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Why You Should Use TypeScript?

Why You Should Use TypeScript?

Why You Should Use TypeScript? – TypeScript is a superset of JavaScript with a single open-source compiler and is mostly developed by one company: Microsoft. The purpose of TypeScript is to use a type system to help discover problems early and make JavaScript development more efficient. Why You Should Use TypeScript? It is a superset of JavaScript with a single open-source compiler and is mostly developed by one company: Microsoft.

JavaScript is a programming language created by the ECMA’s Technical Committee 39, which is made up of a diverse range of stakeholders. ECMA hosts the TC39 committee, which is an internal standards organization. There are a variety of JavaScript implementations available from a variety of suppliers (e.g. Google, Microsoft, Oracle, etc.). 

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1. Relationship between TypeScript and other JavaScript-targeting languages

In comparison to other languages that compile to JavaScript, TypeScript has a unique approach. TypeScript is a superset of JavaScript, and JavaScript code is valid TypeScript code. You can almost immediately start utilizing TypeScript by renaming your .js scripts to .ts files. TypeScript files are compiled to intelligible JavaScript, allowing for easy migration back and knowledge of the produced TypeScript. This improves on JavaScript’s strengths while addressing its flaws.

On the one hand, there are future-proof technologies that compile modern ECMAScript standards to older JavaScript versions, the most popular of which being Babel. On the other side, there are languages that target JavaScript that is completely different from JavaScript, such as CoffeeScript, Clojure, Dart, Elm, Haxe, Scala.js, and many others. These languages, while potentially superior to where JavaScript’s future may lead, have a larger risk of not gaining enough popularity to ensure their survival. Some of these languages may also have a harder time finding experienced developers, although the ones you can find are often more enthusiastic.

2. Strict null checks in TypeScript

Bugs in JavaScript code frequently produce runtime errors such as cannot read property 'x' of undefined or undefined is not a function. Because you can’t utilize a variable that the TypeScript compiler doesn’t know about out of the box, TypeScript decreases the chances of these kinds of problems (with the exception of properties of any type variables). However, it is still possible to make a mistake and use an undefined variable. However, by using non-nullable types in the current version of TypeScript, you can completely eliminate these kinds of issues.

3. Compilation in TypeScript

To compile TypeScript’s code to JavaScript code, you’ll require a build process. The build process takes only a few seconds on average, depending on the size of your project. The TypeScript compiler supports incremental compilation, which allows for faster compilation of subsequent changes.

The TypeScript compiler has the option of including source map information in the generated .js files or creating separate .map files. Debugging tools like Chrome DevTools and other IDEs can leverage source map information to link lines in the JavaScript to the TypeScript lines that generated them. This allows you to set breakpoints and check variables directly on your code during runtime. Source map information is useful and has existed long before TypeScript, but debugging TypeScripts is more difficult than debugging JavaScript directly.

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The TypeScript compiler can also generate intercepting code based on decorators, generate module loading code for various module systems, and parse JSX, among other things. Aside from the Typescript compiler, you’ll almost certainly need a build tool. If you want to compress your code, for example, you’ll need to add additional tools to your build process.

4. Enhanced IDE support

The TypeScript development experience is far superior to that of JavaScript. The TypeScript compiler sends extensive type information to the IDE in real-time. This has a number of significant advantages. You can conduct refactorings like renames across the entire codebase with TypeScript, for example. You can get inline help on any functions a library has to offer by using code completion. There’s no need to recall them or search them up in a database. While you’re coding, a red squiggly line appears in the IDE to indicate a compilation issue. Overall, compared to working with JavaScript, this allows for a huge increase in productivity. It is possible to devote more time to developing and less time to troubleshooting.

Visual Studio Code, WebStorm, Atom, and Sublime are just a few examples of IDEs that have good TypeScript support.

5. Interoperability with JavaScript

Because TypeScript is so closely related to JavaScript, it offers excellent interoperability, although working with JavaScript libraries in TypeScript requires some additional effort. TypeScript definitions are required so that the TypeScript compiler recognizes that statements like _.groupBy, angular.copy, and $.fadeOut are not in reality unlawful. These functions’ definitions are stored in .d.ts files.

The TypeScript compiler natively understands Npm modules that arrive pre-packaged with their own type definitions (see documentation). Someone has already made type definitions available through another npm module for pretty much any other semi-popular JavaScript library that does not contain its own. These modules are prefixed with “@types/” and are from the DefinitelyTyped Github repository.

6. Support for modern JavaScript features

The ECMAScript standards standardized the JavaScript language (not the runtime). All ECMAScript standards are not supported by all browsers and JavaScript runtimes (see this overview). Many of the most recent ECMAScript capabilities can be used using TypeScript, which converts them to older ECMAScript targets of your choice (see the list of compile targets under the —target compiler option). This means you may use new capabilities like modules, lambda functions, classes, the spread operator, and destructuring while keeping older browsers and JavaScript runtimes backward compatible.

7. Type system with advanced features

Because JavaScript is interpreted rather than compiled, type support is not part of the ECMAScript standard and is unlikely to ever be. Interfaces, enums, hybrid types, generics, union/intersection types, access modifiers, and much more are all part of TypeScript’s type system. The TypeScript official website provides an overview of these features. The type system in Typescript is comparable to that of most other typed languages, and in some circumstances, much more sophisticated.


Overall, even if you don’t use TypeScript to its full potential, it’s a useful tool to have in your toolbox. It’s simple to start small and gradually expand your capabilities, learning and adding new features as you go. There’s no need to be worried about TypeScript because it’s practical and inviting to beginners. I hope you find this post helpful in your learning journey. If you require assistance or have any questions, please post them in the comments section.

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