Map.constructor

Creates a new Map instance.

Syntax

new Map(arg?)

Parameters

• arg optional

  An Array or other iterable object whose elements are key-value pairs (2-element Arrays). Each key-value pair is added to the new Map; null is treated as undefined.

Examples

const map = new Map()

Map {}

const map = new Map([["myKey", "myValue"]])
map.get("myKey")

"myValue"