js class methods code example

Example 1: 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!

Example 2: javascript create class

class Person {
 constructor(name, age) {
   this.name = name;
   this.age = age;
 }
  present = () => { //or present(){
  	console.log(`Hi! i'm ${this.name} and i'm ${this.age} years old`) 
  }
}
let me = new Person("tsuy", 15);
me.present();
// -> Hi! i'm tsuy and i'm 15 years old.

Example 3: get methods of class javascript

class Hi {
	constructor() {
      console.log("hi");
    }
   	my_method(){}
  	static my_static_method() {}
}

function getMethods(cl) {
  return Object.getOwnPropertyNames(cl.prototype)
}

console.log(getMethods(Hi)) // => [ 'constructor', 'my_method' ]

Example 4: javascript create class

class Car {
  constructor(brand) {
    this.carname = brand;
  }
}

Example 5: es6 class example

class Polygon { 
   constructor(height, width) { 
      this.height = height; 
      this.width = width; 
   } 
}