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13 KiB
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1 line
13 KiB
JSON
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{"ast":null,"code":"import { getGlobalObject } from './global.js';\nimport { logger } from './logger.js';\n\n/**\n * Tells whether current environment supports ErrorEvent objects\n * {@link supportsErrorEvent}.\n *\n * @returns Answer to the given question.\n */\nfunction supportsErrorEvent() {\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 */\nfunction supportsDOMError() {\n try {\n // Chrome: VM89:1 Uncaught TypeError: Failed to construct 'DOMError':\n // 1 argument required, but only 0 present.\n // @ts-ignore 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 */\nfunction supportsDOMException() {\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 */\nfunction supportsFetch() {\n if (!('fetch' in getGlobalObject())) {\n return false;\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 */\nfunction isNativeFetch(func) {\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 */\nfunction supportsNativeFetch() {\n if (!supportsFetch()) {\n return false;\n }\n var global = getGlobalObject();\n\n // Fast path to avoid DOM I/O\n if (isNativeFetch(global.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 var doc = global.document;\n if (doc && typeof doc.createElement === 'function') {\n try {\n var sandbox = doc.createElement('iframe');\n sandbox.hidden = true;\n doc.head.appendChild(sandbox);\n if (sandbox.contentWindow && sandbox.contentWindow.fetch) {\n result = isNativeFetch(sandbox.contentWindow.fetch);\n }\n doc.head.removeChild(sandbox);\n } catch (err) {\n (typeof __SENTRY_DEBUG__ === 'undefined' || __SENTRY_DEBUG__) && logger.warn('Could not create sandbox iframe for pure fetch check, bailing to window.fetch: ', err);\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 */\nfunction supportsReportingObserver() {\n return 'ReportingObserver' in getGlobalObject();\n}\n\n/**\n * Tells whether current environment supports Referrer Policy API\n * {@link supportsReferrerPolicy}.\n *\n * @returns Answer to the given question.\n */\nfunction supportsReferrerPolicy() {\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 try {\n new Request('_', {\n referrerPolicy: 'origin'\n });\n return true;\n } catch (e) {\n return false;\n }\n}\n\n/**\n * Tells whether current environment supports History API\n * {@link supportsHistory}.\n *\n * @returns Answer to the given ques
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