/
TON618OFF
/
FinalPWHTML
Обзор
Документация
Войти
/
TON618OFF
/
FinalPWHTML
Код
Запросы
0
Задачи
Вики
Пакеты
0
Релизы
0
Аналитика
Безопасность
main
node_modules/object.assign/polyfill.js
55 строк
1 KB
TON618OFF
не ну это ваще
23 июн 2024, 00:30
23 июн 2024, 00:30
e27ae20
Код
Авторство
О чём код?
'use strict'; var implementation = require('./implementation'); var lacksProperEnumerationOrder = function () { if (!Object.assign) { return false; } /* * v8, specifically in node 4.x, has a bug with incorrect property enumeration order * note: this does not detect the bug unless there's 20 characters */ var str = 'abcdefghijklmnopqrst'; var letters = str.split(''); var map = {}; for (var i = 0; i < letters.length; ++i) { map[letters[i]] = letters[i]; } var obj = Object.assign({}, map); var actual = ''; for (var k in obj) { actual += k; } return str !== actual; }; var assignHasPendingExceptions = function () { if (!Object.assign || !Object.preventExtensions) { return false; } /* * Firefox 37 still has "pending exception" logic in its Object.assign implementation, * which is 72% slower than our shim, and Firefox 40's native implementation. */ var thrower = Object.preventExtensions({ 1: 2 }); try { Object.assign(thrower, 'xy'); } catch (e) { return thrower[1] === 'y'; } return false; }; module.exports = function getPolyfill() { if (!Object.assign) { return implementation; } if (lacksProperEnumerationOrder()) { return implementation; } if (assignHasPendingExceptions()) { return implementation; } return Object.assign; };