Class Constructor Javascript Code Example

Example 1: es6 class example

<script>    class Student {       constructor(rno,fname,lname){          this.rno = rno          this.fname = fname          this.lname = lname          console.log('inside constructor')       }       set rollno(newRollno){          console.log("inside setter")          this.rno = newRollno       }    }    let s1 = new Student(101,'Sachin','Tendulkar')    console.log(s1)    //setter is called    s1.rollno = 201    console.log(s1) </script>

Example 2: javascript class constructor

class Person {   constructor(name, age) {     this.name = name;     this.age = age;   } }  const person = new Person("John Doe", 23);  console.log(person.name); // expected output: "John Doe"

Example 3: constructor in js

A constructor is a function that creates an instance of a class   which is typically called an “object”. In JavaScript, a constructor gets    called when you declare an object using the new keyword.   The purpose of a constructor is to create an object and set values if    there are any object properties present.

Example 4: javascript class

// Improved formatting of Spotted Tailed Quoll's answer class Person { 	constructor(name, age) { 		this.name = name; 		this.age = age; 	} 	introduction() { 		return `My name is ${name} and I am ${age} years old!`; 	} }  let john = new Person("John Smith", 18); console.log(john.introduction());

Example 5: javascript class constructor

class Cat {         constructor(name, age) {             this.name = name;             this.age = age;         }              	get fullname() {           return this.getFullName()         }         getFullName() {             return this.name + ' ' + this.age         }     }      const run = document.getElementById("run");     run.addEventListener("click", function () {         let Skitty = new Cat('Skitty', 9);         let Pixel = new Cat('Pixel', 6);         console.log(Skitty.getFullName()); // Skitty 9       	console.log(Skitty.fullname); // Skitty 9 => shorter syntax         console.log(Skitty, Pixel);        // Object { name: "Skitty", age: 9} Object {name: "Pixel", age:6}     })

Example 6: js constructor object

function Car(make, model, year) {   this.make = make;   this.model = model;   this.year = year; }  var car1 = new Car('Eagle', 'Talon TSi', 1993);  console.log(car1.make); // expected output: "Eagle"