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  1. Stackups
  2. Application & Data
  3. Languages
  4. Languages
  5. JavaScript vs TypeScript

JavaScript vs TypeScript

OverviewDecisionsComparisonAlternatives

Overview

JavaScript
JavaScript
Stacks392.3K
Followers284.0K
Votes8.1K
TypeScript
TypeScript
Stacks105.1K
Followers74.2K
Votes503
GitHub Stars106.6K
Forks13.1K

JavaScript vs TypeScript: What are the differences?

JavaScript and TypeScript are both popular programming languages used for web development. Here are the key differences between JavaScript and TypeScript:

  1. Type System: JavaScript and TypeScript differ in their type systems. JavaScript is dynamically typed, performing type checking at runtime, while TypeScript is a statically typed superset of JavaScript. With TypeScript, developers can define types for variables, function parameters, and return values, enabling early error detection and improving code readability.

  2. Language Features and Syntax: JavaScript is a versatile language with a concise syntax that supports object-oriented programming, functional programming, and asynchronous programming using promises and async/await. TypeScript, being a superset of JavaScript, includes all the features of JavaScript and adds additional features such as static typing, interfaces, generics, and advanced type inference. These additional language features make TypeScript more robust and provide enhanced tooling support, including code editors with autocompletion and type checking.

  3. Compilation and Compatibility: JavaScript is an interpreted language, meaning the JavaScript code is executed directly by the browser or the JavaScript engine. On the other hand, TypeScript code needs to be transpiled into JavaScript before it can be executed. TypeScript code is compiled to JavaScript using the TypeScript compiler. TypeScript is backward compatible with JavaScript, which means JavaScript code can be seamlessly used within TypeScript projects, allowing for incremental adoption of TypeScript in existing JavaScript codebases.

  4. Developer Productivity and Maintainability: TypeScript enhances developer productivity and code maintainability compared to JavaScript. Its static typing catches errors at compile-time, improving code quality and reducing runtime issues. TypeScript's clear interfaces and type annotations make code easier to understand and refactor. With robust tooling support, TypeScript boosts developer productivity, while JavaScript's dynamic typing may require more effort for maintenance and refactoring.

  5. Community and Ecosystem: JavaScript has a mature ecosystem with abundant libraries, frameworks, and tools. TypeScript builds on top of JavaScript, leveraging this ecosystem and providing enhanced type safety. Many JavaScript libraries have TypeScript support, making it seamless to use them in TypeScript projects. TypeScript also has a dedicated community and tooling support.

In summary, JavaScript is a dynamic scripting language widely used for web development, while TypeScript is a statically typed superset of JavaScript that adds static typing and other advanced language features. TypeScript provides benefits such as type checking, enhanced code maintainability, and improved developer productivity.

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Advice on JavaScript, TypeScript

StackShare
StackShare

Aug 13, 2019

Needs adviceonTypeScriptTypeScriptCoffeeScriptCoffeeScriptJavaScriptJavaScript

From a StackShare community member: "We are looking to rewrite our outdated front-end with TypeScript. Right now we have a mix of CoffeeScript and vanilla JavaScript. I have read that adopting TypeScript can help enforce better code quality, and best practices. I also heard good things about Flow (JS). Which one would you recommend and why?"

405k views405k
Comments
Muhamed
Muhamed

Apr 28, 2020

Needs adviceonPythonPythonJavaScriptJavaScriptDjangoDjango

I am currently learning web development with Python and JavaScript course by CS50 Harvard university. It covers python, Flask, Django, SQL, Travis CI, javascript,HTML ,CSS and more. I am very interested in Flutter app development. Can I know what is the difference between learning these above-mentioned frameworks vs learning flutter directly? I am planning to learn flutter so that I can do both web development and app development. Are there any perks of learning these frameworks before flutter?

737k views737k
Comments
Abdul
Abdul

Jun 22, 2020

Needs adviceonJavaScriptJavaScriptPythonPythonRustRust

So, I've been working with all 3 languages JavaScript, Python and Rust, I know that all of these languages are important in their own domain but, I haven't took any of it to the point where i could say I'm a pro at any of these languages. I learned JS and Python out of my own excitement, I learned rust for some IoT based projects. just confused which one i should invest my time in first... that does have Job and freelance potential in market as well...

I am an undergraduate in computer science. (3rd Year)

655k views655k
Comments

Detailed Comparison

JavaScript
JavaScript
TypeScript
TypeScript

JavaScript is most known as the scripting language for Web pages, but used in many non-browser environments as well such as node.js or Apache CouchDB. It is a prototype-based, multi-paradigm scripting language that is dynamic,and supports object-oriented, imperative, and functional programming styles.

TypeScript is a language for application-scale JavaScript development. It's a typed superset of JavaScript that compiles to plain JavaScript.

Statistics
GitHub Stars
-
GitHub Stars
106.6K
GitHub Forks
-
GitHub Forks
13.1K
Stacks
392.3K
Stacks
105.1K
Followers
284.0K
Followers
74.2K
Votes
8.1K
Votes
503
Pros & Cons
Pros
  • 1670
    Can be used on frontend/backend
  • 1497
    It's everywhere
  • 1163
    Lots of great frameworks
  • 899
    Fast
  • 746
    Light weight
Cons
  • 24
    A constant moving target, too much churn
  • 20
    Horribly inconsistent
  • 16
    Javascript is the New PHP
  • 9
    No ability to monitor memory utilitization
  • 8
    Shows Zero output in case of ANY error
Pros
  • 173
    More intuitive and type safe javascript
  • 105
    Type safe
  • 80
    JavaScript superset
  • 48
    The best AltJS ever
  • 27
    Best AltJS for BackEnd
Cons
  • 5
    Code may look heavy and confusing
  • 4
    Hype

What are some alternatives to JavaScript, TypeScript?

Python

Python

Python is a general purpose programming language created by Guido Van Rossum. Python is most praised for its elegant syntax and readable code, if you are just beginning your programming career python suits you best.

PHP

PHP

Fast, flexible and pragmatic, PHP powers everything from your blog to the most popular websites in the world.

Ruby

Ruby

Ruby is a language of careful balance. Its creator, Yukihiro “Matz” Matsumoto, blended parts of his favorite languages (Perl, Smalltalk, Eiffel, Ada, and Lisp) to form a new language that balanced functional programming with imperative programming.

Java

Java

Java is a programming language and computing platform first released by Sun Microsystems in 1995. There are lots of applications and websites that will not work unless you have Java installed, and more are created every day. Java is fast, secure, and reliable. From laptops to datacenters, game consoles to scientific supercomputers, cell phones to the Internet, Java is everywhere!

Golang

Golang

Go is expressive, concise, clean, and efficient. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel type system enables flexible and modular program construction. Go compiles quickly to machine code yet has the convenience of garbage collection and the power of run-time reflection. It's a fast, statically typed, compiled language that feels like a dynamically typed, interpreted language.

HTML5

HTML5

HTML5 is a core technology markup language of the Internet used for structuring and presenting content for the World Wide Web. As of October 2014 this is the final and complete fifth revision of the HTML standard of the World Wide Web Consortium (W3C). The previous version, HTML 4, was standardised in 1997.

C#

C#

C# (pronounced "See Sharp") is a simple, modern, object-oriented, and type-safe programming language. C# has its roots in the C family of languages and will be immediately familiar to C, C++, Java, and JavaScript programmers.

Scala

Scala

Scala is an acronym for “Scalable Language”. This means that Scala grows with you. You can play with it by typing one-line expressions and observing the results. But you can also rely on it for large mission critical systems, as many companies, including Twitter, LinkedIn, or Intel do. To some, Scala feels like a scripting language. Its syntax is concise and low ceremony; its types get out of the way because the compiler can infer them.

Elixir

Elixir

Elixir leverages the Erlang VM, known for running low-latency, distributed and fault-tolerant systems, while also being successfully used in web development and the embedded software domain.

Swift

Swift

Writing code is interactive and fun, the syntax is concise yet expressive, and apps run lightning-fast. Swift is ready for your next iOS and OS X project — or for addition into your current app — because Swift code works side-by-side with Objective-C.

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