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new keywork in js

Fahad Shaikh answered on September 25, 2022 Popularity 9/10 Helpfulness 4/10

answer new keywork in js

new keywork in js

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// New keyword do two things 
// 1.) Make an empty object
// 2.) return this
// 3.) assign the function prototype to proto

// Example 

function createUser(firstName , age) {
  this.firstName = firstName;
  this.age = age;
}

createUser.prototype.about = function(){
  console.log(`Name of user is ${this.firstName} age of user is ${this.age}`);
}

const user1 = new createUser("Fahad", 23);

// user1.about();
// So if we're defining a function that'll call with new keyword then we make the function and assign capital letter to fast alphabet to tell other developers that it'll call with new keyword otherwise it'll not gonna work...

// EXAMLE
function Hello(firstName) {
  this.firstName = firstName;
}

Hello.prototype.hello = function (){
  console.log("Hello", this.firstName);
}

const helloTofahad = new Hello("Fahad", 34);

console.log(helloTofahad.hello())

// That's how it'll work

Popularity 9/10 Helpfulness 4/10 Language javascript

Source: Grepper

Tags: javascript keyword

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Contributed on Sep 25 2022

Fahad Shaikh

0 Answers Avg Quality 2/10

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