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.

How to Create a Map. You can create a JavaScript Map by: Passing an Array to new Map() Create a Map and use Map.set()

The new Map() Method. You can create a map by passing an array to the new Map() constructor:

map.keys() is an ECMAScript6 (ES6) feature. ES6 (JavaScript 2015) is supported in all modern browsers since June 2017:

This tutorial is about the Google Maps API (Application Programming Interface). An API is a set of methods and tools that can be used for building software applications. Google Maps in HTML

This page has demonstrated how to show a user's position on a map. Geolocation is also very useful for location-specific information, like: Up-to-date local information

Learn more about Map objects, and the difference between a Map and an Array, in the the chapter: JavaScript Maps.

Sometimes the behavior of regular functions is what you want, if not, use arrow functions. Browser Support The following table defines the first browser versions with full support for Arrow …

Use the HTML <map> element to define an image map; Use the HTML <area> element to define the clickable areas in the image map; Use the HTML usemap attribute of the <img> element to …

The usemap attribute specifies an image (or an object) as an image map (an image map is an image with clickable areas). The usemap attribute is associated with a <map> element's name …