[6a3a178] | 1 | 'use strict';
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| 2 | var DESCRIPTORS = require('../internals/descriptors');
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| 3 | var fails = require('../internals/fails');
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| 4 | var objectKeys = require('../internals/object-keys');
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| 5 | var getOwnPropertySymbolsModule = require('../internals/object-get-own-property-symbols');
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| 6 | var propertyIsEnumerableModule = require('../internals/object-property-is-enumerable');
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| 7 | var toObject = require('../internals/to-object');
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| 8 | var IndexedObject = require('../internals/indexed-object');
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| 9 |
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| 10 | // eslint-disable-next-line es/no-object-assign -- safe
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| 11 | var $assign = Object.assign;
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| 12 | // eslint-disable-next-line es/no-object-defineproperty -- required for testing
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| 13 | var defineProperty = Object.defineProperty;
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| 14 |
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| 15 | // `Object.assign` method
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| 16 | // https://tc39.es/ecma262/#sec-object.assign
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| 17 | module.exports = !$assign || fails(function () {
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| 18 | // should have correct order of operations (Edge bug)
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| 19 | if (DESCRIPTORS && $assign({ b: 1 }, $assign(defineProperty({}, 'a', {
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| 20 | enumerable: true,
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| 21 | get: function () {
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| 22 | defineProperty(this, 'b', {
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| 23 | value: 3,
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| 24 | enumerable: false
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| 25 | });
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| 26 | }
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| 27 | }), { b: 2 })).b !== 1) return true;
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| 28 | // should work with symbols and should have deterministic property order (V8 bug)
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| 29 | var A = {};
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| 30 | var B = {};
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| 31 | // eslint-disable-next-line es/no-symbol -- safe
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| 32 | var symbol = Symbol();
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| 33 | var alphabet = 'abcdefghijklmnopqrst';
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| 34 | A[symbol] = 7;
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| 35 | alphabet.split('').forEach(function (chr) { B[chr] = chr; });
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| 36 | return $assign({}, A)[symbol] != 7 || objectKeys($assign({}, B)).join('') != alphabet;
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| 37 | }) ? function assign(target, source) { // eslint-disable-line no-unused-vars -- required for `.length`
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| 38 | var T = toObject(target);
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| 39 | var argumentsLength = arguments.length;
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| 40 | var index = 1;
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| 41 | var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;
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| 42 | var propertyIsEnumerable = propertyIsEnumerableModule.f;
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| 43 | while (argumentsLength > index) {
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| 44 | var S = IndexedObject(arguments[index++]);
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| 45 | var keys = getOwnPropertySymbols ? objectKeys(S).concat(getOwnPropertySymbols(S)) : objectKeys(S);
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| 46 | var length = keys.length;
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| 47 | var j = 0;
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| 48 | var key;
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| 49 | while (length > j) {
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| 50 | key = keys[j++];
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| 51 | if (!DESCRIPTORS || propertyIsEnumerable.call(S, key)) T[key] = S[key];
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| 52 | }
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| 53 | } return T;
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| 54 | } : $assign;
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