Word Slide-up

Whole words rise from behind an invisible mask, one after another, shooting up fast and gliding to a stop. Loop it and they carry on up and out before the next rise.

Every word on cue

How to use it

Paste the snippet just before </head>.
Add data-word-slide-up to any heading or text element.

Options

Add any of these attributes to the same element.

`data-loop`	Rise in, hold, slide on up and out, and rise again.
`data-hold`	How long the text stays before leaving, when looping. Default 1800 ms.
`data-duration`	How long each word takes to rise. Default 1100 ms.
`data-stagger`	Gap between words. Default 90 ms.
`data-delay`	Wait before the first word. Default 0 ms.

1 · Snippet

<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/bundles/anime.umd.min.js"></script>
<script>
  (function () {
    // Word Slide-up: whole words rise from behind an invisible mask, one after
    // another, fast at first and gliding to a stop.
    // Usage: <h1 data-word-slide-up>Every word on cue</h1>
    // Optional: data-loop (words slide on up and out, then rise again),
    // data-hold (ms to stay before leaving), data-duration (ms per word),
    // data-stagger (ms between words), data-delay (ms before starting).
    var DEFAULTS = { duration: 1100, stagger: 90, delay: 0, hold: 1800 };

    var css =
      // The mask: each word clips its own inner span, with room for descenders.
      '.wsu-mask{display:inline-block;white-space:nowrap;clip-path:inset(-0.05em -0.15em -0.2em -0.15em)}' +
      '.wsu-word{display:inline-block;will-change:transform}';
    var style = document.createElement('style');
    style.textContent = css;
    document.head.appendChild(style);

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

    function split(el) {
      var text = el.textContent.replace(/\s+/g, ' ').trim();
      el.setAttribute('aria-label', text);
      el.textContent = '';
      return text.split(' ').map(function (word, i) {
        if (i) el.appendChild(document.createTextNode(' '));
        var mask = document.createElement('span');
        mask.className = 'wsu-mask';
        mask.setAttribute('aria-hidden', 'true');
        var w = document.createElement('span');
        w.className = 'wsu-word';
        w.textContent = word;
        mask.appendChild(w);
        el.appendChild(mask);
        return w;
      });
    }

    function play(el, words) {
      var d = el.dataset;
      var loop = d.loop !== undefined && d.loop !== 'false';
      var duration = +d.duration || DEFAULTS.duration;
      var stagger = +d.stagger || DEFAULTS.stagger;

      var tl = anime.createTimeline({ loop: loop, loopDelay: 200, delay: +d.delay || DEFAULTS.delay });
      tl.add(words, {
        y: ['130%', '0%'],
        duration: duration,
        ease: 'outExpo',
        delay: anime.stagger(stagger)
      });
      if (loop) {
        // Carry on upwards, so the next rise reads as a fresh line.
        tl.add(words, {
          y: ['0%', '-130%'],
          duration: duration * 0.55,
          ease: 'inQuart',
          delay: anime.stagger(stagger * 0.6)
        }, '+=' + (+d.hold || DEFAULTS.hold));
      }
    }

    function init() {
      var io = new IntersectionObserver(function (entries) {
        entries.forEach(function (e) {
          if (!e.isIntersecting) return;
          io.unobserve(e.target);
          play(e.target, e.target._wsuWords);
        });
      }, { threshold: 0.2 });
      document.querySelectorAll('[data-word-slide-up]').forEach(function (el) {
        if (el._wsuWords) return;
        var words = split(el);
        el._wsuWords = words;
        if (reduced()) return;
        words.forEach(function (w) { w.style.transform = 'translateY(130%)'; });
        io.observe(el);
      });
    }

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

2 · Your HTML

<h1 data-word-slide-up>Every word on cue</h1>

<!-- or, looping: -->
<h1 data-word-slide-up data-loop>Every word on cue</h1>