Difference Between JavaScript and TypeScript

27 October 2020 Posted by Payal Jha 9 Min Read

Key Difference Between JavaScript and TypeScript

JavaScript (JS) is an utterly dynamic programming language that can use to add interactivity to a website. JavaScript code runs on a browser only and it is specifically an object-oriented scripting language. JavaScript (JS) language syntax is pretty similar to the C programming language but naming conventions are similar to Java Programming Language. It is a scripting Language with a plain text code. JavaScript also has an extensive list of online sources, documentation, and online forums, we can see its execution in the browser immediately. If we want to make web applications we can learn JavaScript. It supports Object-oriented Programming concepts like classes, polymorphism, inheritance, etc.

TypeScript is an open-source superset of JavaScript which is developed by Microsoft. In another word, it's an attempt to 'fix' the missing parts of JavaScript. Any valid JavaScript application is also a TypeScript application. TypeScript compiles code into JavaScript of various ECMAScript flavors and is well supported by IDEs. TypeScript used ES6 syntax with Type Annotation and compiles to plain JavaScript. It is an object-oriented and strongly typed language. TypeScript is JavaScript with other surplus characteristics. TypeScript can support other libraries of JavaScript and any accepted .js file can be renamed to .ts and compiled with other TypeScript files. This language has some unique features as it comes with optional static typing via TLS which is known as TypeScript Language Service.

What is JavaScript?

JavaScript specifically an object-oriented scripting language and utterly dynamic programming language that can use to add interactivity to a website. A scripting language is a lightweight programming language, it's consists of lines of executable computer code. JavaScript is usually embedded directly into HTML Pages, it supports server-side scripting also, separately known as Livewire.

  • JavaScript developed by Netscape Corporation known as "Live Script".
  • First support in Netscape Navigator 2.0.
  • It's also known as scripting tool.
  • JavaScript is a freely typed language.
  • JavaScript is used to create interactive content.
  • It was originally developed in the mid 1990s, it will called ActionScript.
  • The main motive for development of JS is that development of client-side.

Why use JavaScript?

JS is a text-based programming language used both on the Client-side and server-side platform and JavaScript (JS) specifically an object-oriented scripting language and utterly dynamic programming language that can use to add interactivity into a website. There are the features of JS.

  • JS gives HTML Designers a programming tool.
  • Js use for improving the design into web pages.
  • JavaScript enhanced Web Pages with dynamic and interactive features, it's run in client software.
  • JavaScript (JS) language syntax is pretty similar to the C programming language but naming conventions are similar to Java Programming Language.
  • It have In-Built Function.
  • JavaScript is a Object-Based Scripting Language.
  • JavaScript provides validation of User's Input.
  • client edge Technology.

What is TypeScript?

TypeScript is JavaScript, in another word all TypeScript code is converted into its JavaScript co-ordinate for execution. It is an open-source superset of JavaScript which is developed by Anders Hejlsberg of Microsoft. TypeScript is a set of tools and an attempt to 'fix' the missing parts of JavaScript. It is an Object-oriented Programming language and works with Inheritance, interface, polymorphism, etc. TypeScript is JavaScript with other surplus characteristics. TypeScript can support other libraries of JavaScript and any accepted .js file can be renamed to .ts and compiled with other TypeScript files.

  • It comes with an optional static typing via TLS which is known as TypeScript Language Service.
  • Any accepted JavaScript application is also a TypeScript application.
  • TypeScript used ES6 syntax with Type Annotation and compiles to plain JavaScript.
  • It is a strongly typed and object-oriented language.
  • A Superset of JavaScript => JavaScript + Static Types.

Why use TypeScript?

TypeScript is an Object-oriented, strong type of language and it compiles into JS Code. Any accepted .js file can be renamed to .ts and compiled with other TypeScript files. There are some incredible specifications for TypeScript.

  • It has optional static typing with VsCode strong Support.
  • It will take a little time to Re-compile.
  • Better structure.
  • Large Applications.
  • TypeScript is a superset of Javascript with more features.

Features of TypeScript

TypeScript has incredible features as it comes with a strong static type through TypeScript Language Service. It has supported other libraries of JS in another way any valid .jS file can be renamed to .ts and complied with other files of TypeScript. TypeScript is an open-source, object-oriented language which is used ECMAScript6 syntax.

TypeScript has a compilation step to JavaScript that catches all kinds of errors before it reaches runtime and breaks something.

  • It's provide a structuring mechanism for large pieces of codes.
  • TypeScript avoid adding expression-level syntax.
  • TypeScript is categorize with the ECMAScript6 specification.
  • It will compile the code and generate compilation errors.
  • TypeScript be a cross-platform development tool.It is align with current and future ECMAScript proposals.
  • TypeScript use a consistent, fully erasable, structural type system.
  • It is align with current and future ECMAScript proposals.
  • It support standard JS code with static typing and Encapsulating through classes and modules.

Note: TypeScript is JavaScript with other surplus characteristics and it supports another library of JavaScript.

Step by Step TypeScript

1 TypeScript Code TypeScript file (.ts) (Types, modules, interface)
2 Compilation TypeScript Compilation (tsc) (Target: ES5/ES6)
3 JS code JavaScript file (.js) (Runs everywhere)

Comparison Between JavaScript and TypeScript

JavaScript Vs TypeScript

Client-side Scripting Language. TypeScript is JavaScript.
It is an implementation of ES standard. It's uses ES6 (2015) Syntax.
It is not strongly typed. It have static strong typing.
JavaScript programming requires a text editor. TypeScript is set of tools.
It's written in Plain Text. It started and end with JavaScript.
It is less Secured and developer have to make efforts to secure it's coding. It comes with Optional static typing via TypeScript Language Service.
JavaScript source file is in ".js" extension. TypeScript source file is in ".ts" or ".tsx" extension.
All Statement of JavaScript are written inside of Script tag. A TypeScript program comprises functions, variables, modules etc.
Annotation is not required for coding in JavaScript. Annotation must be required for coding in TypeScript.
Interpreted. Compiler.

Reference

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About author

Arun Kumar(Entrepreneur, Blogger, Thinker & SEO Expert)

Arun Kumar (Entrepreneur, Blogger, Thinker & SEO Expert)

I’m a part-time blogger and a SEO Expert, Current living in India. Along with blogging, I also like to make software projects, make videos about SEO, programming languages and web technologies.



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