A Javascript map is a collection of elements where each element is stored as a Key, value pair. Map objects can hold both objects and primitive values as either key or value. When we iterate over the map object it returns the key, and value pair in the same order as inserted.

Javascript Map Programming Examples

Syntax:

let map = new Map([iterable]);

Parameter: It is any iterable object whose values are stored as a key, or value pair, If the parameter is not specified then a new map is created as Empty.

Example: Here is the basic example of a Javascript Map.

let map1 = new Map([
    ["firstname", "Rohit"],
    ["lastname", "Sharma"],
    ["website", "horje"]
]);

console.log(map1);

Output:

Map(3) {'firstname' => 'Rohit', 
        'lastname' => 'Sharma', 
        'website' => 'horje'}

All the JavaScript map articles categoriez into three sections based on their difficulty levels: Easy, Medium, and Hard. This organization aims to help learners gradually progress from basic to more complex concepts.

Easy:

The Easy level includes articles that cover fundamental operations and straightforward tasks with JavaScript Maps.

• How to iterate over Map elements in JavaScript
• How to add a key-value pair to Map in JavaScript
• How to get the value by a key in JavaScript Map
• How to create an empty Map in JavaScript
• How to check the size of a JavaScript Map
• JavaScript program to update the value for a specific key in Map
• JavaScript program to get key by value in a Map
• How to convert Map keys to an array in JavaScript
• How to convert a Map to JSON string in JavaScript
• How to convert a Map to array of objects in JavaScript
• How to convert Map to JSON in JavaScript
• Map to array in JavaScript
• How to serialize a Map in JavaScript

Medium:

The Medium level includes articles that delve deeper into working with JavaScript Maps, exploring more advanced operations and integrations with other data structures:

• How to convert an array of objects to a Map in JavaScript
• How to sort a Map in JavaScript
• JavaScript program to split Map keys and values into separate arrays
• How to convert a Map to Set in JavaScript
• How to convert a Set to Map in JavaScript
• How to call the map method only if the element is an array
• JavaScript program to combine values of two Maps having same key
• How to convert a plain object into ES6 Map using JavaScript

Hard:

The Hard level includes articles that cover more intricate and less common tasks

• How to recursively map object in JavaScript
• How to compute the average of an array after mapping each element to a value in JavaScript
• How to map array values without using map() method in JavaScript
• How are elements ordered in a Map in JavaScript
• How to convert Map to array in JavaScript

We have a complete list of Javascript Map Programming, to check those, please go through this Javascript Map Complete Reference article.

We have created a complete JavaScript Tutorial to help both beginners and experienced professionals. Please check this JavaScript Tutorial to get the complete content from basic syntax and data types to advanced topics such as object-oriented programming and DOM manipulation.

We have created an article on JavaScript Examples and added a list of questions based on Array, Object, Function, …, etc. Please visit this JavaScript Examples to get a complete questions-based articles list of JavaScript.

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