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Typescript vs JavaScript: Understand the Top Difference in Detail

Home » Blogs » Typescript vs JavaScript: Understand the Top Difference in Detail

You are going to learn the Typescript vs JavaScript analysis and know which one is suitable for your next web development process.

JavaScript is widely used on the internet. JavaScript has been on the market for many years and has grown to be a popular programming language among developers. It has served as the gateway programming language for many as the most popular scripting language for many online applications. However, it is not the only one of its sort. With TypeScript’s growing popularity, we may consider it an upgraded version of JavaScript with more functionality.

The majority of large applications are suitable for TypeScript, an open-source programming language– the main difference between Typescript and Javascript. Microsoft built it in 2012, primarily to manage large applications.

What is JavaScript?

What is JavaScript?

JavaScript, created by Netscape in partnership with Sun Microsystems, is one of the most ubiquitous fundamental web technologies. JavaScript is a scripting language for creating interactive web pages. It follows client-side programming standards, meaning it operates in the user’s web browser without requiring any resources from the webserver. It’s a high-level language with a JIT compiler and dynamic typing. For a long time, JS was solely used on the client-side, although several modern JS engines also feature server-side equivalents. The syntax of JS and the native libraries are both comparable to Java. JS is the greatest programming language to grasp as a beginner.

The goal of creating this script is to make it a supplementary scripting language in the same way that Visual Basic was to C++ in Microsoft’s language family. JavaScript was designed for apps with less than a few hundred code lines.

What is TypeScript?

What is typescript?TypeScript is a JavaScript programming language from the modern decade. All of your JavaScript code is valid in TypeScript, which implies TypeScript is a superset of JavaScript — it’s just JavaScript with extra capabilities. It is a dynamically built language for writing concise JavaScript code. When we examine Typescript vs Node.js, it may be executed on Node.js or any browser that endorses ECMAScript 3 or the latest versions.

TypeScript, like JavaScript, serves the same goal but is suited for building complex apps. JavaScript is compiled from TypeScript.It is structured as an object-oriented programming language and supports concepts such as interfaces, inheritances, namespaces, and classes.  Type annotations enable static typing in TypeScript.

TypeScript is a highly typed language. This allows for easier debugging, which is a far more effective method of coding for large projects. TypeScript programs, like any other full-fledged programming language, are made up of sections, features, variables, remarks, phrases, and statements. When the code gets large, difficult to manage, and prone to mistakes, this is where TypeScript comes in handy.

Difference between TypeScript and JavaScript

TypeScript is a JavaScript superset designed to reduce code complexity in large applications. Java is a programming language that aids in the creation of dynamic web page content. JavaScript is an object-oriented programming language, whereas TypeScript is a scripting language. Static typing is a TypeScript feature, however, JavaScript does not support it. TypeScript supports interfaces, while JavaScript does not. The powerful and user-friendly programming language for huge applications is TS vs JS is sleek and tidy, making it ideal for small web applications.

Why was Typescript developed despite having Javascript?

JavaScript is extended by TypeScript. It covers all JavaScript features as well as advanced features. The use of JavaScript practically everywhere necessitates the use of TypeScript. JavaScript is no longer restricted to the client-side; it is utilized practically everywhere, including outside of browsers. JavaScript is used by almost 90% of websites, mobile applications, and many other programs. However, when consumers began to utilize JavaScript, developers recognized that it could also be used as a server-side programming language. However, as JavaScript grew in popularity, the code got more intricate and complex. As a result, JavaScript was unable to meet the criterion of an Object-Oriented Programming language. This hampered JavaScript’s success as a server-side technology in the industry. To overcome this disparity, the development team built TypeScript. TypeScript provides immediate validation using type-checks and assists developers in ensuring that their code has no type-related mistakes. It saves time by giving more syntax, type checking, and excellent interaction with an editor.

TypeScript swiftly gained popularity and was used by a significant number of businesses. There are several resources for learning TypeScript, and developers may readily obtain help from the TypeScript community. It is not as huge as the JavaScript community. The present JavaScript ecosystem includes several platforms, modules, and code practices, rendering it one of the largest development communities.

Browsers cannot natively comprehend TypeScript code with top frontend frameworks. As a result, if the code was written in TypeScript, it is translated and transformed to JavaScript. This is referred to as trans-piled. Browsers can read and display the code with the aid of JavaScript code. Developers may employ TypeScript to reuse existing JavaScript code, include popular JavaScript libraries, or call the TS Code from native JavaScript code.

Features of JavaScript

Object-oriented programming support

As Java Script has a window object, Object Centered Language characteristics are incorporated into the object. The idea of class and OOPs has been improved since ES6. In addition, two essential OOP principles in JavaScript are Object Creation patterns (Encapsulation) and Code Reuse patterns (Inheritance). Although JavaScript developers seldom leverage this capability, it is available for anybody to use.

Client-side Validation

This is a feature that has been present in JavaScript for a long time and is still extensively utilized because every website has a structure in which users enter values, and in order to ensure that users enter the correct value, proper validations must be implemented on both the client-side and the server-side. Client-side validations are implemented using JavaScript.

More Browser control

As JavaScript is a client-side language, it has several capabilities that allow developers to partition work between the browser and the server, decreasing server load by having basic operations, validations, temporary data storing via cookies, and so on on the browser itself.

Prototype-based language

JavaScript is a programming language based on prototypes. This indicates that javascript uses prototypes rather than classes or inheritance. In programming languages such as Java, we construct a class and then objects for that class. However, with JavaScript, we establish an object prototype and then use this object prototype to build other objects.

Features of TypeScript


TypeScript is portable in the sense that it may be run on any browser, device, or operating system. It may be executed in any environment that supports JavaScript. Its execution is not limited to any virtual machine.


TypeScript is compatible with any platform that supports JavaScript. The TypeScript compiler is compatible with all operating systems, including Windows, macOS, and Linux.

JavaScript libraries

They are supported by TypeScript, as are all JavaScript components. It enables developers to utilize current JavaScript code in conjunction with TypeScript. We can simply use most of the JavaScript frameworks, modules, and other resources in this context.

Static type-checking is used in TypeScript

This is accomplished through the use of type annotations. It aids type checking during compilation. As a result, you may identify mistakes while typing the code rather than executing your script every time. Furthermore, if a variable is defined without a type, its type will be deduced depending on its value using the type inference method.

Typescript vs JavaScript: Why do you need TypeScript?

TypeScript is a free and open-source programming language that streamlines JavaScript code, allowing us to understand and debug. It offers extremely productive developer tools for JavaScript IDEs as well as techniques such as static checking. TypeScript simplifies the reading and understanding of code. With it, we can vastly improve on ordinary JavaScript. TypeScript provides all of the benefits of ES6, plus increased efficiency. By type verifying the code, TypeScript can help us avoid nasty problems that developers frequently encounter when creating JavaScript. It is little more than JavaScript with some extra features. TypeScript is structural, not nominal, and its code may be produced in accordance with the ES5 and ES6 standards to support the most recent browsers. It is compatible with ECMAScript and will focus on saving developers time.

Main difference between JavaScript and TypeScript

difference between JavaScript and TypeScriptThere are numerous similarities between TypeScript and JavaScript. Both are used to build interactive web pages. TypeScript is a JavaScript specialized version designed to reduce code complexity in big, complicated applications. JavaScript is a programming language that may be used to create dynamic web page content. However, when TypeScript vs JavaScript is compared, JavaScript is a lightweight, processed, dynamic language for web design. It is used to supplement HTML web pages in bespoke web app development.

Other Differences between Typescript vs JavaScript

Learning curve

 The learning curve for TypeScript is steep. It also necessitates scripting knowledge. JavaScript is a simple and versatile language for creating web scripts.

Data Binding

TypeScript defines the data being used using notions like interfaces and forms. JavaScript does not support such a concept.

TS vs JS- Typing

 While JavaScript is loosely typed, it is more adaptable for individuals or small teams, TypeScript has optional static typing, which can assist catch problems as they are written, making it ideal for big team collaboration. TypeScript is also intended for scalability in web applications.


The Ecosystem is extremely strong and user-friendly. Thus, it enables you to statically type expressive JavaScript features such as union types, intersections, and discriminating unions. JavaScript allows you to investigate and develop code without having to compile it first.

When to choose JavaScript?

Developing online and mobile applications

JavaScript frameworks may be used by developers to create online and mobile apps. They are compilations of JavaScript code libraries that give developers pre-written code to employ for everyday programming functions and tasks—essentially, a framework around which to create websites or online apps.

Including interactive features on web pages

Users can communicate with web pages using JavaScript. When you want to show or conceal more data with the touch of a button, there are essentially no boundaries to what you can do with JavaScript on a web page when the mouse lingers over a button, change its color; on the site, scroll through a picture carousel,  when zooming in or out on a picture, displaying animations and streaming music and video on a web page.

Game development: Java can be used to make web games. It is an excellent approach for new developers to hone their JavaScript abilities.

When to choose TypeScript?

When team members are accustomed to statistical language: If you or the majority of your team come from a statically typed language such as C# or Java and don’t want to commit to JavaScript, TypeScript is a viable option. Even if you have a strong understanding of Java, you can use TypeScript without knowing JavaScript.

TypeScript recommended framework

Use TypeScript if you’re using Angular 2 or a similar library that promotes it. Just keep in mind that, while TypeScript can access any JavaScript libraries out of the box, you’ll need to provide the type definitions for those libraries outside if you want acceptable syntax errors.

Large codebase

When your codebase is large and several people work on the project, a type system would help you prevent many typical errors. This is particularly true for one-page apps. It’s typically a good idea to have some form of safety mechanism in place whenever one developer may propose breaking modifications. The TypeScript transpiler highlights the most obvious errors.

When to choose typescript over javascript?

TypeScript is more trustworthy

TypeScript code is more dependable and simpler to modify than JavaScript code. This makes it considerably easier for developers to avoid mistakes and change code. Types invalidate the majority of the foolish errors that may creep into JavaScript codebases, and they enable a speedy feedback loop to remedy all of the little issues that occur when developing new code and debugging.

They can be used interchangeably

As JavaScript is a subset of TypeScript, you may utilize any JavaScript library or code in your TypeScript project. Since most popular JavaScript libraries feature types, you can progressively incorporate TypeScript into your JavaScript codebase by first adding types to particular modules and then extending them.

TypeScript is more specific.

Attempting to make types clear concentrates our emphasis on how our system is structured and how its many components interact with one another. It is critical in large-scale systems to be able to separate away from the parts of the network while maintaining the background in mind. typescript allows us to do so.

What should I learn? Typescript vs JavaScript

If you’re completely unfamiliar with the domain of programming, you should definitely start with JavaScript. Note that TypeScript extends JavaScript, so start off small and gradually build up. You’re ready to tackle TypeScript once you’ve mastered JavaScript. TypeScript is a must-have if you want to be more competitive as a web developer, especially if you want to work on large, complicated projects. It will assist you in detecting issues prior to runtime and building apps faster than JavaScript alone. 

In the end: which one is better? Typescript vs JavaScript

JavaScript has been the most common programming language for many years, but TypeScript’s usage has grown significantly since 2017 which raised the question: will TypeScript replace JavaScript? The scope of the project is an essential aspect to examine. TypeScript does not stand out and may not be worth the hassle for smaller applications. In this scenario, JavaScript may be more useful because it is portable and lightweight. TypeScript is the chosen language for medium and big applications. First, it is easier to restructure code in TypeScript. Second, TS depends more on clear types, allowing developers and teams to better grasp how the various elements interact. Lastly, TypeScript detects flaws and other issues during compilation, which improves efficiency while working on large-scale projects. 


When your team is fresh and working on tiny web projects, JavaScript is best suited. TypeScript is an excellent choice if you have a workforce with strong skills and understanding and need them to tackle a big project.

JavaScript is a fantastic language; otherwise, it would not have been the most popular for so long. However, this does not imply that it is flawless. When dealing with larger projects, JavaScript may get cluttered and complex. As a result, Microsoft created TypeScript.

TypeScript is just JavaScript with the potential to scale. The key distinction between them is that TypeScript is tightly typed whereas JavaScript is not. Furthermore, unlike JS, TS was meant to handle larger projects. The differences between TypeScript and JavaScript are not as numerous as you would expect, although they are important.

You may contact Echo Innovate IT, a leading front-end development company, and arrange a free consultation to discover how to select the best technology and language for your project specifications.




Kush P

Kush Patel is the Chief Technical Officer and Managing Director of Echo Innovate IT – a software development company. He is responsible for the overall operations of the company and has played a major role in making Echo innovate IT the top-notch IT services provider and transforming it into a globally trusted web and app development company.