JavaScript Map set() method

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

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 Map object.

JavaScript Map set() method example

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

Example 1

Let's see an example to add key and value pair of elements to map object.

Output:

jQuery
AngularJS
Bootstrap

Example 2

In this example, we will determine the result when same key is added with different values.

Output:

AngularJS
undefined
Bootstrap