Articles and code samples created in response to many frequently asked questions about TypeScript

What is TypeScript? Where is TypeScript used?

TypeScript is a programming language developed by Microsoft and considered as a super-set of JavaScript. It includes advanced features such as static typing, classes and interfaces that are not present in JavaScript, which makes your code more understandable and maintainable in larger and more complex projects. TypeScript code is compiled to JavaScript and outputs executable JavaScript code, making it compatible with modern browsers or JavaScript runtimes. TypeScript is supported by popular JavaScript frameworks and libraries such as AngularJS. It is also supported by popular development environments like Visual Studio Code, WebStorm, and others, making it easy and efficient to use. TypeScript also supports many popular libraries and frameworks that are widely used in JavaScript, such as React, Vue.js, Node.js, and many more. This allows your TypeScript code to be compatible with other code and makes it more flexible.

What is the difference between type and interface in TypeScript? How to use type and interface?

In TypeScript, the main difference between type and interface is their intended use. The type keyword allows an existing type to be renamed or merged into one. For example, in the following example, a "Person" type is created and contains a "name" and "age" properties:   type Person = { name: string, age: number }; The interface keyword defines an interface for classes or objects. This interface specifies which properties and methods should be contained within this class or object. For example, in the following example, a "Person" interface is created and includes a "name" and "age" properties:   interface Person { name: string; age: number; } The main difference between these two keywords is that type provides for renaming or combining a type, whereas interface provides for defining an interface. Typescript's type alias and interfaces are different. Interfaces specify what properties and methods a class or object must contain, while type alias allows a type to be renamed or combined.