ReactNative King

 Component Name: ecamaScript.js ------------------------------------------------------------------ class Users { constructor (){ this . name = "Abhishek Pratap Singh" ; this . age = 28 ; } getName (){ return this . name ; } getAge (){ return this . age ; } } var user = new Users (); console . log ( user . getName (), user . getAge ());

 file name: main.js ---------------------------------------------- var name = "pradeep" ; var user =( a , b ) => { var c = a + b ; console . log ( c ); } user ( 5 , 5 ); module. exports . abc = name ; ------------------------------------------------ -------------------------------gObject.js //__dirname, directory name janne ke liye //__filename, filename janne ke liye //require, // dusre folder ki file ko access ke liye //console, //buffer, //module, //exports // const { abc } = require("./main"); // console.log(__dirname); // console.log(__filename); // var main =require('./main'); console . log ( abc . main );

 file name: main.js ---------------------------------------------------------------------- var laptop = function (){ console . log ( "This is anonymous function " ); } laptop ();

  // Rest Parameters in ES6 JavaScript // old style // this is the problem when we have two many parameters // function sum(a,b,c,d,e,f) // { // console.log(a+b+c+d+e+f); // } // sum(1,2,3,4,5,6); // ES6 style // rest parameter as a array kaunt karke deta hai function sum (... inputs ) { console . log (... inputs ) let total = 0 ; for ( let i of inputs ){ total += i ; } console . log ( total ); } sum ( 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 );

// es6 Defaul Parameters in Javascript const multi = ( a , b = 5 ) => { console . log ( `the muliplication of two no is ${ a * b }` ); } multi ( 4 );

  // Fat Arrow Function in JavaScript // Old style es5 function // var sum = function() // { // var a = 5; // var b = 10; // return a+b; // } // console.log(sum()); // es6 Latest Fat Arrow Function // const sum = () =>{ // let a = 65; // let b = 10; // return a+b; // } // console.log(sum()); // es6 latest another style let a = 20 ; let b = 50 ; const sum = () => a + b console . log ( sum ());