27 lines
1.1 KiB
JavaScript
27 lines
1.1 KiB
JavaScript
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const require_isSymbol = require("../predicate/isSymbol.js");
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//#region src/compat/_internal/isKey.ts
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/** Matches any deep property path. (e.g. `a.b[0].c`)*/
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const regexIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/;
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/** Matches any word character (alphanumeric & underscore).*/
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const regexIsPlainProp = /^\w*$/;
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/**
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* Checks if `value` is a property name and not a property path. (It's ok that the `value` is not in the keys of the `object`)
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* @param {unknown} value The value to check.
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* @param {unknown} object The object to query.
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* @returns {boolean} Returns `true` if `value` is a property name, else `false`.
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*
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* @example
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* isKey('a', { a: 1 });
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* // => true
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*
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* isKey('a.b', { a: { b: 2 } });
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* // => false
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*/
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function isKey(value, object) {
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if (Array.isArray(value)) return false;
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if (typeof value === "number" || typeof value === "boolean" || value == null || require_isSymbol.isSymbol(value)) return true;
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return typeof value === "string" && (regexIsPlainProp.test(value) || !regexIsDeepProp.test(value)) || object != null && Object.hasOwn(object, value);
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}
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//#endregion
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exports.isKey = isKey;
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