Head-to-Head Comparison of Typescript and JavaScript

Basic difference between JavaScript and typescript

For their next project, many coders, both experienced and new, wonder whether they should continue with JavaScript or switch to TypeScript. If you’re just starting, you’ll undoubtedly want to know where you should concentrate your efforts. We’ll look at the distinctions between these two programming languages, as well as their benefits and uses, in the sections below.


Microsoft created and maintains TypeScript, open-source, an object-oriented, programming language. It’s a syntactical specialized version of JavaScript that adds optional static typing to the language.

The typeScript was created by Anders Hejlsberg. It was originally made available to the general public on October 1, 2012. The new version of TypeScript 0.9 was published in 2013 after two years of internal development at Microsoft. TypeScript 3.4.5, which was released on April 24, 2019, is the most recent version. TypeScript (TS) is a large-scale programming language that compiles JavaScript.

TypeScript can be used to create JavaScript apps that run on both the server and the client. The most popular JavaScript programs are TypeScript programs as well. There are numerous trans-compilation options available. You can use either the default TypeScript Checker or the Babel compiler to convert TypeScript to JavaScript.

Similar to how C++ header files specify the building of current object files, TypeScript provides files that can provide type data from current JavaScript libraries. This allows other applications to use the values defined in files as if they were TypeScript entities with statically typed values.

For popular libraries like D3.js, jQuery, and MongoDB, third-party header files are available. TypeScript headers for Node.js basic modules are also available, allowing Node.js apps to be written in TypeScript. The TypeScript compiler is composed of TypeScript and JavaScript. It’s licensed under the Apache License 2.0.


JavaScript, abbreviated as JS, is a scripting language that adheres to the ECMAScript standard. JavaScript is a high-level, multi-pattern, just-in-time compiled language. It is the number one programming language to start your career.

First-class functions, curly bracket syntax, dynamic typing, and prototype-based object orientation are all included. JavaScript, along with CSS and HTML, is one of the most important technologies on the Internet. You can read our blog, which creates a list of the finest JavaScript-based websites.

JavaScript is a programming language that enables interactive website pages and is an essential component of web applications. The majority of websites use it for client-side website page behavior, and all major web browsers include a dedicated JavaScript engine.

JavaScript is a multi-paradigm programming language that supports event-driven, imperative, and functional programming paradigms. Text, Dates, standard data structures, the Document Object Model (DOM), and regular expressions can all be calculated using the application programming interface (API).

Previously, JavaScript engines were primarily used in web browsers, but they are now used on a variety of servers, most commonly via Node.js. CoffeeScript, Dart, TypeScript, and Kotlin are examples of JavaScript derivatives. These are also used in a variety of apps created with frameworks like Electron and Cordova.

TypeScript has the following advantages over JavaScript:

  • In contrast to JavaScript, TypeScript provides highly typed or static typing.
  • TypeScript works in any browser that supports JavaScript.
  • Excellent tooling, including IntelliSense, which delivers active hints as code is entered.
  • By defining a module, it has a namespace idea.

TypeScript has a disadvantage over JavaScript:

  • Compiling TypeScript code takes a lengthy time.
  • Abstract classes are not supported by TypeScript.
  • If we execute the TypeScript program in the browser, we’ll need to compile it first to convert it to JavaScript.

Head-to-Head Comparison of Typescript and JavaScript

There are several similarities between Typescript and JavaScript. Both of these techniques are used to generate interactive web pages.

However, when comparing JavaScript vs. Typescript for web design, JavaScript is an interpreter, lightweight, dynamic language. It is used to enhance HTML web pages in web application development. Typescript, on the other hand, is a specialized version of JavaScript. Typescript is defined as JavaScript with a few more characteristics.

The table below compares JavaScript with Typescript to show the key differences in the two languages.

1.Strongly typed or static types are not supported.  It has a feature that allows either highly typed or static typing.  
2.It was created by Netscape in 1995.  It was created in 2012 by Anders Hejlsberg.  
3.The “.js” extension refers to the JavaScript source file.  The “.ts” extension refers to the TypeScript source file.  
4.It’s a browser-based application.  It is not a browser-based application.  
5.It’s nothing more than a scripting language.  Classes, inheritance, interfaces, generics, and other object-oriented programming concepts are supported.  
6.Optional parameters are not supported.  Optional arguments are supported.  
7.Because it is an interpreted language, the mistakes were noted during runtime.  During development, it generates the code and highlights errors.  
8.Modules are not supported by JavaScript.  Modules are supported by TypeScript.  
9.The items in this are number and string.  The interfaces are number and string in this case.  
10.Generics are not supported by JavaScript.  Generics are supported by TypeScript.  
11.Example: <script> function addNumbers(a, b) {      return a + b;  }   var sum = addNumbers(15, 25);  document.write(‘Sum of the numbers is: ‘ + sum); </script>  Example: function addNumbers(a, b) {      return a + b;  }  var sum = addNumbers(15, 25);  console.log(‘Sum of the numbers is: ‘ + sum);  


JavaScript is an excellent programming language; otherwise, it would not have stayed the most successful for so long. That does not, however, imply that it is flawless (does a flawless programming language even present?). In JavaScript, things can get chaotic and difficult when dealing with larger projects. As a result, Microsoft created TypeScript.

TypeScript is essentially JavaScript with the addition of scalability. The major distinction between TypeScript and JavaScript is that TypeScript is tightly typed, whereas JavaScript is not. Furthermore, unlike JS, TS was created to handle larger projects, and this is due to three key factors:

  • Refactoring code is easier;
  • Uses compile-time verification to find faults and errors;
  • Explicit type.

Is one superior to the other? For smaller projects, TypeScript is usually not worth the effort; consequently, JavaScript is probably preferable. Yes, TypeScript is better and more effective for larger projects.