title: Modern or Non-deprecated way to detect flash player with js/jquery?
body: <p>First of all, sorry for ressurrecting this question here.
  I've been trying for two days how to reach this job using javascript/jquery and i think i've read all stack overflow and other blogs posts about that, so please, don't mark it as duplicated because I can't use out-dated scripts from 2012 now in 2017.</p>
  
  <p>I've a single page that redirects to a third party e-learning platform where some content needs flash to work. Many users don't care about which software is installed on their machines (what a new, huh) so i need to detect it and show the tipical message "please install/update flash player clicking here", but i cannot find a "modern" script/way to do this, in any place, simplified, if possible.</p>
  
  <p>All scripts i've tried are deprecated or returns false in all browsers, even i've newest version of flash installed and active.</p>
  
  <p>Anny help will be appreciated (except links to older posts or scripts that don't work nowadays, obviously).</p>
  
  <p>Thanks a lot!</p>