es-toolkit
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A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.
21 lines (20 loc) • 525 B
JavaScript
//#region src/compat/predicate/isSymbol.ts
/**
* Check whether a value is a symbol.
*
* This function can also serve as a type predicate in TypeScript, narrowing the type of the argument to `symbol`.
*
* @param value The value to check.
* @returns Returns `true` if `value` is a symbol, else `false`.
* @example
* isSymbol(Symbol.iterator);
* // => true
*
* isSymbol('abc');
* // => false
*/
function isSymbol(value) {
return typeof value === "symbol" || value instanceof Symbol;
}
//#endregion
exports.isSymbol = isSymbol;