doctype 5
html(lang="en")
  head
    title= Chat
    meta(name="viewport",content="width=device-width, initial-scale=1.0")
    link(rel="stylesheet",href="/css/application.css")
  body
    #chatWindow
      #messageTarget
      #sendWindowBuffer
    #sendWindow
      form#sendForm
        span#sendButtonWrapper
          button#sendButton.btn Send
        span#sendInputWrapper
          input(name="message",autocomplete="off")#sendInput
    script(type="text/javascript",src="/js/jquery-2.0.3.min.js")
    script(type="text/javascript",src="/socket.io/socket.io.js")
    script(type="text/javascript",src="/js/application.js")
    script(type="text/javascript",src="/js/focus.js")

doctype html
html(lang="en")
  head
    title= Chat
    meta(name="viewport",content="width=device-width, initial-scale=1.0")
    link(rel="stylesheet",href="/css/application.css")
  body
    #chatWindow
      #messageTarget
      #sendWindowBuffer
    #sendWindow
      form#sendForm
        span#sendButtonWrapper
          button#sendButton.btn Send
        span#sendInputWrapper
          input(name="message",autocomplete="off")#sendInput
    script(type="text/javascript",src="/js/jquery-2.0.3.min.js")
    script(type="text/javascript",src="/socket.io/socket.io.js")
    script(type="text/javascript",src="/js/application.js")
    script(type="text/javascript",src="/js/focus.js")

Update for new version of jade
Update for new version of jade
