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TypeScript vs JavaScript

Differences Between TypeScript vs JavaScript

Typescript is an open-source programming language. This means that the Typescript is JavaScript plus other features. We can call it a superset of javascript that means Typescript is JavaScript plus other features.

JavaScript is a lightweight, interpreted programming language. It is a dynamic programming language. JavaScript does not have any multithreading or multiprocessing capabilities. It is used in web development for enhancing HTML pages.

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Head to Head Comparison Between TypeScript and JavaScript(Infographics)

Below are the Top 9 comparisons between TypeScript and JavaScript:

Typescript vs JavaScript Infographics

Key Differences Between TypeScript and JavaScript

The basic key difference between Typescript and JavaScript is summarized below:

  • The main advantage of Typescript over JavaScript is that Typescript is a superset of JavaScript. So Typescript was designed for the development of a large program that trans compile to JavaScript.
  • JavaScript is used in development for enhancing HTML pages in an interactive and design fashion. It is used, particularly on the client-side. But Typescript may be used to develop a JavaScript application for both client-side and server-side. It is designed for the development of a large application that trans compile to JavaScript.
  • One of JavaScript’s main advantages is that it does not require costly development tools; you can start with a simple text editor such as notepad. Since it is an interpreted language inside a web browser, so you don’t even need to buy a compiler. Whereas its counterpart, Typescript, is included as a first-class programming language to support expensive IDE visual studio 2013 update 2 and Eclipse via a plugin a contribution by particular technologies.
  • We cannot use JavaScript as a full-fledged programming language as it lacks various important features such as client-side javascript does not allow the reading or writing of files, whereas Typescript is a strongly typed object-oriented compile language. It is both a language and a set of tools.
  • Typescript supports other JavaScript libraries, and Typescript-generated JavaScript can reuse all JavaScript frameworks, tools, and libraries.
  • The main reason behind the development of typescript by Microsoft is to make it used in the development of large-scale applications both at Microsoft and its external customers.
  • JavaScript cannot be used for a network application because it doesn’t have such support available.
  • Typescript support definition file which can hold up type information of existing JavaScript libraries, much like C++ header files which can describe the structure of existing object files? So this allows other programs to use the values defined in the files.
  • The typescript compiler is written in Typescript, and it compiles to JavaScript.

Comparison Table Between TypeScript and JavaScript

Following is the comparison table between TypeScript and JavaScript.

Basis Of Comparison  TYPESCRIPT JAVASCRIPT
Type Typescript is a strongly
type object-oriented
compile language		 JavaScript is a
lightweight,
interpreted
programming language
Design &
Developed
by		 As already explained
above, it was designed and
developed by Anders
Hejlsberg at Microsoft.		 Brendan Eich at
Netscape
Communications
Corporation, Mozilla
Foundation, ECMA
International.
Light/Heavy Weight It is heavy weighted.
an interpreted
programming language.		 It is a light weighted
It is specially designed for
development of large
application and trans
compile to JavaScript
Client Side/ Server Side Specially used in Client
Side		 Both client-side and
server-side
File Extension . ts, .tsx .js
Syntax Syntax defines a set of
rules for writing
programs.Every language
specification defines its
own syntax. A
Typescript program is
composed of −

  • Modules
  • Functions
  • Variables
  • Statements and Expressions
  • Comments
 In JavaScript, all the
statements are written
within Script tagIt tells the browser
program to start
interpreting all the text
between these tags as a
script<script>// javascript code</script>
Example var message:string =
“Hello India”console.log(message)On compiling, it will
generate the following
JavaScript code.
//it Generated by
typescript 1.8.10
var message = “Hello
India”;
console.log(message);

  • The first line declares a variable by the name message. Variables are a way to save values in a program.
  • Second line prints the variable’s value to the prompt. Here, console refers to the terminal window. The function log () is used to display text on the screen.
 <html>
<body>
<script
language=”javascript”
type=”text/javascript”>
<!–
document.write
(“Hello World!”)
//–>
</script>
</body>
</html>
Benefits
  • Static Typing
  • A better choice for large Coding Projects
  • Better for collaboration.o When large coding projects have many developers. In that time, there is a chance of messier coding. And the number of errors increases, which makes handling difficult. So Type safety has a feature to detect errors during coding time. Which makes more efficient code, and also, we can debug it easily.
  • Better productivity.                         o Features like –                               o ECMAScript 6 code, dynamic typing, auto-completion are helped developer’s to boost their productivity.
  • It has a huge active community of developers, which makes it a more popularlanguage.
  • It supports native browsers. Whereas Typescript will first compiled and converted to javascript. Which is creating one extra step.
  •  With raw javascript, the lines of code are more so it difficult to maintain and make it error-free when the code size increases than its counterpart.
  •  More Flexibility.
Preference
to choose		 Since Typescript is an object-oriented
language. Which makes
our code more consistent,
clean, simple and reusable. So it
should better to use typescript
for developing large projects.		 JavaScript is preferable to use in
relatively small coding projects.

Conclusion

Brendan Eich invented javaScript in 1995 for the Netscape Navigator web browser of Netscape. It is implemented in C, and its code name was Spider Monkey. The project was originally called Mocha, then rename to Live Script, and finally, when Netscape and Sun did a license agreement, it was again renamed to JavaScript. It got the ECMA standard in 1997. But it is not a fully fledge programming language. It is an interpreted language inside the context of a web browser.

Typescript is design and development, especially for a large application, and trans compile to javascript. It means that Typescript is JavaScript with some extra loaded features. It is designed by Anders Hejlsberg, a designer of C# at Microsoft. It is licensed under Apache 2.  It compiled to JavaScript, which can be used for any JavaScript Code so, using Typescript has more advantages. Its popularity and its adoption are increasing drastically. The project is improving with every release, and more exciting features are added with new releases.

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This has been a useful guide to the Difference between TypeScript and JavaScript. Here we have discussed TypeScript and JavaScript head-to-head comparisons, key differences along with infographics, and a comparison table. You may also look at the following article to learn more –

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