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24 lines
911 B
JavaScript
24 lines
911 B
JavaScript
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'use strict';
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var $ = require('../internals/export');
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var DESCRIPTORS = require('../internals/descriptors');
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var FORCED = require('../internals/object-prototype-accessors-forced');
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var toObject = require('../internals/to-object');
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var toPropertyKey = require('../internals/to-property-key');
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var getPrototypeOf = require('../internals/object-get-prototype-of');
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var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;
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// `Object.prototype.__lookupSetter__` method
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// https://tc39.es/ecma262/#sec-object.prototype.__lookupSetter__
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if (DESCRIPTORS) {
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$({ target: 'Object', proto: true, forced: FORCED }, {
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__lookupSetter__: function __lookupSetter__(P) {
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var O = toObject(this);
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var key = toPropertyKey(P);
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var desc;
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do {
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if (desc = getOwnPropertyDescriptor(O, key)) return desc.set;
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} while (O = getPrototypeOf(O));
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}
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});
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}
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