JavaScript WeakMap

JavaScript WeakMap object is used to store the elements as key-value pairs where keys are weakly referenced.

Syntax:

new WeakMap([iterable])

Where: iterable is the object whose elements are in the form of a key-value pair.

Note: WeakMap object can not contain the primitive type elements. It can contain only object-type elements.

JavaScript WeakMap Methods:

delete()
Use: To delete the specified element from a WeakMap object.

get()
Use: To return the value of specified key.

has()
Use: To indicate whether the Weakmap object contains the specified value element.

set()
Use: To add or update the key-value pairs to WeakMap object.