JavaScript Map forEach()

Definition and usage

forEach() The method calls a function for each element in the Map:

forEach() The method does not change the original Map.

Instance

forEach() Calls a callback function for each key/value pair in the Map:

// Create a Map
const fruits = new Map([
  ["apples", 500],
  ["bananas", 300],
  ["oranges", 200]
});
// List all entries
let text = "";
fruits.forEach(function(value, key) {
  text += key + ' = ' + value;
});

Try it yourself

Syntax

map.forEach(callback)

Parameter

Return value

None.

Browser support

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

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

set.forEach() Not Supported in Internet Explorer.