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Viewing file:     supports.js (5.08 KB)      -rw-r--r--

import { logger } from './logger';
import { getGlobalObject } from './misc';
/**
 * Tells whether current environment supports ErrorEvent objects
 * {@link supportsErrorEvent}.
 *
 * @returns Answer to the given question.
 */
export function supportsErrorEvent() {
    try {
        new ErrorEvent('');
        return true;
    }
    catch (e) {
        return false;
    }
}
/**
 * Tells whether current environment supports DOMError objects
 * {@link supportsDOMError}.
 *
 * @returns Answer to the given question.
 */
export function supportsDOMError() {
    try {
        // Chrome: VM89:1 Uncaught TypeError: Failed to construct 'DOMError':
        // 1 argument required, but only 0 present.
        // @ts-ignore It really needs 1 argument, not 0.
        new DOMError('');
        return true;
    }
    catch (e) {
        return false;
    }
}
/**
 * Tells whether current environment supports DOMException objects
 * {@link supportsDOMException}.
 *
 * @returns Answer to the given question.
 */
export function supportsDOMException() {
    try {
        new DOMException('');
        return true;
    }
    catch (e) {
        return false;
    }
}
/**
 * Tells whether current environment supports Fetch API
 * {@link supportsFetch}.
 *
 * @returns Answer to the given question.
 */
export function supportsFetch() {
    if (!('fetch' in getGlobalObject())) {
        return false;
    }
    try {
        new Headers();
        new Request('');
        new Response();
        return true;
    }
    catch (e) {
        return false;
    }
}
/**
 * isNativeFetch checks if the given function is a native implementation of fetch()
 */
// eslint-disable-next-line @typescript-eslint/ban-types
function isNativeFetch(func) {
    return func && /^function fetch\(\)\s+\{\s+\[native code\]\s+\}$/.test(func.toString());
}
/**
 * Tells whether current environment supports Fetch API natively
 * {@link supportsNativeFetch}.
 *
 * @returns true if `window.fetch` is natively implemented, false otherwise
 */
export function supportsNativeFetch() {
    if (!supportsFetch()) {
        return false;
    }
    var global = getGlobalObject();
    // Fast path to avoid DOM I/O
    // eslint-disable-next-line @typescript-eslint/unbound-method
    if (isNativeFetch(global.fetch)) {
        return true;
    }
    // window.fetch is implemented, but is polyfilled or already wrapped (e.g: by a chrome extension)
    // so create a "pure" iframe to see if that has native fetch
    var result = false;
    var doc = global.document;
    // eslint-disable-next-line deprecation/deprecation
    if (doc && typeof doc.createElement === "function") {
        try {
            var sandbox = doc.createElement('iframe');
            sandbox.hidden = true;
            doc.head.appendChild(sandbox);
            if (sandbox.contentWindow && sandbox.contentWindow.fetch) {
                // eslint-disable-next-line @typescript-eslint/unbound-method
                result = isNativeFetch(sandbox.contentWindow.fetch);
            }
            doc.head.removeChild(sandbox);
        }
        catch (err) {
            logger.warn('Could not create sandbox iframe for pure fetch check, bailing to window.fetch: ', err);
        }
    }
    return result;
}
/**
 * Tells whether current environment supports ReportingObserver API
 * {@link supportsReportingObserver}.
 *
 * @returns Answer to the given question.
 */
export function supportsReportingObserver() {
    return 'ReportingObserver' in getGlobalObject();
}
/**
 * Tells whether current environment supports Referrer Policy API
 * {@link supportsReferrerPolicy}.
 *
 * @returns Answer to the given question.
 */
export function supportsReferrerPolicy() {
    // Despite all stars in the sky saying that Edge supports old draft syntax, aka 'never', 'always', 'origin' and 'default
    // https://caniuse.com/#feat=referrer-policy
    // It doesn't. And it throw exception instead of ignoring this parameter...
    // REF: https://github.com/getsentry/raven-js/issues/1233
    if (!supportsFetch()) {
        return false;
    }
    try {
        new Request('_', {
            referrerPolicy: 'origin',
        });
        return true;
    }
    catch (e) {
        return false;
    }
}
/**
 * Tells whether current environment supports History API
 * {@link supportsHistory}.
 *
 * @returns Answer to the given question.
 */
export function supportsHistory() {
    // NOTE: in Chrome App environment, touching history.pushState, *even inside
    //       a try/catch block*, will cause Chrome to output an error to console.error
    // borrowed from: https://github.com/angular/angular.js/pull/13945/files
    var global = getGlobalObject();
    /* eslint-disable @typescript-eslint/no-unsafe-member-access */
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    var chrome = global.chrome;
    var isChromePackagedApp = chrome && chrome.app && chrome.app.runtime;
    /* eslint-enable @typescript-eslint/no-unsafe-member-access */
    var hasHistoryApi = 'history' in global && !!global.history.pushState && !!global.history.replaceState;
    return !isChromePackagedApp && hasHistoryApi;
}
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