Webtips

JavaScript

JavaScript is one of the world's most popular programming languages that powers every website on the web, including this page you are looking at right now. It allows you to create interactive and dynamic web applications without the need for extra installation steps. This means that you only need a browser to start using JavaScript.

It can be used for a variety of tasks, whether it is simple things such as manipulating form elements or building complex 3D experiences, JavaScript can do it right in your browser.

Both examples are built using JavaScript

Why Should I Learn JavaScript?

Still, the question remains: why should I care about learning JavaScript? What's in it for me? Here are five reasons to help you decide whether you should invest your time in learning JavaScript:

Did you know? — JavaScript was originally called Mocha, then LiveScript.

Show Me How JavaScript Works

Let's take a look at a simple example to see how we can use JavaScript. Suppose we have a dashboard where users can change their email, and we want to reflect the change in real-time. This can be achieved using the following code:

Copied to clipboard! Playground 
const textInput = document.getElementById('text-input')
const inputValue = document.getElementById('input-value')

textInput.addEventListener('keyup', event => {
    inputValue.innerText = event.target.value
})
username ([email protected])

Change the value inside the input to see the change reflected by JavaScript. Let's break down each line to understand what is going on:

Where Should I Start?

If you are new to JavaScript, you should start with the basics. First, you need to familiarize yourself with the available data types in JavaScript. Next, you should start working with variables and then move on to functions. Once you are familiar with the basics, you can dive deeper into how arrays and objects work. Make sure you understand how the this keyword works in JavaScript.

JavaScript is asynchronous in nature, and many times you will need to communicate with servers. This can be achieved through the use of promises. At this point, you should start learning how to work with web APIs such as the DOM. We also have a roadmap that guides you through everything you need to know about JavaScript.

Master JavaScript
JavaScript RoadmapLearn JavaScript with our guided roadmapThis roadmap covers and takes you through the essential concepts in JavaScript, from basic syntax to more advanced concepts like functional and asynchronous programming.

Here are some interview questions that can help you get a better understanding of JavaScript, as well as a collection of smaller JavaScript tips and tricks. Additionally, you can filter for JavaScript-related tutorials on our search page.

Last but not least, you can find all of our latest JavaScript tutorials below. Use the filters on the sidebar if you would like to narrow down the results. I wish you good luck with learning JavaScript!

Keep on coding! 👨‍💻

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