TypeScript vs JavaScript: A short To the point comparison

Feature	JavaScript	TypeScript
Type System	Dynamic (loosely typed)	Static (strongly typed with optional types)
Compilation	Interpreted by browsers	Compiled to JavaScript
Error Checking	Errors appear at runtime	Errors detected at compile time
Code Maintainability	Can be harder to maintain in large projects	Easier maintenance with type safety
Object-Oriented Features	Supports OOP but lacks some features	Has interfaces, generics, and better OOP support
ES6+ Features	Supported	Supports all JavaScript features + additional ones
Browser Support	Directly supported by browsers	Needs to be compiled to JavaScript
Learning Curve	Easier for beginners	Requires learning types and compilation process
Tooling & IDE Support	Basic support	Better autocompletion, refactoring, and debugging in IDEs

When to Use What?

• Use JavaScript for quick scripts, small projects, or when working directly with the browser.
• Use TypeScript for large-scale applications, better maintainability, and type safety.

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Comments

[Peter Vivo]

I think we forget the JSDoc, again!

Feature	JS + JSDoc	TypeScript
Type System	Dynamic, strongly typed, TS compatible	Dynamic, strongly typed
Compilation	Interpreted by browsers	Compiled to JavaScript
Error Checking	Type errors may detected at development time	Type errors may detected at development time
Code Maintainability	Easier maintenance with type safety	Easier maintenance with type safety
Object-Oriented Features	imho forcing to use OOP is different topic	Has interfaces, generics, and better OOP support
ES6+ Features	Supported	Supports all JavaScript features + additional ones, this cause a some pains
Browser Support	Directly supported by browsers	Needs to be compiled to JavaScript
Learning Curve	Reguires learn TS types by JSDoc syntax and proper project config	Requires learning types and compilation process
Tooling & IDE Support	Better autocompletion, refactoring, and debugging in IDEs	Better autocompletion, refactoring, and debugging in IDEs

JSDoc evangelism