JavaScript WeakMap set() method

The JavaScript WeakMap set() method is used to add or update an element to WeakMap object with the particular key-value pair. Each value must have a unique key (i.e. object).

Syntax

The set() method is represented by the following syntax:

Parameter

key - It represents the key to be added.

value - It represents the value to be added.

Return

The WeakMap object.

JavaScript WeakMap set() method example

Here, we will understand set() method through various examples.

Example 1

Let's see an example to add elements to WeakMap object.

Output:

jQuery
AngularJS
Bootstrap

Example 2

Let's see an example to add elements to WeakMap object in chainable form.

Output:

jQuery
AngularJS
Bootstrap

Example 3

In this example, we will determine the result when different values are added to the same object.

Output:

jQuery
Bootstrap
Bootstrap