!doctype html
html lang=en
head
  meta charset=UTF-8 
  meta name=viewport content=width=device-width, initial-scale=1.0 
  titleHello Worldtitle
  link href='style.css' rel='stylesheet'
head
body
  h1Hello, world!h1
  button onclick=console.log('hello');Press mebutton
  script defer type=textjavascript src=main.jsscript
body
html