Slide Out

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/bundles/anime.umd.min.js"></script>
<script>
  (function () {
    // Slide Out: the element speeds up and slides off screen towards any edge.
    // Usage: <div data-slide-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, "left", "top" or "bottom"; give
    // several, like "right bottom left", and each loop uses the next),
    // data-distance (px to travel, fading out, instead of leaving the screen),
    // data-duration (ms, default 700), data-delay (ms in view before it
    // leaves, default 1200), data-loop (fade back in, hold and slide out
    // again), data-hold (ms to stay between exits when looping, default 1400).
    // Script use: animacious.slideOut(el, done) slides any element out now,
    // using its data-* options, and calls done afterwards.
    var DEFAULTS = { to: 'right', duration: 700, 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 };
    }

    // Where to end: an x/y offset that puts the element just outside the box.
    function offset(el, to) {
      var d = +el.dataset.distance;
      var r = el.getBoundingClientRect();
      var c = clipBox(el);
      if (to === 'left') return { x: -(d || r.right - c.left + 8), y: 0 };
      if (to === 'top') return { x: 0, y: -(d || r.bottom - c.top + 8) };
      if (to === 'bottom') return { x: 0, y: d || c.bottom - r.top + 8 };
      return { x: d || c.right - r.left + 8, y: 0 };
    }

    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;
      }
      anime.utils.set(el, { x: 0, y: 0 });
      var o = offset(el, to);
      var props = {
        x: o.x,
        y: o.y,
        duration: t,
        ease: 'in(3)',
        onComplete: function () {
          if (done) done();
        }
      };
      // Fade only when it stops short of the edge.
      if (d.distance) props.opacity = { to: 0, delay: t * 0.3, duration: t * 0.7, ease: 'in(2)' };
      anime.animate(el, props);
    }

    function cycle(el) {
      var d = el.dataset;
      var s = el._slo;
      var tos = (d.to || DEFAULTS.to).split(/[\s,]+/);
      var loop = d.loop !== undefined && d.loop !== 'false';
      leave(el, tos[s.n++ % tos.length], function () {
        if (!loop) {
          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, 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.slideOut = 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._slo;
          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-slide-out]').forEach(function (el) {
        if (el._slo) return;
        el._slo = { n: 0 };
        if (!reduced()) io.observe(el);
      });
    }

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

<div class="toast" data-slide-out>Conversation archived</div>

<!-- or on demand, when a close button is clicked: -->
<script>
  button.addEventListener('click', function () {
    animacious.slideOut(toast, function () { toast.remove(); });
  });
</script>