JavaScript Coding Challenges for JS Junkies

Being a JavaScript coder is a little like being a gunslinger: there’s always going to be someone younger or faster coming for you. That’s why you’ve got to keep your senses sharp and your mind open. You have to keep practicing and learning to stay on top of any profession, be it shooting challengers or squashing software bugs. 

Many online JavaScript courses have built-in challenges to address this need. These sites offer byte-sized coding puzzles, usually with increasing difficulty. Regular visits to sites like these will raise your coding game and make you a more valuable employee. Which JavaScript coding challenge sites are the best, though?

We’ve compiled the best coding challenges for JavaScript in this guide. You’ll discover which sites offer coding challenges for beginners and which ones are for more experienced programmers. With our help and a regular time commitment on your part, you’ll soon be a Java-coding beast.

Best Sites for JavaScript Coding Challenges

Exercism.io

Exercism.io is a growing platform designed to help people increase their JavaScript and other coding skills with tests and challenges. The program offers challenges for 51 languages and is entirely free-of-charge. As of now, over 50,000 students used the JavaScript challenges offered by Exorcism.io.

Additionally, the program features 101 JavaScript exercises and challenges, as well as 117 coding mentors. Mentors at Exorcism.io are seasoned JavaScript developers, and they’re available for students when needed to help solve challenging computer programming problems.

TopCoder

If you want a time-tested JavaScript coding challenge site, look no further than TopCoder. This coding challenge site offers new challenges every week. What’s more, it has a vast archive of challenges in which you can play to your heart’s delight.

If you’re feeling cocky, you can also take advantage of TopCoder’s single-round matches that pit you against another coding competitor. Put your skills on the line with this well-crafted and respected challenge site and push through to the next level.

SPOJ

SPOJ, or Sphere Online Judge, is a multifaceted coding platform for students. With over 700,000 users and 25,000,000 submissions, SPOJ offers a huge base of knowledge to anyone willing to look. 

Students learn popular coding languages (including JavaScript) using the vast amount of resources offered by the program. To get started, simply visit the SPOJ ‘Problems’ page on the website and scroll through thousands of projects. Each coding challenge is labeled by difficulty, quality, and views. Thus, you can be confident that you’ll find all the resources you need, from beginner coding challenges to more difficult projects.  

Scotch.io

Scotch.io offers a challenging but rewarding JavaScript coding challenge. In this challenge, you’ll build an online chat app from the ground up using Laravel and Vue.js. This high-level chat application features user authentication (username and password), saves registration information in a database, and allows users to participate in a variety of chats.

The program features group chats, one-on-one conversations, typing indicators, read and delivered receipts, and more. This JavaScript project allows you to build a fun and complex front end without an unreasonable amount of difficult material.

Codewars

Codewars offers a variety of JavaScript challenges designed to test different areas of expertise, including combined with other programming languages.  The simplest project available is called ‘Polish Alphabet’ and is JavaScript-only. Codewars challenges you to change a group of letters into a word using diacritics. 

Other projects such as the ‘Logical Calculator’ include other programming languages such as C#, Python, Racket, and Ruby. For simpler projects, consider the age differences challenge. The challenge requires you to find the age differences between your youngest and oldest family members using JavaScript and C#. As of now, Codewars offers a total of 9 JavaScript and Python coding challenges.

HackerRank

Up next, HackerRank is a great choice for JavaScript coding challenges. The website provides visitors with challenges that span across a variety of domains, including functional programming, mathematics, AI, and algorithms. In addition to JavaScript, HackerRank has challenges for many other languages, too.

A great feature of HackerRank’s is how integrated they are with prospective employers. On HackerRank, you can create a resume to be viewed by companies, and you can take on coding challenges provided by businesses. Do well on the problem and you might find yourself in a job interview!

LeetCode

LeetCode is an online platform designed to help people learn how to code. JavaScript is one amongst many languages served by LeetCode, and the service offers plenty of related resources.

In addition to coding questions and challenges, LeetCode helps you engage in an active community of peers. Students help each other solve coding problems by providing examples and exchanging ideas. LeetCode also helps students connect with companies and can help you prepare for a technical interview with coding challenges.

CodinGame

CodinGame offers a unique approach to JavaScript coding challenges (and more than 20 other programming languages). Each challenge is connected to a real in-browser game that responds to your input in the browser-based IDE. The site also offers tutorials and the ability to partake in competitive and multiplayer coding challenges.

There are tons of different games you can work on in CodinGame, but some of the most popular games on the site include The Descent (to practice JavaScript loops), Power of Thor (to practice conditions), and Temperatures (to practice arrays).

While CodinGame offers plenty of JavaScript challenges for beginners, there are plenty of great exercises to test more experienced coders, as well.

Geeks4Geeks

Geeks4Geeks provides a number of JavaScript coding resources to programmers. Among these resources are coding challenges which you can use to prepare for a technical interview.

Additionally, Geeks4Geeks provides helpful blog content covering company-specific technical interview topics. You can use this information to get a head-start on programming and pick the challenges that best relate to your prospective company. Geeks4Geeks offers quality computer science resources that you can take advantage of today and begin testing your JavaScript programming skills.

CoderByte

For those of you who are still getting their JavaScript feet wet, CoderByte is the place to visit. CoderByte presents its JavaScript coding challenges in an escalating fashion; you start out with beginner challenges and work your way to the more difficult ones. The site has a bunch of helpful videos and articles explaining various coding concepts, as well.

CoderByte will not only let you hone your JavaScript coding skills, but it will also help you get placed in a coding bootcamp. The site offers bootcamp test prep exams in addition to its coding challenges. Worth a visit!

CodeForces

CodeForces offers a myriad of programming tests, competitions, and practice projects. Each time CodeForces holds a contest, it displays the participants on its ‘Contests Page’ and describes the project. Challenges also include a countdown, allowing you to see when it began and how much time you have.

CodeForces offers a unique coding challenge platform that allows students to get in touch with their competitive side, while simultaneously focusing on relevant and up-to-date skills. Also, you can practice JavaScript and access study materials on the site, making it a well-rounded and feature-filled coding practice platform.

CodeChef

Are you looking for a boundless cornucopia of coding challenges? Take a web stroll over to CodeChef. CodeChef is based in India, and it taps that country’s substantial programmer base to offer a whole heapin’ helpin’ of coding challenges.

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Find Your Bootcamp Match

Go solo, or fight it out with other JavaScript writers in a competitive challenge. And, make sure to take advantage of CodeChef’s best feature: its vibrant and active forums and tutorials. Tap into expert coders’ knowledge on the websites message boards, and enlist others to aid your development.

With such a profusion of JavaScript coding challenge sites around, it’s essential to know where to go and not waste your time on misleading or poorly built challenge sites. We hope that this guide has helped you weed out some of those and has allowed you to concentrate on those sites that bring it regularly and thoroughly. Keep hitting the challenges and soon you’ll be a big-league JavaScript player.

Project Euler

Project Euler offers a series of complex computer programming challenges, along with math testing and practice problems. The site offers challenges of varying difficulty, so people from all coding backgrounds can find something that fits their skill levels. You can set up an account and track your progress as you continue to learn, and gradually select challenges of increased difficulty.

Project Euler aims to help programming students increase their skills by slowly challenging themselves to unfamiliar coding problems while remaining (mostly) within their comfort zone.

JavaScript Coding Challenges List

• Exercism.io
• TopCoder
• SPOJ
• Scotch.io
• Codewars
• HackerRank
• LeetCode
• CodinGame
• Geeks4Geeks
• CoderByte
• CodeForces
• CodeChef
• Project Euler