Sha256: 37db945900de64ac6800eae6edb94664f98311f93f8aea101c3751b8815be19c
Contents?: true
Size: 839 Bytes
Versions: 243
Compression:
Stored size: 839 Bytes
Contents
'use strict';
var GetIntrinsic = require('get-intrinsic');
var $species = GetIntrinsic('%Symbol.species%', true);
var $TypeError = GetIntrinsic('%TypeError%');
var IsConstructor = require('./IsConstructor');
var Type = require('./Type');
// https://262.ecma-international.org/6.0/#sec-speciesconstructor
module.exports = function SpeciesConstructor(O, defaultConstructor) {
if (Type(O) !== 'Object') {
throw new $TypeError('Assertion failed: Type(O) is not Object');
}
var C = O.constructor;
if (typeof C === 'undefined') {
return defaultConstructor;
}
if (Type(C) !== 'Object') {
throw new $TypeError('O.constructor is not an Object');
}
var S = $species ? C[$species] : void 0;
if (S == null) {
return defaultConstructor;
}
if (IsConstructor(S)) {
return S;
}
throw new $TypeError('no constructor found');
};
Version data entries
243 entries across 27 versions & 2 rubygems