JavaScript Map set()

Definition and usage

set() The method is used to add elements to the Map.

set() The method can also be used to update elements in the Map.

Instance

Example 1

You can use set() The method adds elements to the Map:

// Create a Map
const fruits = new Map();
// Set the value of the Map
fruits.set("apples", 500);
fruits.set("bananas", 300);
fruits.set("oranges", 200);

Try it yourself

Example 2

set() The method can also be used to change the existing values in the Map:

fruits.set("apples", 500);

Try it yourself

Syntax

map.set(key, value)

Parameters

Return value

Browser support

map.set() Is a feature of ECMAScript6 (ES6).

Starting from June 2017, all modern browsers support ES6 (JavaScript 2015):

map.set() Not Supported in Internet Explorer.