JavaScript WeakSet Reference

JavaScript WeakSet is used to store a collection of objects. It adapts the same properties as that of a set i.e. does not store duplicates. The major difference between WeakSet and a set is that a WeakSet is a collection of objects and not values of some particular type.

Syntax:

weakSet.function();

Example: In this example we will use the JavaScript weakSet() method.

Javascript

// Constructing a weakSet() object
const A = new WeakSet();

// Constructing new objects
const object1 = {};

// Adding the new object to the weakSet
A.add(object1);

// Checking whether the new object is present
// in the weakSet or not
console.log(A.has(object1));

Output:

true

The complete list of JavaScript WeakSet is listed below:

JavaScript WeakSet Constructor: In JavaScript, a constructor gets called when an object is created using the new keyword.

Constructor	Description	Example
weakSet()	A constructor gets called when an object is created using the new keyword.	Try

JavaScript WeakSet Properties: A JavaScript property is a member of an object that associates a key with a value. There is no static property in the weakSet only instance property.

• Instance Properties: An instance property is a property that has a new copy for every new instance of the class.

Instance Property	Description	Example
constructor	Return the wekaMap constructor function for the object.	Try

JavaScript WeakSet Method: JavaScript methods are actions that can be performed on objects.

• Instance Method: If the method is called on an instance of a WeakSet then it is called an instance method of WeakSet.

Instance Method	Description	Example
add()	Add an object at the end of an object WeakSet.	Try
delete()	Delete a specific element from a weakSet object.	Try
has()	Return a boolean value indicating whether an object is present in a weakSet or not. that	Try