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- 'use strict';
-
- var callBound = require('../helpers/callBound');
- var forEach = require('../helpers/forEach');
- var OwnPropertyKeys = require('../helpers/OwnPropertyKeys');
-
- var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
-
- var IsArray = require('./IsArray');
- var IsPropertyKey = require('./IsPropertyKey');
- var Type = require('./Type');
-
- // https://www.ecma-international.org/ecma-262/9.0/#sec-copydataproperties
-
- module.exports = function CopyDataProperties(target, source, excludedItems) {
- if (Type(target) !== 'Object') {
- throw new TypeError('Assertion failed: "target" must be an Object');
- }
-
- if (!IsArray(excludedItems)) {
- throw new TypeError('Assertion failed: "excludedItems" must be a List of Property Keys');
- }
- for (var i = 0; i < excludedItems.length; i += 1) {
- if (!IsPropertyKey(excludedItems[i])) {
- throw new TypeError('Assertion failed: "excludedItems" must be a List of Property Keys');
- }
- }
-
- if (typeof source === 'undefined' || source === null) {
- return target;
- }
-
- var ES = this;
-
- var fromObj = ES.ToObject(source);
-
- var sourceKeys = OwnPropertyKeys(fromObj);
- forEach(sourceKeys, function (nextKey) {
- var excluded = false;
-
- forEach(excludedItems, function (e) {
- if (ES.SameValue(e, nextKey) === true) {
- excluded = true;
- }
- });
-
- var enumerable = $isEnumerable(fromObj, nextKey) || (
- // this is to handle string keys being non-enumerable in older engines
- typeof source === 'string'
- && nextKey >= 0
- && ES.IsInteger(ES.ToNumber(nextKey))
- );
- if (excluded === false && enumerable) {
- var propValue = ES.Get(fromObj, nextKey);
- ES.CreateDataProperty(target, nextKey, propValue);
- }
- });
-
- return target;
- };
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