JAVASCRIPT

create element javascript with class

// create div element by javascript with class

var div = document.createElement('div');
div.className = "div1";

javascript class

class ClassMates{
	constructor(name,age){
    	this.name=name;
      	this.age=age;
    }
  	displayInfo(){
    	return this.name + "is " + this.age + " years old!";
    }
}

let classmate = new ClassMates("Mike Will",15);
classmate.displayInfo();  // result: Mike Will is 15 years old!

javascript create element with class

Let suppose we are creating a div using javascript create element
// create a new div element 
	var newDiv = document.createElement("div"); 
// assigning class name to the new div
	newDiv.className = "className";

class element in javascript

elmnt.classList.add("YourClass");

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());

js create element with class

var element =document.createElement("span");
        element.className = "aClassName";

javascript class

class Rectangle {
  constructor(height, width) {
    this.height = height;
    this.width = width;
  }
  // Getter
  get area() {
    return this.calcArea();
  }
  // Method
  calcArea() {
    return this.height * this.width;
  }
}

const square = new Rectangle(10, 10);

console.log(square.area); // 100

how to create a class javascript

class Person {
	constructor(name, age) {
		this.name = name;
		this.age = age;
	}
	displayInfo() {
		return this.name + ' is' + this.age + " years old";
	}
}

const Anthony = new Person('Anthony', 32);

js class syntax

// method 1

function nested(name , age , color){
    this.name = name;
    this.details = { 
        age : age,
        color : color
    }
}

let nestedObj = new nested( "Elroi" , 22 , "blue");
 console.log(nestedObj)


// method 2
class Nested2{
    constructor(name , age , color){
        this.name = name;
        this.details = {
            age : age,
            color : color
        }
    };

    displayInfo(){
        console.log(`${this.name} ${this.details.age} ${this.details.color} `)
    } 
}

let aaa  = new Nested2("Ean" , 14 , "black");
aaa.displayInfo(); 

javascript class

//class in es6 are just functional constructor.
class PersonES6{
  constructor(firstname,lastname,age){
    this.firstname= firstname;
    this.lastname=lastname;
    this.age=age
  }
  aboutPerson(){
  console.log(`My name is ${this.firstname} ${this.lastname} and I am ${this.age} years old`)
  }
}

const shirshakES6= new Person('Shirshak','Kandel',25)
shirshakES6.aboutPerson();

javascript class

class Rectangle {
  constructor(hauteur, largeur) {
    this.hauteur = hauteur;
    this.largeur = largeur;
  }
}

how to create element with class in javascript

adding element classes in js

how to define class in javascript

const p = new Rectangle(); // ReferenceError
class Rectangle {}
// functions can be called even before they are defined, but classes must be defined before they can be constructed.

javascript class

// unnamed
let Rectangle = class {
  constructor(height, width) {
    this.height = height;
    this.width = width;
  }
};
console.log(Rectangle.name);
// output: "Rectangle"

// named
let Rectangle = class Rectangle5 {
  constructor(height, width) {
    this.height = height;
    this.width = width;
  }
};
console.log(Rectangle.name);
// output: "Rectangle2"