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28 lines
821 B
JavaScript
28 lines
821 B
JavaScript
import isSymbol from '../isSymbol.js'
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/** Used to match property names within property paths. */
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const reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/
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const reIsPlainProp = /^\w*$/
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/**
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* Checks if `value` is a property name and not a property path.
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*
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* @private
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* @param {*} value The value to check.
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* @param {Object} [object] The object to query keys on.
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* @returns {boolean} Returns `true` if `value` is a property name, else `false`.
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*/
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function isKey(value, object) {
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if (Array.isArray(value)) {
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return false
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}
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const type = typeof value
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if (type == 'number' || type == 'boolean' || value == null || isSymbol(value)) {
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return true
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}
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return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
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(object != null && value in Object(object))
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}
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export default isKey
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