TypeScript

TypeScript is a superset of JavaScript. When TypeScript is compiled, it transpiled to JavaScript.

Features:

• Static Typing
• Interfaces
• Class Properties
• Access modifiers (Public, Private)

Static Typing:

let name: string
let age: number
let dob: data

Interfaces:

interface IEmp {
     name: string
     age?: number //Optional property
     dob: date
}

let myEmp: IEmp

Class Properties:

class Employee {

name: string
dob: date
constructor (name){
       this.name = name
}

}

Access Modifier:

Class members are public by default in both ES6 and TypeScript.

class Employee {

private name: string
private getSalary() {
     console.log(‘Salary of ’ + this.name + ‘ is $5000.00‘)
}

}

let myEmp = new Employee ()
console.log(myEmp.name) //Compile time error

Thanks,
Bimal