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TypeScript vs JavaScript: What are the differences?

Published on Aug 05,2019 289 Views
17 / 29 Blog from JavaScript

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Hey wanderer. Are you in a dilemma of which scripting language, TypeScript or JavaScript, to go with? Well, this is just the right place for you. This article on TypeScript vs JavaScript will give you a complete understanding of both TypeScript and JavaScript programming language, to help you make your decision.

Below are the topics covered in this TypeScript vs JavaScript article:


Both languages are widely used when it comes to creating interactive web pages and of course it comes to that often in this age of internet enthusiasm and necessity. So, let’s dig deep and understand about TypeScript and JavaScript one by one and get wind of all the confusions in your head.

What is JAVASCRIPT?


Javascript - Javascript vs Typescript - Edureka JavaScript (JS) is a scripting language which is primarily used for creating web pages. It is used to enhance HTML pages and is generally embedded in HTML code. JavaScript doesn’t need to be compiled as its an interpreted language. It helps to create dynamic, creative and interactive web pages. JavaScript files are identified by the .js extension.

How to use JAVASCRIPT?


There are two ways to use JavaScript in an HTML file.

  • Embed all the JavaScript code into the HTML code.
  • Create a separate JavaScript file that can be called from within a Script element (enclosed by Script tags).

Why JAVASCRIPT?


JavaScript is the most used open-source programming language used extensively in most of the modern web applications, both the client-side as well as the server-side. It is flexible, has a reasonably elegant core, and enables you to use object-oriented and functional programming. A JavaScript variable can have any type of value such as number, string, array, boolean, etc.

What is TYPESCRIPT?


TypeScript - JavaScript vs TypeScript - EdurekaTypeScript is an open-source programming language that lets you write JavaScript the way you want to. TypeScript is a superset of JavaScript that compiles into simple JavaScript. TypeScript is purely object-oriented with classes and interfaces. It helps programmers to write object-oriented programs and have them compiled to JavaScript, both on the server-side and client-side.

How to use TYPESCRIPT?


TypeScript codes are written in files followed with the .ts extension. A TypeScript compiler needs to be installed on your platform which then compiles the TypeScript code to plain JavaScript file using the command “tsc .ts” . A TypeScript file can be written in any code editor and once it gets converted to plain JavaScript file, it can be included in the HTML and can be run on any browser.

tsc Example.ts

Example.ts—————🡪Example.js

Why TYPESCRIPT?


TypeScript is an open-source language and scales the JavaScript code, simplifies it, making it easier to read and debug. It provides you highly productive development tools for JavaScript IDEs and practices, like static checking. Also, it is easy to learn and implement for programmers who are already working on JavaScript. It works well with the already existing JavaScript libraries and frameworks.

Having read about the basic definition and the features of the two, let’s now compare them and find out more about both the languages.

TypeScript vs JavaScript

JavaScriptTypeScript
LanguageScripting languageObject-oriented programming language
Learning CurveFlexible and easy to learna programmer should have prior scripting knowledge
TypeLightweight, interpreted programming languageStrongly type object-oriented programming language
Client/Server sideBoth client and server-sideSpecially used in client-side
File Extension.js. ts or .tsx
TimeFasterTakes time to compile the code
Data BindingNo concept of types and interfaces availableConcepts like types and interfaces used to describe the data being used.
AnnotationsAnnotations not requiredCode must be annotated constantly to get the most out of TypeScript Features.
SyntaxAll the statements are written within the Script tag.
The browser program starts interpreting all the text between these tags as a script<script>// javascript code</script>
A TypeScript program is composed of:
Modules
Functions
Variables
Statements
Expressions
Comments
Static TypingThere is no concept of Static typing in JavaScriptSupports static typing.
Support for ModulesDoes not support modulesGives support for modules
InterfaceDoes not have an interfaceHas an interface
Optional parameter functionDoes not supportSupports
Prototyping FeatureDoes not have any such featureHas a feature of prototyping
Community of developersAs JavaScript occupies the major chunk of codes, it is widely accepted and used by the programming communityTypeScript is new and has a relatively smaller community base.
Preference to chooseJavaScript is preferable to use in small coding projects.TypeScript is an object-oriented language which makes the code more consistent, clean, simple and reusable. So it is better to use TypeScript for large projects.

Example of TYPESCRIPT code

var message:string =“Hey People”console.log(message)

On compiling, it will generate following JavaScript code.

var message = “Hey People”;
console.log(message);

First line declares a variable by the name message.
Second-line prints the variable’s value to the prompt.
Here, console refers to the terminal window and the function log () is used to display text on the screen.

Example of JAVASCRIPT code:

<html>
<body>
<script
language=”javascript”
type=”text/javascript”>
<!–
document.write
(“Hello World!”)
//–>
</script>
</body>
</html>

Current Trend of TypeScript and JavaScript

Javascript vs Typescript | Edureka Blogs | Edureka

After that face-off between Typescript vs JavaScript, you must have a clear idea on which language suits you better. Now, let’s conclude this article by having a final peek into which one is better in a broader sense.

Which one is better?

As discussed in the article, TypeScript is a superset of JavaScript which means that TypeScript is JavaScript with additional features. It compiles to simple JavaScript which can be used for any JavaScript Code so, using TypeScript is more advantageous. Although JavaScript is widely used, because of TypeScript’s many advantages and features over JavaScript, it’s popularity and adoption is increasing drastically by the day. But TypeScript can never replace JavaScript as TypeScript at its core is JavaScript. However, it may replace the way people write code for web applications.

Now that you know about TypeScript vs JavaScript, check out the Web Development Certification Training by Edureka. Web Development Certification Training will help you Learn how to create impressive websites using HTML5, CSS3, Twitter Bootstrap 3, jQuery and Google APIs and deploy it to Amazon Simple Storage services(S3).

Got a question for us? Please mention it in the comments section of “TypeScript vs JavaScript” and we will get back to you.

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