Swiping example

swipe.js

var start_location, end_location

$portfolio_modal = $('#portfolio-modal');

$portfolio_modal.bind('touchstart', function(e) {
  start_location = e.originalEvent.targetTouches[0].pageX;
  return end_location = 0;
});

$portfolio_modal.bind('touchmove', function(e) {
  return end_location = e.originalEvent.targetTouches[0].pageX - start_location;
});

$portfolio_modal.bind('touchend', function(e) {
  if (Math.abs(end_location) < 200) return;
  if (end_location > 0) {
    return prev_item();
  } else {
    return next_item();
  }
});