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43 lines
1.8 KiB
43 lines
1.8 KiB
var DESCRIPTORS = require('../internals/descriptors'); |
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var IE8_DOM_DEFINE = require('../internals/ie8-dom-define'); |
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var V8_PROTOTYPE_DEFINE_BUG = require('../internals/v8-prototype-define-bug'); |
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var anObject = require('../internals/an-object'); |
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var toPropertyKey = require('../internals/to-property-key'); |
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var $TypeError = TypeError; |
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// eslint-disable-next-line es-x/no-object-defineproperty -- safe |
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var $defineProperty = Object.defineProperty; |
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// eslint-disable-next-line es-x/no-object-getownpropertydescriptor -- safe |
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var $getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor; |
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var ENUMERABLE = 'enumerable'; |
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var CONFIGURABLE = 'configurable'; |
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var WRITABLE = 'writable'; |
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// `Object.defineProperty` method |
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// https://tc39.es/ecma262/#sec-object.defineproperty |
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exports.f = DESCRIPTORS ? V8_PROTOTYPE_DEFINE_BUG ? function defineProperty(O, P, Attributes) { |
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anObject(O); |
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P = toPropertyKey(P); |
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anObject(Attributes); |
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if (typeof O === 'function' && P === 'prototype' && 'value' in Attributes && WRITABLE in Attributes && !Attributes[WRITABLE]) { |
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var current = $getOwnPropertyDescriptor(O, P); |
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if (current && current[WRITABLE]) { |
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O[P] = Attributes.value; |
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Attributes = { |
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configurable: CONFIGURABLE in Attributes ? Attributes[CONFIGURABLE] : current[CONFIGURABLE], |
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enumerable: ENUMERABLE in Attributes ? Attributes[ENUMERABLE] : current[ENUMERABLE], |
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writable: false |
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}; |
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} |
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} return $defineProperty(O, P, Attributes); |
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} : $defineProperty : function defineProperty(O, P, Attributes) { |
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anObject(O); |
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P = toPropertyKey(P); |
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anObject(Attributes); |
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if (IE8_DOM_DEFINE) try { |
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return $defineProperty(O, P, Attributes); |
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} catch (error) { /* empty */ } |
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if ('get' in Attributes || 'set' in Attributes) throw $TypeError('Accessors not supported'); |
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if ('value' in Attributes) O[P] = Attributes.value; |
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return O; |
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};
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