JavaScript vs TypeScript

You may have just recently heard about TypeScript. That is totally fine. Obviously, when people start learning how to develop web pages and websites, JavaScript along with HTML and CSS are the very first subjects to learn. Afterward, many of these people stick with JavaScript and never get the chance to meet other similar programming languages. But, here we are! Some of you are probably wondering what TypeScript actually is and whether it is better. Below, we are going to see what TypeScript is, how it is different from JavaScript, and whether it is really better or not. Continue reading!

What is TypeScript?
JavaScript is a dynamic, weakly-typed programming language that is often used to create interactive and dynamic web pages and websites. It typically runs on the client side, though there are now server-side JavaScript implementations, most notably Node.js. It is great, but it may have some weaknesses. It is pretty difficult to read by humans. It does not give good early error detection due to being dynamic and weakly-typed. And, historically, JavaScript wasn’t meant for large apps (those with thousands of lines of code) – today, apps running millions of lines of code are pretty common. (Let’s see : JavaScript vs Ruby)

TypeScript is a free, open-source programming language that is developed and maintained by Microsoft. TypeScript is a strict syntactical superset of JavaScript. In other words, it does not reduce anything from JavaScript; instead, it adds more features and capabilities. Most notably, it adds optional static typing. When executed, the TypeScript code transcompiles into JavaScript, meaning that all browsers and servers that support JavaScript would support TypeScript, too.

The Advantages of TypeScript
Primarily, TypeScript provides optional static typing, classes, and interfaces, all of which are really useful. It makes the code much more readable by humans. An IDE would provide a richer environment in which you can spot common errors as you type the code, allowing for effective early error detection. Initially, the only compatible IDE was Microsoft Visual Studio, but today there are other IDEs that support TypeScript too. In addition, TypeScript also comes with many features of the latest ECMAScript version (including lambda functions, modules, classes), filling in the gap that JavaScript developers always had.

By using a compatible IDE, you can also enjoy the code prompting feature. TypeScript fully supports JavaScript’s syntax in addition to its own syntax. One interesting use of TypeScript is that some people now use it as an instant code correction module for JavaScript files, simply by saving the files with the TypeScript filename extension.

JavaScriptTypeScript
- Dynamic, weak typing- Optional static typing and classes
- Pretty difficult to read- Much more readable
- Low IDE capabilities- Great IDE capabilities, allowing better early error detection
- Does not support some features of the latest ECMAScript version- A superset of JavaScript that also supports many features of the latest ECMAScript version

Conclusion
TypeScript is really a great programming language that offers several advantages over JavaScript. It still transcompiles to JavaScript, meaning that all browsers and servers that support JavaScript will not have any problem with TypeScript. It introduces optional static typing, classes, and interfaces, which are really helpful for all developers.

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