Description map() creates a new array from calling a function for every array element. map() does not execute the function for empty elements. map() does not change the original array.

Dec 8, 2025 · The Map object holds key-value pairs and remembers the original insertion order of the keys. Any value (both objects and primitive values) may be used as either a key or a value.

Sep 23, 2025 · A JavaScript Map holds key-value pairs and similar to Hash Map or Dictionary in other languages. Preserves the original insertion order. Supports any type, including objects and …

This tutorial shows you how to use the JavaScript Array map () method to transform elements in an array based on a provided function.

Nov 6, 2025 · Learn how to use the .map () method in JavaScript to iterate over arrays and return transformed results. Includes syntax, examples, and best practices.

Feb 15, 2024 · JavaScript's map method, introduced in ECMAScript 5, is a fundamental tool for array manipulation and transformation. This method is versatile and simple, and has become a staple in …

In this tutorial, we will learn about the JavaScript Array map () method with the help of examples. In this article, you will learn about the map () method of Array with the help of examples.