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41 lines
1.1 KiB
41 lines
1.1 KiB
4 years ago
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'use strict';
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var GetIntrinsic = require('get-intrinsic');
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var $Object = GetIntrinsic('%Object%');
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var $StringPrototype = GetIntrinsic('%String.prototype%');
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var $SyntaxError = GetIntrinsic('%SyntaxError%');
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var $TypeError = GetIntrinsic('%TypeError%');
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var DefinePropertyOrThrow = require('./DefinePropertyOrThrow');
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var Type = require('./Type');
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var setProto = require('../helpers/setProto');
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// https://262.ecma-international.org/6.0/#sec-stringcreate
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module.exports = function StringCreate(value, prototype) {
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if (Type(value) !== 'String') {
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throw new $TypeError('Assertion failed: `S` must be a String');
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}
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var S = $Object(value);
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if (S !== $StringPrototype) {
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if (setProto) {
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setProto(S, prototype);
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} else {
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throw new $SyntaxError('StringCreate: a `proto` argument that is not `String.prototype` is not supported in an environment that does not support setting the [[Prototype]]');
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}
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}
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var length = value.length;
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DefinePropertyOrThrow(S, 'length', {
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'[[Configurable]]': false,
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'[[Enumerable]]': false,
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'[[Value]]': length,
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'[[Writable]]': false
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});
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return S;
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};
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