[Codewars] Hello, Name or World! (8 kyu) / JavaScript

https://www.codewars.com/kata/57e3f79c9cb119374600046b

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DESCRIPTION:

Define a method hello that returns "Hello, Name!" to a given name, or says Hello, World! if name is not given (or passed as an empty String).

Assuming that name is a String and it checks for user typos to return a name with a first capital letter (Xxxx).

Examples:

* With `name` = "john"  => return "Hello, John!"
* With `name` = "aliCE" => return "Hello, Alice!"
* With `name` not given 
  or `name` = ""        => return "Hello, World!"

 

코드

function hello(name) {
  if(!name) return "Hello, World!";
  name = name[0].toUpperCase() + name.slice(1).toLowerCase();
  return `Hello, ${name}!`;
}