| 1 | 'use strict';
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| 2 | var hasOwn = require('../internals/has-own-property');
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| 3 | var ownKeys = require('../internals/own-keys');
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| 4 | var getOwnPropertyDescriptorModule = require('../internals/object-get-own-property-descriptor');
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| 5 | var definePropertyModule = require('../internals/object-define-property');
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| 6 |
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| 7 | module.exports = function (target, source, exceptions) {
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| 8 | var keys = ownKeys(source);
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| 9 | var defineProperty = definePropertyModule.f;
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| 10 | var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule.f;
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| 11 | for (var i = 0; i < keys.length; i++) {
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| 12 | var key = keys[i];
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| 13 | if (!hasOwn(target, key) && !(exceptions && hasOwn(exceptions, key))) {
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| 14 | defineProperty(target, key, getOwnPropertyDescriptor(source, key));
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| 15 | }
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| 16 | }
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| 17 | };
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