Light Speed Out

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/bundles/anime.umd.min.js"></script>
<script>
  (function () {
    // Light Speed Out: the element crouches back for a moment, then shoots
    // off the side at speed, leaning back as it goes and fading as it leaves.
    // Usage: <div data-light-speed-out>…</div>
    // It plays once the element has been in view for data-delay ms. It leaves
    // past the edge 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-to ("right", default, or "left"; give both, "right
    // left", and each loop uses the next), data-skew (degrees of lean at full
    // speed, default 30), data-distance (px to travel instead of leaving the
    // screen),
    // data-duration (ms, default 650), data-delay (ms in view before it
    // leaves, default 1200), data-loop (fade back in, hold and shoot off
    // again), data-hold (ms to stay between exits when looping, default 1400).
    // Script use: animacious.lightSpeedOut(el, done) plays it on any element now,
    // using its data-* options, and calls done afterwards.
    var DEFAULTS = { to: 'right', skew: 30, duration: 650, delay: 1200, hold: 1400 };

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

    // The box the element must leave to be "off screen".
    function clipBox(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();
      }
      return { left: 0, top: 0, right: window.innerWidth, bottom: window.innerHeight };
    }

    function leave(el, to, done) {
      var d = el.dataset;
      var t = +d.duration || DEFAULTS.duration;
      if (reduced()) {
        anime.utils.set(el, { opacity: 0 });
        if (done) done();
        return;
      }
      var skew = d.skew === undefined ? DEFAULTS.skew : +d.skew || 0;
      anime.utils.set(el, { x: 0, skewX: 0 });
      var r = el.getBoundingClientRect();
      var c = clipBox(el);
      // +1 when it leaves to the right, -1 to the left.
      var dir = to === 'left' ? -1 : 1;
      // A skewed box reaches further sideways, so allow for its lean.
      var lean = Math.tan(skew * Math.PI / 180) * r.height / 2;
      var dist = +d.distance || (dir > 0 ? c.right - r.left : r.right - c.left) + lean + 8;
      anime.animate(el, {
        // A short wind-up, then away, its top trailing behind.
        x: [
          { to: -dir * Math.min(14, r.width * 0.05), duration: t * 0.25, ease: 'out(2)' },
          { to: dir * dist, duration: t * 0.75, ease: 'in(3)' }
        ],
        skewX: [
          { to: -dir * skew * 0.25, duration: t * 0.25, ease: 'out(2)' },
          { to: dir * skew, duration: t * 0.45, ease: 'in(2)' }
        ],
        opacity: { to: 0, delay: t * 0.5, duration: t * 0.5, ease: 'in(2)' },
        onComplete: function () {
          if (done) done();
        }
      });
    }

    function cycle(el) {
      var d = el.dataset;
      var s = el._lso;
      var list = (d.to || DEFAULTS.to).split(/[\s,]+/);
      leave(el, list[s.n++ % list.length], 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, skewX: 0, 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.lightSpeedOut = function (el, done) {
      leave(el, (el.dataset.to || DEFAULTS.to).split(/[\s,]+/)[0], 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._lso;
          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-light-speed-out]').forEach(function (el) {
        if (el._lso) return;
        el._lso = { n: 0 };
        if (!reduced()) io.observe(el);
      });
    }

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

<div class="card" data-light-speed-out>Message sent</div>

<!-- or to the left, leaning harder: -->
<div class="card" data-light-speed-out data-to="left" data-skew="40">Message sent</div>