JavaScript Map get() method

The get method of the JavaScript Map object retrieves the value associated with a given key from that Map instance.

Syntax

The get function can be expressed using the syntax outlined below:

mapObj.get(key)

Parameter

key - The key to be searched.

Return

The value of specified key.

JavaScript Map get method example

In this section, we will explore the get method by examining several examples.

Example 1

Let's see a simple example of get method.

<script>

var map=new Map();

map.set(1,"jQuery");

map.set(2,"AngularJS");

map.set(3,"Bootstrap");



document.writeln(map.get(1)+"<br>");

document.writeln(map.get(2)+"<br>");

document.writeln(map.get(3));

</script>

Output:

jQuery

AngularJS

Bootstrap

Example 2

Let’s examine a scenario to ascertain the outcome when a map object does not include the designated key element.

<script>

var map=new Map();

map.set(1,"jQuery");

map.set(2,"AngularJS");

map.set(3,"Bootstrap");



document.writeln(map.get(5)); //returns undefined

</script>

Output:

undefined