TypeScript

When JavaScript was developed the JavaScript development team introduced JavaScript as a client-side programming language. But when people were using JavaScript then developers get to know that JavaScript can be used as a server-side programming language also. But When JavaScript was growing then the code of JavaScript became complex and heavy.

Both the methods Type and the Interface are used to describe the structure of the objects in TypeScript. But holds some specific features that will be helpful according to the situation, choosing between them and totally depends on the developer.

TypeScript is a JavaScript-based programming language with a typed syntax. It provides improved tools of any size. It adds extra syntax to JavaScript. This helps in facilitating a stronger interaction between you and your editor. It also helps in catching the mistakes well in advance.

TypeScript 3.8 supports the private keyword to declare its members private. And the private fields in TypeScript are the ones newly proposed for JavaScript. These fields are preceded by #.

ES6 is also known as ECMAScript 2015 as it is released in 2015. Its class allows the developers to instantiate an object using the new operator, using an arrow function, in case it doesn’t need to use the function keyword to define the function, also return keyword can be avoided to fetch the computer value.

Flow is developed and maintained by Facebook. It is a static type checker, designed to quickly find errors in JavaScript applications. Nothing more, nothing less. It’s not a compiler, but a checker. It can work without any type of annotations and it is very good at inferring types. To enable type checking in flow add // @flow at the top of the file. It checks types locally and doesn’t have a language server or type definitions like TypeScript.

TypeScript is a superset of JavaScript, a statically aggregated language to compose straight forward JavaScript code. TypeScript gives discretionary static composing, classes, and interface, and is thought to have better code organizing and object-arranged programming procedures. TypeScript likewise considers better advancement time device uphold and can expand the language past the standard decorators. Besides, it tends to be changed over to plain JavaScript, obviously.

Whenever a variable is created, the intention is to assign some value to that variable but what type of value can be assigned to that variable is dependent upon the datatype of that Variable. In typeScript, type System represents different types of datatypes which are supported by TypeScript. The data type classification is as given below:

Variable: Variable is a named place in memory where some data/value can be stored. According to the word variable, it can be said that the value of a variable can be changed/vary. While declaring a variable, some rules have to be followed: