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Direktori : /var/www/html/node_modules/es-abstract/2021/ |
Current File : //var/www/html/node_modules/es-abstract/2021/OrdinaryObjectCreate.js |
'use strict'; var GetIntrinsic = require('get-intrinsic'); var $ObjectCreate = GetIntrinsic('%Object.create%', true); var $TypeError = GetIntrinsic('%TypeError%'); var $SyntaxError = GetIntrinsic('%SyntaxError%'); var IsArray = require('./IsArray'); var Type = require('./Type'); var hasProto = !({ __proto__: null } instanceof Object); // https://262.ecma-international.org/6.0/#sec-objectcreate module.exports = function OrdinaryObjectCreate(proto) { if (proto !== null && Type(proto) !== 'Object') { throw new $TypeError('Assertion failed: `proto` must be null or an object'); } var additionalInternalSlotsList = arguments.length < 2 ? [] : arguments[1]; if (!IsArray(additionalInternalSlotsList)) { throw new $TypeError('Assertion failed: `additionalInternalSlotsList` must be an Array'); } // var internalSlotsList = ['[[Prototype]]', '[[Extensible]]']; if (additionalInternalSlotsList.length > 0) { throw new $SyntaxError('es-abstract does not yet support internal slots'); // internalSlotsList.push(...additionalInternalSlotsList); } // var O = MakeBasicObject(internalSlotsList); // setProto(O, proto); // return O; if ($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(); };