JavaScript Map forEach()
Map.forEach()
The forEach() method invokes a callback for each key/value pair in a Map:
Example
// 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 »
Description
The forEach() method invokes a function for each map element:
The forEach() method does not change the original map.
Syntax
map.forEach(callback)
Parameters
| Parameter | Description |
| callback | Required. A function to execute for each element. |
Return Value
| NONE |
Browser Support
set.forEach() is an ECMAScript6 (ES6) feature.
ES6 (JavaScript 2015) is supported in all modern browsers since June 2017:
| Chrome 51 | Edge 15 | Firefox 54 | Safari 10 | Opera 38 |
| May 2016 | Apr 2017 | Jun 2017 | Sep 2016 | Jun 2016 |
set.forEach() is not supported in Internet Explorer.
