Optional Parameters In TypeScript

[!INFO]-
topic: 🦒 TypeScript
links: What is TypeScript
source: TypeScript course by the native web
tags: #permanent-note #published

Last Modified: =dateformat(this.file.mtime, "MMM. dd, yyyy - HH:mm")

You can define parameters to be optional with a ?

// Optional parameters
const getFullName = function (firstName: string, lastName?: string): string {
  if (!lastName) {
    return firstName;
  }

  return `${firstName} ${lastName}`;
};

const fullName = getFullName('Steve', 'Jobs');