deck.events.js

deck.events.js

An extension for deck.js allowing you to execute Javascript when a slide becomes/leaves the current, next, or previous slide.

Requirements

deck.js

Events

Each event is triggered “on” the slide on which the event occurs (see Example) and given a single argument – the direction (see Direction)

  • deck.becameCurrent: Triggered when a slide becomes the current one (to in deck.change).
  • deck.lostCurrent: The slide is no longer “current” (from in deck.change).
  • deck.becamePrevious: The slide (by order) just before the current slide. (to - 1 in deck.change).
  • deck.becameNext: The slide (by order) just after the current slide. (to + 1 in deck.change).
  • deck.lostPrevious: The slide (by order) just before the last current slide. (from - 1 in deck.change).
  • deck.lostNext: The slide (by order) just after the last current slide. (from + 1 in deck.change).

Direction

Each event is given a direction that helps determine whether the user is moving forward or backward in the slide stack. It is provided as an argument for the event and can be either forward or reverse. Essentially:

  if(from < to){
    direction = "forward";
  }
  else{
    direction = "reverse";
  }

Example

If you put a placeholder slide <div id="showGraph" class="slide"></div> into your source, this event will display a Javascript graph when you visit the slide (forward) and remove it if you hit the back arrow and return to the slide.

$("#showGraph").bind('deck.becameCurrent', function(ev, direction) {
  if(direction == "forward"){
    animateGraphIn();
  }
  else{
    animateGraphOut();
  }
});