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Fix absent method now on window.Performance #2658

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Merged
merged 1 commit into from
Jun 10, 2020
Merged

Fix absent method now on window.Performance #2658

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32 changes: 18 additions & 14 deletions packages/utils/src/misc.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -382,22 +382,26 @@ export const crossPlatformPerformance: CrossPlatformPerformance = (() => {
}
}

if (getGlobalObject<Window>().performance) {
// Polyfill for performance.timeOrigin.
//
// While performance.timing.navigationStart is deprecated in favor of performance.timeOrigin, performance.timeOrigin
// is not as widely supported. Namely, performance.timeOrigin is undefined in Safari as of writing.
// tslint:disable-next-line:strict-type-predicates
if (performance.timeOrigin === undefined) {
// As of writing, performance.timing is not available in Web Workers in mainstream browsers, so it is not always a
// valid fallback. In the absence of a initial time provided by the browser, fallback to INITIAL_TIME.
// @ts-ignore
// tslint:disable-next-line:deprecation
performance.timeOrigin = (performance.timing && performance.timing.navigationStart) || INITIAL_TIME;
}
const { performance } = getGlobalObject<Window>();

if (!performance || !performance.now) {
return performanceFallback;
}

// Polyfill for performance.timeOrigin.
//
// While performance.timing.navigationStart is deprecated in favor of performance.timeOrigin, performance.timeOrigin
// is not as widely supported. Namely, performance.timeOrigin is undefined in Safari as of writing.
// tslint:disable-next-line:strict-type-predicates
if (performance.timeOrigin === undefined) {
// As of writing, performance.timing is not available in Web Workers in mainstream browsers, so it is not always a
// valid fallback. In the absence of a initial time provided by the browser, fallback to INITIAL_TIME.
// @ts-ignore
// tslint:disable-next-line:deprecation
performance.timeOrigin = (performance.timing && performance.timing.navigationStart) || INITIAL_TIME;
}

return getGlobalObject<Window>().performance || performanceFallback;
return performance;
})();

/**
Expand Down