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Typescript vs Javascript – What’s the Difference?

Typescript vs JavaScript

Typescript vs JavaScript

Are you a programmer or website developer trying to decide between Typescript and Javascript? This can be a difficult decision, as both have powerful advantages and unique features.

Typescript and Javascript are both important components of web development, and it’s important to understand the differences between them. This article will explore the differences between these two languages.

Table Comparison: Typescript vs Javascript

Let’s start with a table comparison that demonstrates the differences between Typescript and Javascript. It covers areas such as compilation, code structure, and readability.

Type SystemStrongly typed with static typesDynamically typed
CompilationRequires compilation to JavaScriptExecutes directly by the browser
Code StructureSupports classes, interfaces, modulesSupports functions, objects, arrays
Type AnnotationsAllows adding type annotationsNo built-in type annotations
Null/Undefined ChecksHas strict null/undefined checksNo built-in null/undefined checks
Tooling SupportRich tooling and IDE supportLimited tooling support
ReadabilityImproves code readability with typesRequires well-structured code
Error DetectionDetects type-related errors at compile-timeDetects errors at runtime
Code MaintenanceReduces runtime errors and bugsPotential for runtime errors
ECMAScript CompatibilitySupports newer ECMAScript featuresSupports ECMAScript standards
OOP SupportStrong support for object-oriented programmingSupports OOP principles
Backward CompatibilityMight require adjustments due to type constraintsMaintains backward compatibility
Learning CurveMight have a steeper learning curveRelatively easier to learn
Coding StandardsPromotes structured and maintainable codeRequires consistent coding practices
Ecosystem & LibrariesFewer third-party libraries due to typingWide range of libraries available
Community & SupportGrowing community and TypeScript documentationVast JavaScript community and resources
Browser CompatibilityMust be compiled to older ECMAScript versions for older browsersCompatible with older and modern browsers
Usage ExampleSuitable for large-scale applications, complex projectsIdeal for web development, scripting, and simple projects

Overview of Typescript


Typescript is like an improved version of Javascript that compiles clean and readable Javascript. So that means that any valid Javascript code is also valid Typescript code.

Typescript is an open-source language that was created to supersede Javascript. It uses static typing and type inference to improve the scalability of large applications.

It is important to note that Typescript is a superset of Javascript, which means that it is Javascript at its core and uses Javascript syntax. But JavaScript can run directly in a browser, unlike Typescript.

Overview of Javascript

JavaScript Logo

JavaScript is used to create and control web pages, providing users with a richer and more interactive experience. It interacts with HTML and CSS, allowing web developers to process code in a web browser.

JavaScript is used for both client-side and server-side scripting. It was first created in 1995 by Brendan Eich as a part of a browser called Netscape Navigator.

Now, Javascript is the most popular language in the world, and around 90% of websites use it. The core language of Javascript has remained largely unchanged since its inception. But it has been updated to include new features and functionality.

Differences between Typescript and Javascript

One of the first things to understand when comparing Typescript and Javascript is that they are different programming languages. This means that they will each have their own strengths and weaknesses as well as different features and uses.

The core difference between Typescript and Javascript is that Typescript is a statically typed language, which means that the types are determined at compile time. This means Typescript can catch early bugs because it can alert developers before runtime.

Javascript, on the other hand, is a loosely typed language that uses dynamic typing. This means that the types are determined at runtime. As a result, developers can’t catch early bugs like TypeScript.

Now that we have learned the basics of both Typescript and Javascript, let’s take a look at some of their advantages and disadvantages. This can help you understand the key differences between these two programming languages and decide which one is right for your project.

Advantages of Typescript

As mentioned above, Typescript is a superset of Javascript. This means that it includes all of the features of Javascript plus a few additional features.

Some of the major advantages of Typescript include static type checking, Intellisense, and increased readability:

  • Optional static typing – A variable doesn’t change its type once declared. This is better to catch early bugs because Typescript can alert developers before runtime. It also means that your code will be more stable and less likely to break.
  • Intellisense – Typescript can help developers write cleaner code with automatic code completion. For any method, you can see its properties and parameters. The advantages of this are ease of use, scalability, and speed.
  • New features – There are also several other improvements such as API documentation, type annotation, generics, and the possibility for advanced IDE support.
  • Advanced IDE support – Advanced IDE support allows for easier debugging and easier code navigation. With improved code readability, your code will be easier to understand for future developers.

Disadvantages of Typescript

Typescript, like all programming languages, has a few disadvantages which can be attributed to its complexity.  Some of these disadvantages include slower compilation time and its steep learning curve.

  • Difficult to learn – Some developers find Typescript difficult to learn and use effectively. This is especially true for developers who are used to working with JavaScript, as Typescript requires a different set of skills and knowledge to be effective.
  • Complexity – Since Typescript is a strongly-typed language, it can introduce an additional layer of complexity when dealing with large and complex applications.
  • Performance – Typescript can cause performance issues when running large applications due to its need to compile code. This can result in slower speeds and reduced performance, which can be an issue for applications that need to run quickly and efficiently.
  • Debugging – Since Typescript is a transpiled language, it can be difficult to debug code, as the original source code does not match the output from the compiler. This can make debugging difficult and time-consuming, which can be a major issue for developers.


Typescript is an open-source language that was created to supersede Javascript, while Javascript is the most popular programming language in the world.

Now that you understand the differences between Typescript and Javascript, you can make an informed decision about which web development language is best for you and your project.


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