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"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"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>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.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());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}
})class constructor javascript
class prettyMixedGirl {
constructor(name, age, ethnicity, phoneNumber) {
this.name = name;
this.age = age;
this.ethnicity = ethnicity;
this.phoneNumber = phoneNumber;
}
// Method
hi() {
console.log(`Hi! My name is ${this.name}. I am ${this.age} years old. My ethnicity is ${this.ethnicity}. My phone number is ${this.phoneNumber}`);
}
}
// Create new object out of Constructor (Instantiate)
const ashley = new prettyMixedGirl('Ashley', 28, 'Dominican Republican', '313-218-1345');
const luna = new prettyMixedGirl('Luna', 26, 'Chilean', '718-231-1343');
// Initiate a method
ashley.hi(); // Hi! My name is Ashley. I am 28 years old. My ethnicity is Dominican Republican. My phone number is 313-218-1345
luna.hi(); // Hi! My name is Luna. I am 26 years old. My ethnicity is Chilean. My phone number is 718-231-1343Copyright © 2021 Codeinu
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