declare methods of classjavascript code example

Example 1: javascript classes

class SayHelloTo {
  name (to) {
    console.log(`Hello ${to}`);
  }
  constructor (to) {
    this.name(to);
  }
}
const helloWorld = new SayHelloTo(World);

Example 2: javascript classes

let Person = class {
  constructor(firstName, lastName) {
    this.firstName = firstName;
    this.lastName = lastName;
  }
}