176 lines
4.6 KiB
JavaScript
176 lines
4.6 KiB
JavaScript
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Object.defineProperty(exports, '__esModule', { value: true });
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const debugBuild = require('./debug-build.js');
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const logger = require('./logger.js');
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const worldwide = require('./worldwide.js');
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// eslint-disable-next-line deprecation/deprecation
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const WINDOW = worldwide.getGlobalObject();
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/**
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* Tells whether current environment supports ErrorEvent objects
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* {@link supportsErrorEvent}.
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*
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* @returns Answer to the given question.
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*/
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function supportsErrorEvent() {
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try {
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new ErrorEvent('');
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return true;
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} catch (e) {
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return false;
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}
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}
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/**
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* Tells whether current environment supports DOMError objects
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* {@link supportsDOMError}.
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*
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* @returns Answer to the given question.
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*/
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function supportsDOMError() {
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try {
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// Chrome: VM89:1 Uncaught TypeError: Failed to construct 'DOMError':
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// 1 argument required, but only 0 present.
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// @ts-expect-error It really needs 1 argument, not 0.
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new DOMError('');
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return true;
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} catch (e) {
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return false;
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}
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}
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/**
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* Tells whether current environment supports DOMException objects
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* {@link supportsDOMException}.
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*
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* @returns Answer to the given question.
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*/
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function supportsDOMException() {
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try {
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new DOMException('');
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return true;
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} catch (e) {
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return false;
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}
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}
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/**
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* Tells whether current environment supports Fetch API
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* {@link supportsFetch}.
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*
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* @returns Answer to the given question.
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*/
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function supportsFetch() {
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if (!('fetch' in WINDOW)) {
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return false;
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}
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try {
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new Headers();
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new Request('http://www.example.com');
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new Response();
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return true;
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} catch (e) {
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return false;
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}
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}
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/**
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* isNativeFetch checks if the given function is a native implementation of fetch()
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*/
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// eslint-disable-next-line @typescript-eslint/ban-types
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function isNativeFetch(func) {
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return func && /^function fetch\(\)\s+\{\s+\[native code\]\s+\}$/.test(func.toString());
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}
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/**
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* Tells whether current environment supports Fetch API natively
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* {@link supportsNativeFetch}.
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*
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* @returns true if `window.fetch` is natively implemented, false otherwise
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*/
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function supportsNativeFetch() {
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if (typeof EdgeRuntime === 'string') {
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return true;
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}
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if (!supportsFetch()) {
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return false;
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}
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// Fast path to avoid DOM I/O
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// eslint-disable-next-line @typescript-eslint/unbound-method
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if (isNativeFetch(WINDOW.fetch)) {
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return true;
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}
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// window.fetch is implemented, but is polyfilled or already wrapped (e.g: by a chrome extension)
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// so create a "pure" iframe to see if that has native fetch
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let result = false;
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const doc = WINDOW.document;
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// eslint-disable-next-line deprecation/deprecation
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if (doc && typeof (doc.createElement ) === 'function') {
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try {
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const sandbox = doc.createElement('iframe');
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sandbox.hidden = true;
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doc.head.appendChild(sandbox);
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if (sandbox.contentWindow && sandbox.contentWindow.fetch) {
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// eslint-disable-next-line @typescript-eslint/unbound-method
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result = isNativeFetch(sandbox.contentWindow.fetch);
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}
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doc.head.removeChild(sandbox);
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} catch (err) {
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debugBuild.DEBUG_BUILD &&
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logger.logger.warn('Could not create sandbox iframe for pure fetch check, bailing to window.fetch: ', err);
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}
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}
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return result;
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}
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/**
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* Tells whether current environment supports ReportingObserver API
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* {@link supportsReportingObserver}.
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*
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* @returns Answer to the given question.
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*/
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function supportsReportingObserver() {
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return 'ReportingObserver' in WINDOW;
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}
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/**
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* Tells whether current environment supports Referrer Policy API
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* {@link supportsReferrerPolicy}.
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*
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* @returns Answer to the given question.
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*/
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function supportsReferrerPolicy() {
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// Despite all stars in the sky saying that Edge supports old draft syntax, aka 'never', 'always', 'origin' and 'default'
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// (see https://caniuse.com/#feat=referrer-policy),
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// it doesn't. And it throws an exception instead of ignoring this parameter...
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// REF: https://github.com/getsentry/raven-js/issues/1233
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if (!supportsFetch()) {
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return false;
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}
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try {
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new Request('_', {
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referrerPolicy: 'origin' ,
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});
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return true;
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} catch (e) {
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return false;
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}
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}
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exports.isNativeFetch = isNativeFetch;
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exports.supportsDOMError = supportsDOMError;
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exports.supportsDOMException = supportsDOMException;
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exports.supportsErrorEvent = supportsErrorEvent;
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exports.supportsFetch = supportsFetch;
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exports.supportsNativeFetch = supportsNativeFetch;
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exports.supportsReferrerPolicy = supportsReferrerPolicy;
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exports.supportsReportingObserver = supportsReportingObserver;
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//# sourceMappingURL=supports.js.map
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