45 lines
1.9 KiB
JavaScript
45 lines
1.9 KiB
JavaScript
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'use strict';
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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/no-object-defineproperty -- safe
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var $defineProperty = Object.defineProperty;
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// eslint-disable-next-line es/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 new $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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