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25 lines
1.7 KiB
25 lines
1.7 KiB
4 months ago
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import { maybe } from "../globals/index.js";
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export var canUseWeakMap = typeof WeakMap === "function" &&
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!maybe(function () { return navigator.product == "ReactNative" && !global.HermesInternal; });
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export var canUseWeakSet = typeof WeakSet === "function";
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export var canUseSymbol = typeof Symbol === "function" && typeof Symbol.for === "function";
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export var canUseAsyncIteratorSymbol = canUseSymbol && Symbol.asyncIterator;
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export var canUseDOM = typeof maybe(function () { return window.document.createElement; }) === "function";
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var usingJSDOM =
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// Following advice found in this comment from @domenic (maintainer of jsdom):
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// https://github.com/jsdom/jsdom/issues/1537#issuecomment-229405327
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//
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// Since we control the version of Jest and jsdom used when running Apollo
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// Client tests, and that version is recent enought to include " jsdom/x.y.z"
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// at the end of the user agent string, I believe this case is all we need to
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// check. Testing for "Node.js" was recommended for backwards compatibility
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// with older version of jsdom, but we don't have that problem.
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maybe(function () { return navigator.userAgent.indexOf("jsdom") >= 0; }) || false;
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// Our tests should all continue to pass if we remove this !usingJSDOM
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// condition, thereby allowing useLayoutEffect when using jsdom. Unfortunately,
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// if we allow useLayoutEffect, then useSyncExternalStore generates many
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// warnings about useLayoutEffect doing nothing on the server. While these
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// warnings are harmless, this !usingJSDOM condition seems to be the best way to
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// prevent them (i.e. skipping useLayoutEffect when using jsdom).
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export var canUseLayoutEffect = canUseDOM && !usingJSDOM;
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//# sourceMappingURL=canUse.js.map
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