Ever wondered about the difference between JavaScript and TypeScript? If you’re into web development, knowing these two languages is super important. They might seem alike, but they’re actually pretty different and can affect how you code and build stuff online.

In this article, we’ll break down the gap between JavaScript and TypeScript. We’ll talk about what makes each one special, where they shine, and when you might wanna pick one over the other. So, let’s explore.

Why do We Need TypeScript When We have JavaScript?

JavaScript, initially designed as a client-side language, expanded to server-side use. However, its growing complexity and limitations in Object-Oriented Programming hindered its enterprise adoption. To address this, TypeScript was created to enhance JavaScript, providing static typing and features for robust enterprise-level server-side development.

Features of TypeScript:

Transpilation to JavaScript: TypeScript code is transpiled into JavaScript for browser interpretation, enabling browsers to read and display the code.
JavaScript to TypeScript Conversion: Code in JavaScript can be converted to TypeScript by changing the file extension from .js to .ts.
Versatile TypeScript Usage: TypeScript can be compiled to run on any browser, device, or operating system, making it adaptable to diverse environments.
JavaScript Library Support: TypeScript seamlessly supports existing JavaScript code, allows the integration of popular JavaScript libraries, and facilitates calling TypeScript code from native JavaScript.

Difference between TypeScript and JavaScript:

TypeScript is known as an Object-oriented programming language whereas JavaScript is a prototype-based language.
TypeScript has a feature known as Static typing but JavaScript does not support this feature.
TypeScript supports Interfaces but JavaScript does not.

Feature	TypeScript	JavaScript
Typing	Provides static typing	Dynamically typed
Tooling	Comes with IDEs and code editors	Limited built-in tooling
Syntax	Similar to JavaScript, with additional features	Standard JavaScript syntax
Compatibility	Backward compatible with JavaScript	Cannot run TypeScript in JavaScript files
Debugging	Stronger typing can help identify errors	May require more debugging and testing
Learning curve	Can take time to learn additional features	Standard JavaScript syntax is familiar

Advantages of using TypeScript over JavaScript

TypeScript always points out the compilation errors at the time of development (pre-compilation). Because of this getting runtime errors is less likely, whereas JavaScript is an interpreted language.
TypeScript supports static/strong typing. This means that type correctness can be checked at compile time. This feature is not available in JavaScript.
TypeScript is nothing but JavaScript and some additional features i.e. ES6 features. It may not be supported in your target browser but the TypeScript compiler can compile the .ts files into ES3, ES4, and ES5 also.

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