70 lines
1.9 KiB
JavaScript
70 lines
1.9 KiB
JavaScript
'use strict';
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var $TypeError = require('es-errors/type');
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var callBound = require('call-bound');
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var forEach = require('../helpers/forEach');
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var every = require('../helpers/every');
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var some = require('../helpers/some');
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var OwnPropertyKeys = require('own-keys');
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var $isEnumerable = callBound('Object.prototype.propertyIsEnumerable');
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var CreateDataPropertyOrThrow = require('./CreateDataPropertyOrThrow');
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var Get = require('./Get');
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var IsArray = require('./IsArray');
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var IsIntegralNumber = require('./IsIntegralNumber');
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var isPropertyKey = require('../helpers/isPropertyKey');
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var SameValue = require('./SameValue');
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var ToNumber = require('./ToNumber');
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var ToObject = require('./ToObject');
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var isObject = require('../helpers/isObject');
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// https://262.ecma-international.org/12.0/#sec-copydataproperties
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module.exports = function CopyDataProperties(target, source, excludedItems) {
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if (!isObject(target)) {
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throw new $TypeError('Assertion failed: "target" must be an Object');
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}
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if (!IsArray(excludedItems) || !every(excludedItems, isPropertyKey)) {
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throw new $TypeError('Assertion failed: "excludedItems" must be a List of Property Keys');
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}
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if (typeof source === 'undefined' || source === null) {
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return target;
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}
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var from = ToObject(source);
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var keys = OwnPropertyKeys(from);
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forEach(keys, function (nextKey) {
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var excluded = some(excludedItems, function (e) {
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return SameValue(e, nextKey) === true;
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});
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/*
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var excluded = false;
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forEach(excludedItems, function (e) {
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if (SameValue(e, nextKey) === true) {
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excluded = true;
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}
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});
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*/
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var enumerable = $isEnumerable(from, nextKey) || (
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// this is to handle string keys being non-enumerable in older engines
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typeof source === 'string'
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&& nextKey >= 0
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&& IsIntegralNumber(ToNumber(nextKey))
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);
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if (excluded === false && enumerable) {
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var propValue = Get(from, nextKey);
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CreateDataPropertyOrThrow(target, nextKey, propValue);
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}
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});
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return target;
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};
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