8-method.js

'use strict';

const powName = 'pow';

const obj1 = {
  fn1: function inc(a) {
    return ++a;
  },
  sum(a, b) {
    return a + b;
  },
  inc(a) {
    return ++a;
  },
  max: (a, b) => (a > b ? a : b),
  min: (a, b) => (a < b ? a : b),
  dec: (a) => --a,
  [powName](a, b) {
    return a ** b;
  },
};

console.log(`obj1.fn1.name = ${obj1.fn1.name}`);
console.log(`obj1.sum.name = ${obj1.sum.name}`);
console.log(`obj1.inc.name = ${obj1.inc.name}`);
console.log(`obj1.max.name = ${obj1.max.name}`);
console.log(`obj1.min.name = ${obj1.min.name}`);
console.log(`obj1.dec.name = ${obj1.dec.name}`);

console.log(`obj1.fn1(5) = ${obj1.fn1(5)}`);
console.log(`obj1.sum(1, 3) = ${obj1.sum(1, 3)}`);
console.log(`obj1.max(8, 6) = ${obj1.max(8, 6)}`);

console.log(`obj1.pow(8, 6) = ${obj1.pow(8, 6)}`);
console.log(`obj1['pow'](8, 6) = ${obj1['pow'](8, 6)}`);