You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
51 lines
1.3 KiB
51 lines
1.3 KiB
'use strict';
|
|
|
|
var GetIntrinsic = require('get-intrinsic');
|
|
|
|
var $ObjectCreate = GetIntrinsic('%Object.create%', true);
|
|
var $TypeError = require('es-errors/type');
|
|
var $SyntaxError = require('es-errors/syntax');
|
|
|
|
var IsArray = require('./IsArray');
|
|
|
|
var forEach = require('../helpers/forEach');
|
|
var isObject = require('../helpers/isObject');
|
|
|
|
var SLOT = require('internal-slot');
|
|
|
|
var hasProto = require('has-proto')();
|
|
|
|
// https://262.ecma-international.org/6.0/#sec-objectcreate
|
|
|
|
module.exports = function ObjectCreate(proto, internalSlotsList) {
|
|
if (proto !== null && !isObject(proto)) {
|
|
throw new $TypeError('Assertion failed: `proto` must be null or an object');
|
|
}
|
|
var slots = arguments.length < 2 ? [] : internalSlotsList; // step 1
|
|
if (arguments.length >= 2 && !IsArray(slots)) {
|
|
throw new $TypeError('Assertion failed: `internalSlotsList` must be an Array');
|
|
}
|
|
|
|
var O;
|
|
if ($ObjectCreate) {
|
|
O = $ObjectCreate(proto);
|
|
} else if (hasProto) {
|
|
O = { __proto__: proto };
|
|
} else {
|
|
if (proto === null) {
|
|
throw new $SyntaxError('native Object.create support is required to create null objects');
|
|
}
|
|
var T = function T() {};
|
|
T.prototype = proto;
|
|
O = new T();
|
|
}
|
|
|
|
if (slots.length > 0) {
|
|
forEach(slots, function (slot) {
|
|
SLOT.set(O, slot, void undefined);
|
|
});
|
|
}
|
|
|
|
return O; // step 6
|
|
};
|