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- 'use strict';
- 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/no-object-defineproperty -- safe
- var $defineProperty = Object.defineProperty;
- // eslint-disable-next-line es/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 new $TypeError('Accessors not supported');
- if ('value' in Attributes) O[P] = Attributes.value;
- return O;
- };
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