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.

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Output:

jQuery  AngularJS  Bootstrap  

Example 2

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

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Output:

jQuery  AngularJS  Bootstrap  

Example 3

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

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Output:

jQuery  Bootstrap  Bootstrap