Javascript/static.js at main · Anilnayak126/Javascript · GitHub

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// static  = keyword that defines properrties or  methods that belongs
//           to  a  class itself rather than the object created
//           from that class (class owns anything static, not  the object)


//------------------------------------ example -1
// class mathUtil{
//     static PI = 3.14159;

//     static getDiameter(radius){
//         return radius * 2;
//     }

//     static getcirCumference(radius){
//         return 2 * this.PI * radius
//     }
//     static getarea(radius){
//         return this.PI + radius * radius
//     }

// }


// console.log(mathUtil.PI);
// console.log(mathUtil.getDiameter(12));
// console.log(mathUtil.getcirCumference(20));
// console.log(mathUtil.getarea(20));

//-------------------------------------- example - 2

class user{

    static usercount = 0;

    constructor(username){
        this.username = username
        user.usercount++;
    }
    sayhello(){
        console.log(`hii  i am ${this.username}`);
    }

    static myusercount(){
        console.log(`currently  u have ${user.usercount} users.`);
    }

}

const user1 = new user('Anil')
const user2 = new user('Sunil')
const user3= new user('Sayani')

user1.sayhello()
console.log(user1.username);
user2.sayhello()
console.log(user2.username);
user3.sayhello()
console.log(user3.username);


user.myusercount();