According to this[1], as of 2 years ago, hello world was only 2.63KB. It&#x27;s probably even better now as there have been several releases in the past 2 years.<p>[1] - <a href="https:&#x2F;&#x2F;github.com&#x2F;scala-js&#x2F;scala-js&#x2F;issues&#x2F;4#issuecomment-20937230" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;scala-js&#x2F;scala-js&#x2F;issues&#x2F;4#issuecomment-2...</a>