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