Handle empty args that's passed to a function in JavaScript

handleEmptyArgs.js

/**
 * Handle empty args that's passed to a function in JavaScript
 * @author JSX Clan <jsxclan.dev@gmail.com>
 */

const isRequired = (name) => {
  throw Error(`${name} is missing.`);
}

const setUsername = (username = isRequired('Username')) => {
  console.log(`Username: ${username}`);
  // Do something with 'username'
  // If 'username' is not provided,
  // these lines of code will never be reached.
}

setUsername() // Username is missing.
setUsername('jsxclan') // Username: jsxclan