Through Node.js, JavaScript lets developers build web servers and back-end infrastructure, saving you time and effort in web server creation. Meanwhile, mobile application development frameworks such as Cordova and Titanium make it possible to create native or hybrid applications. For collections, avoid adding the type such as list, array, queue in the name. For example, for an array of cars, use cars and not carArray or carList. There may be exceptions, like when you want to show the abstract form of a feature without the context of a particular application. Above code will set the variable arrayList to a new empty array.

The DotEnv VS Code extension adds syntax highlight to .env variables. So having syntax highlight on these files makes me less prone to mistakes and allows me to read the environment variables a lot quicker compared to a file with only grey text. In addition to the live view, our JavaScript Compiler offers a rich library of resources to help you level up your coding skills. With comprehensive documentation, video tutorials, and a thriving community of developers, you’ll never feel lost or unsupported.

Chrome Debugger for VS Code

The pro option gets you features like website deployment, custom domains, unlimited free lines of code, and many more. It also has a simple tool for quick prototyping and viewing the result of coding. Codedamn uses the Monaco editor, the lightweight version of VS Code that makes it very fast and efficient. It also provides access to popular frameworks like Nextjs and Reactjs. However, Codedamn playgrounds are recently released and don’t have a large community.

Best JavaScript Examples You Must Try

It can be used for both Client-side as well as Server-side developments. JavaScript also known as a scripting language for web pages. Here are a few more unique features of javascript; these features are handy for professional developers and assist in writing idiomatic code. In those cases, you need a transpiler like Babel to run them.

Arrow Function Example

Since the variable i does not have block-scope, it’s value within all three functions was updated with the loop counter and created malicious values. Closures can help us solve this issue by creating a snapshot of the environment the function was in when it was created, preserving its state. While coding the timer, you’ll familiarize yourself with JavaScript functions and time-bound events. You’ll also learn how to write JavaScript code for basic math conversions to handle different time parameters. It’s difficult to give an exact number, as new JavaScript frameworks are constantly being developed and released.

JavaScript makes it easy to develop a Tic-Tac-Toe game yourself. You can look at the entire code here, and it explains how to build a 3×3 tic-tac-toe step by step. Then, you can later expand to NxN for your own practice and knowledge.

File Sharing App

You’ll start writing modern JavaScript and really understand why we need ES6. Mastering modern JavaScript starts with understanding the reasoning behind the main ES6 features — arrow functions, variables, template literals. Doing so will help you grasp js development the concepts behind Node, React, and Angular. PHP – a server-side language commonly seen in PHP-based content management systems like WordPress. Its main goals is to transfer information to and from a database, assemble HTML files, and track sessions.

Best JavaScript Examples You Must Try

All the courses are excellent if you connect with an instructor, then you will make most of them. You will not only learn how JavaScript works and it’s fundamental concepts but also learn how to write solid, good JavaScript code. The course also touches advanced JavaScript concepts such as closures, prototypal inheritance, IIFEs, and much more.


You’ll find more on DOM best practices in the next section. You will come across the term “associative array” in some tutorials. This is a misnomer as arrays with named properties rather than an index are actually objects and should be defined as such. Clean and valid code means less confusing bugs to fix, easier handover to other developers and better code security.

Best JavaScript Examples You Must Try

This article is a list of rules for writing concise examples that will be understandable by as many people as possible. Go to your test site and create a new folder named scripts. Within the scripts folder, create a new text document called main.js, and save it.

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In this example, we won’t be able to access balance from anywhere outside of the bankAccount function, which means we’ve just created a private variable. So one use case of symbols is that you can add something to an object you might not own, and you might not want to collide with any other keys of object. Therefore, creating a new one and adding it as a property to that object using symbol is the safest.

Use short identifiers, and avoid non-common abbreviations. Good variable names are usually between 3 to 10-character long, but as a hint only. For example, accelerometer is more descriptive than abbreviating to acclmtr for the sake of character length. This section lists our recommendations of which operators to use and when. Do not use for (;;) — not only do you have to add an extra index, i, but you also have to track the length of the array.

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