Static Typing: Variable types and function types are expressible in TypeScript. Due to this, faults are detected in a preliminary step and consequently, neither runtime failures nor good code quality can be reached.
Better Tooling: TypeScript provides auto-completion, real-time feedback, and refactoring capabilities. This improves productivity and speeds up development.
Maintainability: (Strict type and interface usage lead to highly maintainable code, especially in large-scale projects). It enables the writing of code that is optimized and runs large applications.
Backward Compatibility: TypeScript is a superset of JavaScript. This means existing JavaScript code works in TypeScript. As such, you can further and further extend its application without altering your code.

Cons:

Steeper Learning Curve: For those who do not know TypeScript types and interfaces, it is tricky. This may slow initial development.
Compilation Step: TypeScript must be converted into JavaScript before it runs. At this level, the number of operations in the manufacturing process is increased, and therefore the time to manufacture is decreased.
Potential Overhead: If it is so, the generated JavaScript code is more verbose as a result of its class type which may impact performance in certain cases.

JavaScript

Pros:

Simplicity and Flexibility: JavaScript is dynamically typed, so prototypes and dynamic code can be easily prototyped and written. There’s less need for boilerplate code compared to TypeScript.
Immediate Execution: JavaScript is an uncompiled language, and it can be executed directly in the browser. This allows for faster iterations and quick feedback.
Widespread Adoption: JavaScript is supported by all browsers and platforms. It has an impressive ecosystem of libraries and frameworks that have contributed to its capability.

Cons:

Runtime Error Detection: Errors in JavaScript are caught only at runtime. This makes debugging harder, especially in larger applications.
Less Structure: Since mobility brings challenges in JavaScript control for rapidly expanding projects, it points to an equivocation caused by flexibility. Without strict typing, type-related issues may arise.
Limited Tooling: However, JavaScript is not able to deliver the fluent features of a statically typed language with rich benefits in the form of a curated set of development tools as is available with typings, without the need for static typing.

Key Differences Between TypeScript and JavaScript

Performance

Syntax

File Extension

IDE Support

Complexity

Readability

Compatibility

Tools and Frameworks

Learning Curve

Quick Comparison: TypeScript vs JavaScript

Feature	JavaScript	TypeScript
Typing	Dynamic	Static
Development Speed	Faster for prototyping and small projects	Slower initially, faster for large projects
Learning Curve	Easier for beginners	Steeper, especially for those new to static typing
Tooling and IDE Support	Basic	Advanced (better autocompletion, refactoring, type checking)
Error Detection	Run-time	Compile-time (reduces run-time errors)
Community and Ecosystem	Vast and mature	Growing rapidly
Use Cases	Small to medium projects, rapid development	Large-scale applications, enterprise solutions
Object Orientation	Prototype-based	Class-based (supports both classical and prototype-based)
Frameworks	React, Vue, Angular	Angular, NestJS
Modern JavaScript Features	Supported	Supported, plus interfaces and enums
Performance	Directly executed in browsers	Compiles to JavaScript, slight delay due to compilation

Wrapping Up

WRITTEN BY

Akshay Vadsara

Tech Consulting Partner

Akshay is a content management system pro with expertise in dotCMS and Java. He creates dynamic, content-rich websites and applications that deliver a smooth experience.

Akshay Vadsara

Tech Consulting Partner

Akshay is a content management system pro with expertise in dotCMS and Java. He creates dynamic, content-rich websites and applications that deliver a smooth experience.