Fly Away

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/bundles/anime.umd.min.js"></script>
<script>
  (function () {
    // Fly Away: the element dips for a moment, then tilts and flies off the
    // top, drifting the way it leans as it picks up speed.
    // Usage: <div data-fly-away>…</div>
    // It plays once the element has been in view for data-delay ms. It flies
    // past the top of the nearest container that clips its overflow
    // (overflow: hidden or clip), or of the window, and ends hidden
    // (visibility: hidden) but still taking up its space.
    // Optional: data-tilt (how far it leans, in degrees; negative leans left,
    // default 14; a looping demo leans the other way each time),
    // data-distance (px to fly, fading out, instead of leaving the screen),
    // data-duration (ms, default 900), data-delay (ms in view before it
    // leaves, default 1200), data-loop (fade back in, hold and fly away
    // again), data-hold (ms to stay between exits when looping, default 1400).
    // Script use: animacious.flyAway(el, done) plays it on any element now,
    // using its data-* options, and calls done afterwards.
    var DEFAULTS = { tilt: 14, duration: 900, delay: 1200, hold: 1400 };

    function reduced() {
      return window.matchMedia('(prefers-reduced-motion: reduce)').matches;
    }

    // The top edge the element must fly past to be "off screen".
    function clipTop(el) {
      for (var p = el.parentElement; p && p !== document.body; p = p.parentElement) {
        var s = getComputedStyle(p);
        if (s.overflowX !== 'visible' || s.overflowY !== 'visible') return p.getBoundingClientRect().top;
      }
      return 0;
    }

    function leave(el, dir, done) {
      var d = el.dataset;
      var t = +d.duration || DEFAULTS.duration;
      var tilt = (d.tilt === undefined ? DEFAULTS.tilt : +d.tilt || 0) * dir;
      if (reduced()) {
        anime.utils.set(el, { opacity: 0 });
        if (done) done();
        return;
      }
      anime.utils.set(el, { x: 0, y: 0, rotate: 0, scale: 1 });
      var r = el.getBoundingClientRect();
      // Clear the edge even with the lean dropping one corner.
      var rise = +d.distance || r.bottom - clipTop(el) + r.width * Math.abs(Math.sin(tilt * Math.PI / 180)) + 8;
      var flyProps = {
        y: { to: -rise, ease: 'in(3)' },
        x: { to: rise * Math.tan(tilt * Math.PI / 180) * 0.6, ease: 'in(3)' },
        rotate: { to: tilt, duration: t * 0.5, ease: 'out(2)' },
        scale: { to: 0.9, ease: 'out(2)' },
        duration: t
      };
      if (d.distance) flyProps.opacity = { to: 0, delay: t * 0.3, duration: t * 0.7, ease: 'in(2)' };
      anime.createTimeline({
        onComplete: function () {
          if (done) done();
        }
      })
        // A small crouch, leaning back, before take-off.
        .add(el, { y: 8, rotate: -tilt * 0.3, scale: 0.97, duration: 260, ease: 'out(2)' })
        .add(el, flyProps);
    }

    function cycle(el) {
      var d = el.dataset;
      var s = el._fyw;
      var dir = s.n++ % 2 ? -1 : 1;
      leave(el, dir, function () {
        if (d.loop === undefined || d.loop === 'false') {
          el.style.visibility = 'hidden';
          return;
        }
        // Come back quietly in place, then go again once it's on screen.
        setTimeout(function () {
          anime.utils.set(el, { x: 0, y: 0, rotate: 0, scale: 1, opacity: 0 });
          anime.animate(el, {
            opacity: 1,
            duration: 400,
            ease: 'out(2)',
            onComplete: function () {
              setTimeout(function () {
                if (s.visible) cycle(el);
                else s.waiting = true;
              }, +d.hold || DEFAULTS.hold);
            }
          });
        }, 400);
      });
    }

    window.animacious = window.animacious || {};
    window.animacious.flyAway = function (el, done) {
      leave(el, 1, function () {
        el.style.visibility = 'hidden';
        if (done) done(el);
      });
    };

    function init() {
      var io = new IntersectionObserver(function (entries) {
        entries.forEach(function (e) {
          var s = e.target._fyw;
          s.visible = e.isIntersecting;
          if (!e.isIntersecting) return;
          if (!s.started) {
            s.started = true;
            var wait = e.target.dataset.delay;
            setTimeout(function () { cycle(e.target); }, wait === undefined ? DEFAULTS.delay : +wait || 0);
          } else if (s.waiting) {
            s.waiting = false;
            cycle(e.target);
          }
        });
      }, { threshold: 0.2 });
      document.querySelectorAll('[data-fly-away]').forEach(function (el) {
        if (el._fyw) return;
        el._fyw = { n: 0 };
        if (!reduced()) io.observe(el);
      });
    }

    if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', init);
    else init();
  })();
</script>

<div class="card" data-fly-away>Boarding pass sent</div>

<!-- or leaning left, harder: -->
<div class="card" data-fly-away data-tilt="-24">Boarding pass sent</div>