TypeScript vs JavaScript

TypeScript vs JavaScript

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Anshuman
Anshuman Singh
Senior Executive - Content
Updated on Feb 9, 2023 16:51 IST

The main difference between TypeScript and JavaScript is that TypeScript is an open-source programming language that supports building large-scale web applications. On the other hand, JavaScript is a scripting language that supports you in creating interactive web pages.

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In this article, we will significantly explore the difference between TypeScript vs JavaScript. But, before we do that, let’s quickly go through the topics listed under the table of contents (TOC) that we will cover in this article.

Table of contents (TOC)

TypeScript vs JavaScript 

For a better understanding, let’s explore the difference between TypeScript vs JavaScript in a tabular format:

Benchmark TypeScript JavaScript
What is it? An object-oriented programming language that supports building large-scale web applications A scripting language that supports you in creating interactive web pages
Who created this language? Microsoft  Brendan Eich
Does this language support the interface concept to describe the data? Yes No
Does this language support both static and dynamic typing? Yes No. This language only supports dynamic typing.
Does this language support the concept of the types? Yes No
Does this language require prior scripting knowledge? Yes. The learning curve is quite stiff. No. It is easy to learn.
Does this language support the prototyping feature? Yes No
Does this language support the generic feature? Yes No
In this language, errors are detected In the early development stage Only at the run time
Does this language have a large community of developers that can share information? No Yes
Does the code written require compilation? Yes No
Are annotations needed? Yes. Developers should constantly annotate their code. No. There are no annotations required.
This language is best suited for Complex applications or large-scale web applications Web applications, game development, mobile and desktop applications, etc.
Popular brands using this language are Clever and Asana Instagram and Netflix

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What is TypeScript? 

TypeScript definition: TypeScript is an open-source programming language developed by Microsoft that supports building large-scale web applications. 

TypeScript can be considered an updated version of JavaScript that consists of various concepts and features that were missing in JavaScript, such as types, interfaces, prototyping, etc. In short, it can be considered a superset of JavaScript. Developers mainly use TypeScript to develop complex or large-web applications.

You can also explore: TypeScript online courses

TypeScript supports static and dynamic typing, and along with that, TypeScript always highlights or detects the error at the time of compilation, but this is not the case with JavaScript. In order to understand TypeScript in a better way, let’s go through a code written in TypeScript language.

You can also explore: Top 10 Basic TypeScript Interview Questions

TypeScript example:

TyeScript code to multiply two numbers:


 
function multiplyNumbers(a, b) {
return a * b;
}
var multiply = multiplyNumbers(45, 45);
console.log('Multiplication of the number is: ' + multiply);
Copy code

Now, to understand the TypeScript language better, let’s go through some of the advantages of TypeScript over JavaScript in the next section.

Advantages of TypeScript over JavaScript 

Regarding TypeScript vs JavaScript, there are various advantages of TypeScript over JavaScript. Let’s explore some of those advantages:

  • TypeScript supports both static and dynamic typing.
  • It has better documentation for APIs in comparison to JavaScript.
  • TypeScrit can operate or run on any browser and even on a JavaScript engine
  • It highlights errors at the time of compilation (time of development).
  • TypeScript underpins specifically static composing and helps in code organizing.
  • TypeScript has features like IntelliSense that automatically provide active hints while the user adds or writes the code.

What is JavaScript? 

JavaScript definition: JavaScript is a server-side programming language developed by Brendan Eich that helps develop interactive web pages.

JavaScript is one of the top programming languages in today’s era. This language is lightweight and cross-platform that is used for both front-end development as well as back-end development. Developers mainly use JavaScript in order to make the static pages more dynamic with sophisticated features and functionality, such as search boxes on various websites, such as Amazon, Netflix, Instagram, etc.

You can also explore: JavaScript Array Methods

In layman’s terms, we can define JavaScript as an object-oriented scripting language that allows you to add interactive elements to web pages. In order to better understand JavaScript, let’s look at the code that performs the same functions as the code above, but this time, written in the JavaScript language.

You can also explore: Top 85+ JavaScript Interview Questions and Answers for 2022

JavaScript example:

JavaScript code to multiply two numbers:


 
function multiplyNumbers(a, b) {
return a * b;
}
var multiply = multiplyNumbers(45, 55);
[removed]('Multiplication of the numbers is: ' + multiply);
Copy code

Advantages of JavaScript over TypeScript 

Regarding TypeScript vs JavaScript, there are various advantages of JavaScript over TypeScript. Let’s explore some of those advantages:

  • JayaScript supports abstract classes.
  • JavaScript code does not require compilation, but it’s not the same as TypeScript. Apart from that, TypeScript takes a long time to compile the code.
  • To run JavaScript in a browser, no compilation step is needed to run the script. Every web browser includes a JavaScript engine that provides a runtime environment for JavaScript.

Key differences between TypeScript vs JavaScript

Some of the key differences between TypeScript vs JavaScript are:

  • JavaScript does not support prototyping features, but TypeScript does.
  • JavaScript is a scripting language, but TypeScript is an open-source programming language.
  • TypeScript supports both static and dynamic typing. But JavaScript only supports dynamic typing.
  • TypeScript is used to build complex or large-scale web applications, whereas JavaScript is used to develop interactive web pages.
  • In TypeScript, errors are highlighted or detected at the time of compilation or early development phase. On the other hand, in JavaScript, the errors are detected only at the run time.

Conclusion

TypeScript can be considered the superset of JavaScript as it consists of various features and concepts that were missing in JavaScript. You can easily execute all the JavaScript files with the extension of .js in TypeScript without any issues.

Even after all this, JavaScript language is different and can’t be replaced with TypeScript language as it has its benefits, such as the TypeScript language can’t be executed directly in web browsers. This makes the position of JavaScript more prominent. Hence, we can say that both of these programming languages have their advantages and disadvantages.

Now that you understand the difference between TypeScript vs JavaScript, you can choose the appropriate language per your requirements or needs. If you have any queries regarding the topic, please feel free to send your queries to us. We will be happy to help!

FAQs

Regarding the difference between TypeScript vs JavaScript, what is TypeScript?

In terms of TypeScript vs JavaScript, TypeScript is an object-oriented programming language developed by Microsoft that supports building large-scale web applications.

Regarding the difference between TypeScript vs JavaScript, what is JavaScript?

In terms of TypeScript vs JavaScript, JavaScript is a server-side programming language developed by Brendan Eich that helps develop interactive web pages.

What is the main difference between TypeScript and JavaScript?

The main difference between TypeScript and JavaScript is that TypeScript is an object-oriented programming language that supports building large-scale web applications. On the other hand, JavaScript is a scripting language that supports you in creating interactive web pages.

Regarding the difference between TypeScript vs JavaScript, which language supports the interface concept to describe the data?

In terms of TypeScript vs JavaScript, TypeScript supports the interface concept to describe the data.

Regarding the difference between TypeScript vs JavaScript, which language supports both static and dynamic typing?

In terms of TypeScript vs JavaScript, TypeScript supports both static and dynamic typing.

Regarding the difference between TypeScript vs JavaScript, which language supports the prototyping feature?

In terms of TypeScript vs JavaScript, TypeScript supports the prototyping feature.

Regarding the difference between TypeScript vs JavaScript, code written in which language requires compilation?

In terms of TypeScript vs JavaScript, the code written in the Typescript language requires compilation.

Regarding the difference between TypeScript vs JavaScript, which language require prior scripting knowledge, and which one is flexible and easy to learn?

In terms of TypeScript vs JavaScript, TypeScript requires prior scripting knowledge, and JavaScript is flexible and easy to learn.

When should I choose TypeScript over JavaScript for a project?

TypeScript is often preferred for larger, more complex projects where type safety, better tooling, and improved code maintainability are crucial. JavaScript may be a better choice for smaller projects or when rapid development is a priority.

How does the learning curve of TypeScript compare to that of JavaScript?

TypeScript has a steeper learning curve than JavaScript due to its static typing and additional features. However, developers familiar with JavaScript can quickly adapt to TypeScript, and the benefits often outweigh the initial learning curve.

Can I use TypeScript with existing JavaScript codebases, or do I need to start from scratch?

You can gradually introduce TypeScript into existing JavaScript projects. TypeScript allows for gradual adoption, so you can add type annotations to existing JavaScript code as needed, making the migration process flexible.

About the Author
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Anshuman Singh
Senior Executive - Content

Anshuman Singh is an accomplished content writer with over three years of experience specializing in cybersecurity, cloud computing, networking, and software testing. Known for his clear, concise, and informative wr... Read Full Bio