function forward_trigger(event) {
  if (event.fragment.matches(".fv-fragment")) {
    set_up_timeupdate(event.fragment);
  }
}
// triggered by revealjs's fragmentshown event -> indicates we're going through the slides forwards
triggered by revealjs's fragmentshown event -> indicates we're going through the slides forwards
triggered by revealjs ' s fragmentshown event - > indicates we ' re going through the slides forwards
function forward_trigger(event) {
  if (event.fragment.matches(".fv-fragment")) {
    set_up_timeupdate(event.fragment);
  }
}
function forward_trigger ( event ) { if ( event . fragment . matches ( ".fv-fragment" ) ) { set_up_timeupdate ( event . fragment ) ; } }
triggered by revealjs's fragmentshown event -> indicates we're going through the slides forwards
triggered by revealjs ' s fragmentshown event - > indicates we ' re going through the slides forwards