The set() method of Map instances adds or updates an entry in this map with a specified key and a value.
Syntax
set(key, value)
Parameters
key- : The key of the element to add to the
Mapobject. The key may be any JavaScript type (any primitive value or any type of JavaScript object).
- : The key of the element to add to the
value- : The value of the element to add to the
Mapobject. The value may be any JavaScript type (any primitive value or any type of JavaScript object).
- : The value of the element to add to the
Return value
The Map object.
Examples
Using set()
const myMap = new Map();
// Add new elements to the map
myMap.set("bar", "foo");
myMap.set(1, "foobar");
// Update an element in the map
myMap.set("bar", "baz");
Using the set() with chaining
Since the set() method returns back the same Map object, you can chain the
method call like below:
// Add new elements to the map with chaining.
myMap.set("bar", "foo").set(1, "foobar").set(2, "baz");