title: Is is possible to create a "send-message-to(..)" URL for Google Hangouts?
body: <p>With mail you can create an URL like <code>mailto:john.doe@example.com?subject=The%20message</code>. If you click that link, an e-mail message editor will be opened with the provided emailaddress and subject.</p>
  
  <p>With WhatsApp you can do the same: <code>https://wa.me/1234567890?text=The%20message</code>.</p>
  
  <p>It it also possible to do this with Google Hangouts, so it opens a chat with a provided emailaddress? When I check de <a href="https://developers.google.com/hangouts/chat/reference" rel="nofollow noreferrer">developer documentation</a> I only see REST documentation for bots and such...</p>