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