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25 lines
857 B
25 lines
857 B
var getPrototype = require('./_getPrototype');
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/** Used for built-in method references. */
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var objectProto = Object.prototype;
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/** Used to check objects for own properties. */
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var hasOwnProperty = objectProto.hasOwnProperty;
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/**
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* The base implementation of `_.has` without support for deep paths.
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*
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* @private
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* @param {Object} object The object to query.
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* @param {Array|string} key The key to check.
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* @returns {boolean} Returns `true` if `key` exists, else `false`.
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*/
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function baseHas(object, key) {
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// Avoid a bug in IE 10-11 where objects with a [[Prototype]] of `null`,
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// that are composed entirely of index properties, return `false` for
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// `hasOwnProperty` checks of them.
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return hasOwnProperty.call(object, key) ||
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(typeof object == 'object' && key in object && getPrototype(object) === null);
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}
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module.exports = baseHas;
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