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13 lines
497 B
JavaScript
13 lines
497 B
JavaScript
// 19.1.2.9 / 15.2.3.2 Object.getPrototypeOf(O)
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var has = require('./_has')
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, toObject = require('./_to-object')
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, IE_PROTO = require('./_shared-key')('IE_PROTO')
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, ObjectProto = Object.prototype;
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module.exports = Object.getPrototypeOf || function(O){
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O = toObject(O);
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if(has(O, IE_PROTO))return O[IE_PROTO];
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if(typeof O.constructor == 'function' && O instanceof O.constructor){
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return O.constructor.prototype;
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} return O instanceof Object ? ObjectProto : null;
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}; |