Type Script

 is a additiondal feature for java script

typescrip= additional +typescript

/*

ES5-

our current browser cannot understand es6

typescript also cannot understand.

**-typescript convert script to javascript,es5-browser and protractor will understand-.

**-scan the existing intenstiosn , symantics

1- npm install -g typescript

2-create a class bascis.ts

3-tsc basics.ts

4-it will create the js file -basics.js

5-run node basics.js

*/

basics.ts

for(var i =0;i<5;i++){setTimeout(function(){console.log(i);},100*i);

}

basics.js

for (var i = 0; i < 5; i++) {

setTimeout(function () { console.log(i); }, 100 * i);

}

Export --

export class classDemo

{

// variable is called in class as property

//Class consists of properties,methods,constructor

//This - refere to current class property

username:string;

password:string;

ssn:number;

//default constructor

constructor(ssn:number){

this.ssn=ssn;

}

//Parameterized constructor

getSsn(){

console.log(this.ssn);

}

getUsername(){

console.log(this.username);

}

setUsername(uName){

this.username=uName;

}

}

// create object of the class, using object call the methods and propertiesof that class

let ocd= new classDemo(1234);

ocd.setUsername('sudheer');

ocd.getUsername();

ocd.getSsn();

import { classDemo } from "./classDemo";

let acc = new classDemo(7777);

acc.getSsn();

******result

bindureddy@sudheerchittireddy Typescript % tsc Access.ts bindureddy@sudheerchittireddy Typescript % node Access.js sudheer 1234 7777