What is JavaScript used for? Analysis and Modern Uses

JavaScript is the most popular programming language used on the web. One of the things that makes it very unique is the fact that it runs directly in your browsers.

Most programming languages for the web run on a server and then what you get in a browser is a plain webpage. JavaScript is actually run by individual browsers and that makes it quite unique in the world of programming languages.

This is a question that we get asked frequently and in this post we will be shedding light on the modern uses of JavaScript.

What is JavaScript used for?

Try this one out yourselves. Go to Javascript.com and type your name in quotes in the space that tells you to try JavaScript and hit enter.

You’ll see when you do that, the space will turn green, a check mark would appear on the left and a button appears that says “Next Challenge”

You’ll notice that your browser did not go out to the server to get all that information. It just did it right here. That is unique isn’t it?

So what can JavaScript do for us?

There’s lots and lots of great things that JavaScript is able to do. It is really good at providing interactivity. Real-time content updates is another good example.

Here is a list of some other things that JavaScript can do for you. This list also determines the merits of JavaScript.

  • JavaScript is an easy programming language to integrate and implement. All you have to do is create an HTML document with all the code and tell the browser that it is JavaScript.
  • JavaScript also works offline on the user’s computer.
  • JavaScript is an extremely proficient programming language that enables programmers to create high quality responsive interfaces with dynamic functionality. This improves the user experience and decreases coding time as you don’t have to wait for the server to show another page.
  • Real-time content updates let you load content into a document without loading the entire page (commonly known as Ajax)
  • JavaScript works on the concept of defensive scripting whereby it always tests the capability of the browser and reacts accordingly.
  • JavaScript is great at fixing problems in web browsers and proving browser support.

Some of the downsides of JavaScript

Despite seeing a lot of improvements, JavaScript is often laughed at by programmers that favour ‘Higher programming languages”. This is due to flakiness, not of the language, but the environment that it is implemented in.

JavaScript often runs into multithreading issues. If a computer is running multiple tasks or has JavaScript running in another tab in the browser, it will significantly slow down.

This will always remain an issue until browsers have different threads for different tabs and windows. Web workers, which is a new HTML5 feature, provides some multithreading support to browsers but still a better solution will be more than welcome.

Another frequent problem that JavaScript experiences is being constantly turned off in browsers owing to security concerns.

JavaScript can be used to create something that annoys people rather than enhancing their user experience. An example of this are pop-up ads that still show up even if you have them disabled or ads that cover your content until you click a link.

What is JavaScript used for in websites?

Much like the language itself, the usage of JavaScript has evolved throughout the years. Previously, it was used on a website for interacting with forms, giving and receiving feedback from the user, and monitoring user activity on the website or a form.

Feedback was given to the user in the form of the alert() function. The prompt() function was used as a way to get user input, and other functions like confirm() were used to understand user decisions. Additionally, the function document.write() was used to add content to a document.

Most of these functions were neither pretty nor subtle. They caused quite a few errors and soon became redundant. These days we have found new and better uses for JavaScript that utilise the language’s true potential.

If you want to increase your website functionality, Make use of our web development services to enhance your site’s user experience.

What is JavaScript used for – Modern uses

JavaScript in the current day and age is increasingly being used for complex web development tasks and beyond. Here are a few of these uses:

Front-End Development

JavaScript can be used to create highly interactive and dynamic web pages. It is commonly used with HTML and CSS, which is a combination that greatly enhances functionality and user experience.

Web Pages that are made with JavaScript have the ability to dynamically update themselves when responding to user queries without the need to reload. Such a functionality is not achievable if you are using HTML or CSS alone.

Back-End Development

Node, that is a JavaScript environment independent of a web browser, has been able to contribute a lot towards increasing the performance of the backend as well as the frontend.

Node has seen huge popularity in recent years and programmers consider it to be one of the top choices when building backends. This is very advantageous as Node operates on the same base language as many front-ends i.e JavaScript

This also enables developers to contribute, share and reuse code while also managing full-stack projects using a single stack manager.

Building Web Apps

React Native and Angular are two frameworks that use JavaScript to expertly create web apps. Developers extensively use JavaScript to add interactive features to web apps.

Moreover, almost every internet browser uses JavaScript to dynamically display content on web pages that adds to the attractiveness of the page.

Mobile App Development

JavaScript is one of the most preferred languages for creating mobile apps along with HTML and CSS. React Native is one of the most popular frameworks, developed by Facebook, that uses JavaScript to create progressive mobile apps for Android and IOS.

Are you looking to develop a mobile app for your business? If that is the case, then try out our mobile development services.

Machine Learning

It is a common practice among developers these days to write machine learning algorithms using common web-scripting languages. TensorFlow.js and MI.js are very popular JavaScript libraries in this regard.

The majority of the machine learning algorithms that are made these days to train in using programming thatincludes JavaScript.

Deep Learning

Brain.js and Deeplearn.js are two deep learning frameworks that train our web browsers to remember user preferences, activities etc. Researchers have been using JavaScript as the core language for developing deep learning algorithms and techniques.

Final words

As with any programming language, it is difficult to say what the future holds for JavaScript. For now, it has become an integral part of creating interactive and complex experiences in applications.

Tell us your thoughts on this post. Were we able to answer what is JavaScript used for?

Also, if you are looking for web development services, give us a call.

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