i have one arrow function and i want to make it method, java script code example

Example 1: javascript arrow function

// Non Arrow (standard way)
let add = function(x,y) {
  return x + y;
}
console.log(add(10,20)); // 30

// Arrow style
let add = (x,y) => x + y;
console.log(add(10,20)); // 30;

// You can still encapsulate
let add = (x, y) => { return x + y; };

Example 2: arrow func in javascript

const greet = (who) => {
  return `Hello, ${who}!`;
};

greet('Eric Cartman'); // => 'Hello, Eric Cartman!'