StringCreate.jsā¢1.07 kB
'use strict';
var GetIntrinsic = require('get-intrinsic');
var $Object = require('es-object-atoms');
var $StringPrototype = GetIntrinsic('%String.prototype%');
var $SyntaxError = require('es-errors/syntax');
var $TypeError = require('es-errors/type');
var setProto = require('set-proto');
var DefinePropertyOrThrow = require('./DefinePropertyOrThrow');
// https://262.ecma-international.org/6.0/#sec-stringcreate
module.exports = function StringCreate(value, prototype) {
if (typeof value !== 'string') {
throw new $TypeError('Assertion failed: `S` must be a String');
}
var S = $Object(value);
if (prototype !== $StringPrototype) {
if (setProto) {
setProto(S, prototype);
} else {
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]]');
}
}
var length = value.length;
DefinePropertyOrThrow(S, 'length', {
'[[Configurable]]': false,
'[[Enumerable]]': false,
'[[Value]]': length,
'[[Writable]]': false
});
return S;
};