Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Global_Objects/WeakMap/get below:

WeakMap.prototype.get() - JavaScript | MDN

Baseline Widely available

Метод get() возвращает элемент из объекта WeakMap,

key

Обязателен. Ключ элемента, который будет возвращён из объекта WeakMap.

Возвращает элемент по указанному ключу или undefined, если ключ не может быть найден в объекте WeakMap.

var wm = new WeakMap();
wm.set(window, "foo");

wm.get(window); // Возвращает "foo".
wm.get("baz"); // Возвращает undefined.

• Prior to SpiderMonkey 38, this method threw a TypeError when the key parameter was not an object. However, the latest ES6 standard specifies to return undefined instead. Furthermore, WeakMap.prototype.get accepted an optional second argument as a fallback value, which is not part of the standard. Both non-standard behaviors are removed in version 38 and higher (Firefox bug 1127827).

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4