object-define-property.js
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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 $TypeError('Accessors not supported');
if ('value' in Attributes) O[P] = Attributes.value;
return O;
};