Set.prototype

The Set.prototype property represents the prototype for the Set constructor.

Set instances inherit from Set.prototype. You can use the constructor's prototype object to add properties or methods to all Set instances.

Set.prototype.constructor

Возвращает функцию, которая создала прототип экземпляра. Это функция Set по умолчанию.

Set.prototype.size

Возвращает количество элементов в объекте Set.

Set.prototype.add(value)

Добавляет новый элемент с переданным значением в Set объект. Возвращает Set объект.

Set.prototype.clear()

Removes all elements from the Set object.

Set.prototype.delete(value)

Removes the element associated to the value and returns the value that Set.prototype.has(value) would have previously returned. Set.prototype.has(value) will return false afterwards.

Set.prototype.entries()

Returns a new Iterator object that contains an array of [value, value] for each element in the Set object, in insertion order. This is kept similar to the Map object, so that each entry has the same value for its key and value here.

Set.prototype.forEach(callbackFn[, thisArg])

Calls callbackFn once for each value present in the Set object, in insertion order. If a thisArg parameter is provided to forEach, it will be used as the this value for each callback.

Set.prototype.has(value)

Returns a boolean asserting whether an element is present with the given value in the Set object or not.

Set.prototype.keys() (en-US)

Is the same function as the values() function and returns a new Iterator object that contains the values for each element in the Set object in insertion order.

Set.prototype.values()

Returns a new Iterator object that contains the values for each element in the Set object in insertion order.

Set.prototype[@@iterator]() (en-US)

Returns a new Iterator object that contains the values for each element in the Set object in insertion order.

• Map.prototype