title: Make HTML button appear pressed with JavaScript?
body: <p>How can I make an HTML button looks like pressed via JavaScript? </p>
  
  <p>I have a button that is sending a network message while pressed and sending another network message when released. </p>
  
  <p>This specific named button may be displayed on more than once in a page or more than one device. So, if any of the identical purpose buttons pressed, I need to make the rest of the copies look like pressed. </p>
  
  <p>How can I achieve that behaviour? </p>