\n  // window.fetch is implemented, but is polyfilled or already wrapped (e.g: by a chrome extension)\n  // so create a \"pure\" iframe to see if that has native fetch\n  let result = false;\n  const doc = WINDOW.document;\n  // eslint-disable-next-line deprecation/deprecation\n  if (doc && typeof (doc.createElement as unknown) === 'function') {\n    try {\n      const sandbox = doc.createElement('iframe');\n      sandbox.hidden = true;\n      doc.head.appendChild(sandbox);\n      if (sandbox.contentWindow && sandbox.contentWindow.fetch) {\n        // eslint-disable-next-line @typescript-eslint/unbound-method\n        result = isNativeFetch(sandbox.contentWindow.fetch);\n      }\n      doc.head.removeChild(sandbox);\n    } catch (err) {\n      __DEBUG_BUILD__ &&\n        logger.warn('Could not create sandbox iframe for pure fetch check, bailing to window.fetch: ', err);\n    }\n  }\n\n  return result;\n}\n\n/**\n * Tells whether current environment supports ReportingObserver API\n * {@link supportsReportingObserver}.\n *\n * @returns Answer to the given question.\n */\nexport function supportsReportingObserver(): boolean {\n  return 'ReportingObserver' in WINDOW;\n}\n\n/**\n * Tells whether current environment supports Referrer Policy API\n * {@link supportsReferrerPolicy}.\n *\n * @returns Answer to the given question.\n */\nexport function supportsReferrerPolicy(): boolean {\n  // Despite all stars in the sky saying that Edge supports old draft syntax, aka 'never', 'always', 'origin' and 'default'\n  // (see https://caniuse.com/#feat=referrer-policy),\n  // it doesn't. And it throws an exception instead of ignoring this parameter...\n  // REF: https://github.com/getsentry/raven-js/issues/1233\n\n  if (!supportsFetch()) {\n    return false;\n  }\n\n  try {\n    new Request('_', {\n      referrerPolicy: 'origin' as ReferrerPolicy,\n    });\n    return true;\n  } catch (e) {\n    return false;\n  }\n}\n"],"names":[],"mappings":";;;AAGA;AACA,MAAA,MAAA,GAAA,eAAA,EAAA,CAAA;AAGA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,SAAA,kBAAA,GAAA;AACA,EAAA,IAAA;AACA,IAAA,IAAA,UAAA,CAAA,EAAA,CAAA,CAAA;AACA,IAAA,OAAA,IAAA,CAAA;AACA,GAAA,CAAA,OAAA,CAAA,EAAA;AACA,IAAA,OAAA,KAAA,CAAA;AACA,GAAA;AACA,CAAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,SAAA,gBAAA,GAAA;AACA,EAAA,IAAA;AACA;AACA;AACA;AACA,IAAA,IAAA,QAAA,CAAA,EAAA,CAAA,CAAA;AACA,IAAA,OAAA,IAAA,CAAA;AACA,GAAA,CAAA,OAAA,CAAA,EAAA;AACA,IAAA,OAAA,KAAA,CAAA;AACA,GAAA;AACA,CAAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,SAAA,oBAAA,GAAA;AACA,EAAA,IAAA;AACA,IAAA,IAAA,YAAA,CAAA,EAAA,CAAA,CAAA;AACA,IAAA,OAAA,IAAA,CAAA;AACA,GAAA,CAAA,OAAA,CAAA,EAAA;AACA,IAAA,OAAA,KAAA,CAAA;AACA,GAAA;AACA,CAAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,SAAA,aAAA,GAAA;AACA,EAAA,IAAA,EAAA,OAAA,IAAA,MAAA,CAAA,EAAA;AACA,IAAA,OAAA,KAAA,CAAA;AACA,GAAA;AACA;AACA,EAAA,IAAA;AACA,IAAA,IAAA,OAAA,EAAA,CAAA;AACA,IAAA,IAAA,OAAA,CAAA,wBAAA,CAAA,CAAA;AACA,IAAA,IAAA,QAAA,EAAA,CAAA;AACA,IAAA,OAAA,IAAA,CAAA;AACA,GAAA,CAAA,OAAA,CAAA,EAAA;AACA,IAAA,OAAA,KAAA,CAAA;AACA,GAAA;AACA,CAAA;AACA;AACA;AACA;AACA;AACA,SAAA,aAAA,CAAA,IAAA,EAAA;AACA,EAAA,OAAA,IAAA,IAAA,kDAAA,CAAA,IAAA,CAAA,IAAA,CAAA,QAAA,EAAA,CAAA,CAAA;AACA,CAAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,SAAA,mBAAA,GAAA;AACA,EAAA,IAAA,CAAA,aAAA,EAAA,EAAA;AACA,IAAA,OAAA,KAAA,CAAA;AACA,GAAA;AACA;AACA;AACA;AACA,EAAA,IAAA,aAAA,CAAA,MAAA,CAAA,KAAA,CAAA,EAAA;AACA,IAAA,OAAA,IAAA,CAAA;AACA,GAAA;AACA;AACA;AACA;AACA,EAAA,IAAA,MAAA,GAAA,KAAA,CAAA;AACA,EAAA,MAAA,GAAA,GAAA,MAAA,CAAA,QAAA,CAAA;AACA;AACA,EAAA,IAAA,GAAA,IAAA,QAAA,GAAA,CAAA,aAAA,EAAA,KAAA,UAAA,EAAA;AACA,IAAA,IAAA;AACA,MAAA,MAAA,OAAA,GAAA,GAAA,CAAA,aAAA,CAAA,QAAA,CAAA,CAAA;AACA,MAAA,OAAA,CAAA,MAAA,GAAA,IAAA,CAAA;AACA,MAAA,GAAA,CAAA,IAAA,CAAA,WAAA,CAAA,OAAA,CAAA,CAAA;AACA,MAAA,IAAA,OAAA,CAAA,aAAA,IAAA,OAAA,CAAA,aAAA,CAAA,KAAA,EAAA;AACA;AACA,QAAA,MAAA,GAAA,aAAA,CAAA,OAAA,CAAA,aAAA,CAAA,KAAA,CAAA,CAAA;AACA,OAAA;AACA,MAAA,GAAA,CAAA,IAAA,CAAA,WAAA,CAAA,OAAA,CAAA,CAAA;AACA,KAAA,CAAA,OAAA,GAAA,EAAA;AACA,MAAA,CAAA,OAAA,gBAAA,KAAA,WAAA,IAAA,gBAAA;AACA,QAAA,MAAA,CAAA,IAAA,CAAA,iFAAA,EAAA,GAAA,CAAA,CAAA;AACA,KAAA;AACA,GAAA;AACA;AACA,EAAA,OAAA,MAAA,CAAA;AACA,CAAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,SAAA,yBAAA,GAAA;AACA,EAAA,OAAA,mBAAA,IAAA,MAAA,CAAA;AACA,CAAA;AACA;AACA;AACA;AACA;AACA;AACA;AACA;AACA,SAAA,sBAAA,GAAA;AACA;AACA;AACA;AACA;AACA;AACA,EAAA,IAAA,CAAA,aAAA,EAAA,EAAA;AACA,IAAA,OAAA,KAAA,CAAA;AACA,GAAA;AACA;AACA,EAAA,IAAA;AACA,IAAA,IAAA,OAAA,CAAA,GAAA,EAAA;AACA,MAAA,cAAA,EAAA,QAAA;AACA,KAAA,CAAA,CAAA;AACA,IAAA,OAAA,IAAA,CAAA;AACA,GAAA,CAAA,OAAA,CAAA,EAAA;AACA,IAAA,OAAA,KAAA,CAAA;AACA,GAAA;AACA;;;;"}