Marquee gestuurd door scroll

Two large lines of text run in opposite directions; scrolling speeds them up and reverses direction when you scroll back. For an energetic section divider.

Webdesign · Webshops · Vindbaarheid · Onderhoud ·

Den Haag · Rotterdam · Leiden · Delft · Zoetermeer ·

scroll de pagina

How to use it

Paste the HTML where the scroll effects should appear.
Add the CSS to your stylesheet. All classes are prefixed, so nothing clashes with your own styles.
Add the JavaScript and call init() with the element that contains the HTML.

<!-- Marquee gestuurd door scroll · NedDev · eigen werk. -->
<div class="jouw-container">
<div class="ei-smq"><div class="ei-smq__row"><div class="ei-smq__tr">Webdesign · Webshops · Vindbaarheid · Onderhoud · </div></div><div class="ei-smq__row ei-smq__row--b"><div class="ei-smq__tr">Den Haag · Rotterdam · Leiden · Delft · Zoetermeer · </div></div><span class="ei-smq__k">scroll de pagina</span></div>
</div>

/* Marquee gestuurd door scroll · NedDev · eigen werk. */
.ei-smq{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;gap:10px;overflow:hidden;background:#f4f3f1}
.ei-smq__row{display:flex;white-space:nowrap;overflow:hidden}
.ei-smq__tr{flex:none;font-family:'Boldonse','Switzer',sans-serif;font-weight:400;font-size:clamp(26px,5vw,40px);line-height:1.5;color:#0a0a0a;padding-right:.3em;will-change:transform}
.ei-smq__row--b .ei-smq__tr{color:transparent;-webkit-text-stroke:1.2px #F5480F}
.ei-smq__k{position:absolute;bottom:12px;left:16px;font-family:'JetBrains Mono',monospace;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:rgba(10,10,10,.45)}

// Marquee gestuurd door scroll · NedDev · eigen werk.
// root = het element waarin de HTML staat
function init(root){
var w=root.querySelector('.ei-smq'),rows=[].slice.call(w.querySelectorAll('.ei-smq__row'));
var reduce=matchMedia('(prefers-reduced-motion: reduce)').matches;
var lines=rows.map(function(r,i){var t=r.querySelector('.ei-smq__tr');for(var k=0;k<3;k++){var c=t.cloneNode(true);c.setAttribute('aria-hidden','true');r.appendChild(c);}return {row:r,dir:i?1:-1,x:0};});
var dirSign=1,boost=0,lastY=window.scrollY,visible=true;
if(window.IntersectionObserver)new IntersectionObserver(function(es){visible=es[0].isIntersecting;}).observe(w);
window.addEventListener('scroll',function(){var y=window.scrollY,dy=y-lastY;lastY=y;if(dy!==0)dirSign=dy>0?1:-1;boost=Math.min(28,boost+Math.abs(dy)*.25);},{passive:true});
function tick(){if(!w.isConnected)return;if(visible&&!reduce){var v=(.6+boost)*dirSign;boost*=.92;
  lines.forEach(function(l){var unit=l.row.firstElementChild.offsetWidth||1;l.x+=v*l.dir;if(l.x<=-unit)l.x+=unit;if(l.x>0)l.x-=unit;[].forEach.call(l.row.children,function(c){c.style.transform='translateX('+l.x.toFixed(2)+'px)';});});}
  requestAnimationFrame(tick);}
lines[1].x=-200;requestAnimationFrame(tick);
}
init(document.querySelector('.jouw-container'));

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