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What is Typescript?
Typescript (TS or .ts) is a multi-paradigm computer programming language designed and released by Microsoft in 2012. As a superset of Javascript (JS/ .js), the language comes with an additional layer of features - the type system (hence the name Typescript). These include optional typing, type annotations, modules, interfaces, etc.
Thanks to its typing system, the language is capable of generating types based on the value provided. Below is an example of how it works:
let helloWorld = "Hello World";
let helloWorld: string
Why use Typescript over Javascript?
In 2020, a survey was conducted on StackOverflow to find out which programming languages are most loved by developers. Typescript ended up in the 2nd position, surpassing Python and beat out by only Rust. Up to now, the language has been adopted by various multi-national organizations - including Slack, Airbnb, KAVAK, and Bitpanda.
Below are 3 major reasons for you to consider doing the same thing:
Improved coding efficiency
For those who have been through the coding process before, you must understand how "intense" it is. Just a small mistake (e.g: missing a comma) may give rise to devastating consequences.
Typescript was created to deal with the complexities of coding with Javascript. By implementing additional syntaxes and function descriptions, the language enables developers to "notice" errors in their editing screen early - thereby improving efficiency and saving them from potential frustration at the end of the day.
Additional syntaxes
An example of Typescript “catching” mistakes
Function description
‶TypeScript was such a boon to our stability and sanity that we started using it for all new code within days of starting the conversion.″
Felix Rieseberg at Slack
Amazing transcompilation
Typescript is, essentially, an augmented version of Javascript. Therefore, don't be afraid to implement it for your halfway running Javascript coding project - the former can swiftly be converted to the latter (and vice versa)! What you only need to do is to remove the function descriptions in the TS file - and boom! Now you have a JS file ready for use. In fact, anywhere JS is compatible (browsers, apps, Nodejs, Deno, etc.), so is TS.
In addition, the programming language also offers support for keywords such as class and module. For example, let's say a class is defined as:
// class define in TypeScript
class VirtualPageTracker extends Tracker {
  private virtualPageName: string = '';
  constructor(name) {

getName(): void {
  return this.virtualPageName;

static getTrackerName(): string {
  return  'VirtualPageTracker';
With TS, the above code will be transcompiled into
var __extends = (this && this.__extends) || function (d, b) {
  for (var p in b) if (b.hasOwnProperty(p)) d
  = b
  function __() { this.constructor = d; }
  d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
// class define in TypeScript
var VirtualPageTracker = (function (_super) {
  __extends(VirtualPageTracker, _super);
  function VirtualPageTracker(name) {
  _super.call(this, name);
  this.virtualPageName = '';
VirtualPageTracker.prototype.getName = function () {
  return this.virtualPageName;
VirtualPageTracker.getTrackerName = function () {
  return 'VirtualPageTracker';
  return VirtualPageTracker;
Incredible scalability
Type safety is always a concern when it comes to a web/app product. Typescript utilizes static type checking to analyze the source code, which makes the safety verification process much less of a hassle to developers. In fact, research has revealed that about 15% of JS bugs are detectable with TS.
For large, complicated system development projects for enterprises, TS is definitely the superior choice to Javascript.
How does Typescript work?
TS works in pretty much the same way as JS - with the added bonus of enhanced syntax for the compiler to run its check. After the check is completed, it is compiled to Javascript.
What is Typescript used for?
As a subset of JS, TS is a great choice for front-end and back-end development. The language is suitable for execution on the client as well as the server side.
Is Typescript easier than Javascript?
Basically, Typescript is Javascript that comes with documentation readable by compilers. In other words, learning to write TS code is pretty simple - provided that your developers are already familiar with JS.
Due to the amazing versatility that it boasts, transitioning from using JS to TS in your tech stacks is a worthy investment that your organization may want to consider.
Typescript vs Javascript - What are the differences?
Here, we have listed down a few important features to compare between the two languages.
Type of programming languageObject-oriented languageScripting language
Browser executionNot understandable by browsersCan be executed directly in browsers
TypingComes with static typingDynamic typing only
Main benefitMore structured, easy to spot errors due to static typingMore flexible due to not being limited by typing
Class/module supportYesNo
When to useLarge, complex enterprise projectsSmall, simple projects that don’t involve lots of complexities
Is Typescript better than Python?
For those who care about speed and performance, TS is generally the superior choice to Python, especially when we need to conduct memory-consuming tasks such as 3D game designing.
Can Typescript be used with React?
Typescript is an amazing consideration for React apps - the language supports JSX and is capable of modeling patterns in React codes such as useState. A combination of TS and React should result in fewer bugs and more safety for the front end.
What are the different types of TypeScript?
TS supports the same data types as Javascript - along with some additional ones. Some of them include Boolean, Number, String, Array, Tuple, Enum, Unknown, Any, Void, Null and Undefined, Never, Object, etc.
How do I install Typescript?
The easiest - and most stable way - to install it is to use the NodeJS Package Manner (npm) via the command below:
npm install -g typescript.
Before compiling your TS codes, make sure to have Node.js and Git installed already.
Once it is done, it's time to compile files with ts filename.ts.
All in all, Typescript is an amazing choice for web/ app development projects - especially large ones that involve lots of complexities in coding. It doesn't require much to get used to, and can completely transform your coding experience.
We hope that you will find the information we share above useful. For those who are in need of an affordable, yet high-quality, supportive web/app development solution, please reach out to JSLancer for a FREE consultation on how we can help you.