title: Is it possible to trigger share menu on smartphones (via HTML/JS)?
body: <p>Is there an existing possibility to trigger the share functionality in local browsers on smartphones via HTML or JavaScript?</p>
  
  <p>Of course there are many services which provide a share button. But when I e.g. want to share a website on facebook, I need to be logged in to facebook in the browser I am currently using.</p>
  
  <p>Almost all browsers got an own share functionality build in, which triggers a system menu to choose which app you want to use to share:</p>
  
  <p><img src="https://i.stack.imgur.com/DdR2p.png" alt="System share menu in android os"></p>
  
  <p>This question is about: How to trigger this menu?</p>
  
  <p>I know it is possible to trigger a phone call with a specified prefix in href attribute of links, like <code>tel:</code> or <code>callto:</code>. Maybe such a shortcut for this share menu is also existing? Or some javascript code? Or a totally different way how to do it?</p>
  
  <p>Thanks in advance.</p>