%PDF- %PDF-
Direktori : /var/www/html/node_modules/es-abstract/2017/ |
Current File : //var/www/html/node_modules/es-abstract/2017/ObjectCreate.js |
'use strict'; var GetIntrinsic = require('get-intrinsic'); var $ObjectCreate = GetIntrinsic('%Object.create%', true); var $TypeError = GetIntrinsic('%TypeError%'); var $SyntaxError = GetIntrinsic('%SyntaxError%'); var Type = require('./Type'); var hasProto = !({ __proto__: null } instanceof Object); // https://ecma-international.org/ecma-262/6.0/#sec-objectcreate module.exports = function ObjectCreate(proto, internalSlotsList) { if (proto !== null && Type(proto) !== 'Object') { throw new $TypeError('Assertion failed: `proto` must be null or an object'); } var slots = arguments.length < 2 ? [] : internalSlotsList; if (slots.length > 0) { throw new $SyntaxError('es-abstract does not yet support internal slots'); } if ($ObjectCreate) { return $ObjectCreate(proto); } if (hasProto) { return { __proto__: proto }; } if (proto === null) { throw new $SyntaxError('native Object.create support is required to create null objects'); } var T = function T() {}; T.prototype = proto; return new T(); };