Learning Guide | TypeScript VS JavaScript

Nowadays, websites are thoroughly used by all companies and JavaScript is leading top to improving HTML-oriented pages. While JavaScript is widespread, it’s overt that TypeScript is also gaining popularity. TypeScript is a modified version of JavaScript with some added traits. These programming languages are exercised, however, TypeScript is speedily becoming the most preferable. As developers and web development companies are turning their heads towards TypeScript, so it’s significant to know their difference. Let’s understand what TypeScript VS JavaScript has to offer.

Typescript

Developed by Microsoft, TypeScript is an open-source, object-oriented programming language. Certainly, it is an intense syntactical superset of JavaScript and improves elective static typing in the language. TypeScript mainly plans for building bug applications and then trans-compiles them to JavaScript.

Also Read | How To Use Typescript With React

The current JavaScript programs are also acceptable TypeScript programs. However, to make JavaScript applications for client and server-side execution, you can use TypeScript. There are many choices available for trans-compilation. Further, you can use the default TypeScipt checker or treat the Babel compiler to change TypeScript to JavaScript.

TypeScript uses those files that have type data of current JavaScript libraries. It is like C++ header files defining the building of present object files. So, this makes other programs perform on those values present in files as if they were statically typed TypeScript entities.

Besides, there are third-party header files for widespread libraries like MongoDB, D3.js, and jQuery. However, you can access TypeScript headers for Node.js elementary modules. Moreover, Node.js development programs have a permit within JavaScript.

TypeScript compiler is written in TypeScript only and assembled in JavaScript. However, it is the first-class language in Microsoft Visual Studio 2013 Update 2 and is registered under Apache License 2.0. In addition, there was an official extension sanctioned by Visual Studio 2012 to maintain TypeScript. Ander Hejlsberg is the leading architect of C# and inventor of Turbo Pascal and Delphi. Moreover, he has operated on the making of TypeScript.

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Why do we use Typescript?

You will find many reasons that define what is the use of TypeScript. The following are the reasons:

• Static Typing – JavaScript is a strongly written general-purpose programming language. It does not identify what type of a variable is until it is necessarily instantiated at runtime. Moreover, TypeScript is an added trait and provides type support to JavaScript.
• Adding Features of ECMAScript – TypeScript helps novel ECMAScript standards trans-piling them to ECMAScript goals of your choice. Furthermore, you can also utilize some features of ES2015. Also more like modules, spread operators, classes, lambda, de-structuring, etc.
• Improved IDE support – TypeScript has a development practice that is an improvement over JavaScript. With several ranges of IDEs, you get good support for Typescripts like Visual-Studio, Atom, Sublime, IntelliJ, or VS Code.

• Type Inference – It seems easy to type in TypeScript and less clear by the type inference practice. So, if you decide to not type the types, you will find them putting you from doing things resulting in a runtime error.
• Interoperability – TypeScript connects JavaScript and has great interoperability proficiencies. However, it demands some more work to operate with JavaScript libraries in TypeScript.
• Strict Null Examination – There are errors like cannot to read property ‘x’ of undefined, which is basic in JavaScript software programming. You can delete these errors as one cannot use a variable not known to the TypeScript compiler.

Javascript

Developed by Netscape in 1995, JavaScript is a client-side scripting language. One can also use it as a server-side language by using Node.js. We call it a scripting language because it does not require compilation before execution.

During runtime, every command or line is interpreted and programs written in JavaScript are Scripts. Browsers support these scripts and execute and interpret them directly. You can make dynamic web pages in JavaScript.

Let’s say one can do animated graphics, display the latest news update, change content without reloading issues, etc. However, the above features are accessible under JavaScript usage. Also, you can embed these scripts simultaneously within HTML pages that browsers can interpret.

JavaScript is a multi-paradigm programming language, thereby it backs imperative, functional, and event-driven styles. In one of our previous blogs on the JS frameworks, Vuejs vs Reactjs, it is clear that Vue uses HTML templates, however, there is a choice to transcribe in JSX. Moreover, React merely employs JSX.

Why use JavaScript?

Nowadays, JavaScript is in high demand as earlier it was usable for web apps and browsers. It came into more deep usage beyond the web in software, hardware controls, and servers. So, the following are the basic aspects defining what is the use of JavaScript:

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• Interactive and Fun Language – It has a comprehensive user interface that you can apply. JavaScript has a graphical UI that is easy and interactive to deploy. The user can easily write codes that will operate in the browser. This way it will build fun projects swiftly in the learning process.
• Low Threshold to Begin With – Browsers use this programming language and it’s easy, to begin with, and comprehend. So, there is no need for other programs to install before you start.

• Higher Debugging Tools – There is a JavaScript interpreter built into the web browser. Besides, it allows you to search and get good feedback helping you to learn faster.
• The basis for Learning Programming Styles – JavaScript backs the event-driven software design style, where there is an organized movement of your code by user or system events. This kind of programming is fully indispensable for building user interfaces. Moreover, it is a much more cooperative paradigm for scheming scalable server-side systems.
• Robust Learning Support – Every browser has a source code with features allowing one to learn from others’ live coding. You can also get a dynamic repository of library code in the ecosphere of JavaScript. There are supportive people in the JavaScript community and active in sharing codes.
• Rich interfaces – JavaScript is brilliant to get things like drag-and-drop components or sliders. Also, it helps to give a good interface to your website visitors.

Comparison of TypeScript vs JavaScript

We notice while comparing the two that TypeScript is an open-source language and an extended version of JavaScript. It’s a superset of JavaScript, which is a lightweight interpreter software design language.

Also, it does not involve any multithreading or multiprocessing capabilities. Below, you will learn the significant differences between these two languages.

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Code Comparison TypeScript vs JavaScript

Following is a small code snippet that shows how code looks in JavaScript and how to write the same code in TypeScript.

TypeScript

class App {
  demoFunction() {
    console.log("Hello world");
  }
}
let fun = new App();
fun.demoFunction();

JavaScript

 var App = / **
 	@class * / (function () {

 function App() {}
 App.prototype.demoFunction =
 	function() {
 		console.log(Hello world ");
 	};
 return App;
 }());
 var fun = new App();
 func.demoFunction();

Wrapping Up

In this tutorial, we have explained features as well as the differences between TypeScript and JavaScript. We have mentioned a small code example regarding these languages. Now, we can say, it both has benefits and flaws. JavaScript may not seem like a comprehensive coding language, yet one can apply it to HTML to improve web page quality. Further, it arrives in the environment of a developer’s browser.

TypeScript assembles into JS code, which we can use wherever JS is appropriate. In addition, TypeScript provides extra features, and it is usable by a wider audience. Also, there are new improvements visible and turning it safer for a better future.

In case you are baffle about what to apply, JavaScript or TypeScript, contact our Codersera team of developers. We help you to develop a strong web application. We hope that you would find this tutorial helpful and it would have been useful to you in understanding the difference between TypeScript and JavaScript.

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