jsのgetはプロパティのように関数を呼ぶシステム

const obj = {
  log: ["example", "test"],
  get latest() {
    if (this.log.length === 0) return undefined;
    return this.log[this.log.length - 1];
  },
};
console.log(obj.latest); // "test"

class Example {
  get hello() {
    return "world";
  }
}

const obj = new Example();
console.log(obj.hello);
// "world"