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@zedux/core

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A high-level, declarative, composable form of Redux

omnistac.github.io/zedux/

Omnistac/zedux

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/** * is() - Checks if a value is an instance of a class * * We can't use instanceof 'cause that breaks across realms - e.g. when an atom * instance is shared between a parent and child window, that instance's object * reference will be different in both windows (since each window creates its * own copy of Zedux). * * The classToCheck should have a static $$typeof property whose value is a * symbol created with Symbol.for() (sharing the symbol reference across realms) * * This works no matter how deep the inheritance tree is for either object * passed. * * @param val anything - the thing we're checking * @param classToCheck a class with a static $$typeof property * @returns boolean - whether val is an instanceof classToCheck */ export const is = (val, classToCheck) => { var _a; return ((_a = val === null || val === void 0 ? void 0 : val.constructor) === null || _a === void 0 ? void 0 : _a.$$typeof) === classToCheck.$$typeof; };