HomeIT GlossaryJavaScriptWhat are the key differences between JavaScript and TypeScript?

What are the key differences between JavaScript and TypeScript?

JavaScript (JS) and TypeScript (TS) are closely related, but they differ in type safety, scalability, and developer experience. JavaScript is a dynamic, loosely typed scripting language, making it highly flexible but prone to runtime errors. TypeScript, a superset of JavaScript, introduces static typing, better tooling, and improved maintainability, making it ideal for large-scale applications.

TypeScript compiles to JavaScript, meaning all TS code eventually runs as JS in the browser or Node.js. While JavaScript is perfect for quick, small projects, TypeScript provides stricter code quality and debugging benefits for complex applications.

Key Takeaways:

JavaScript → Dynamically typed, best for small projects & rapid prototyping.
TypeScript → Statically typed, ideal for large-scale applications & maintainability.
TypeScript compiles to JavaScript, ensuring browser compatibility.

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Lana Ilic
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