JavaScript WeakSet Complete 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

<script>
    // 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));
</script>

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

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 Property	Description
constrcutor	Return the wekaMap constructor function for the object.

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 number then it is called an instance method.

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

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