Progress Stepper

<!-- Progress Stepper · NedDev · eigen werk. -->
<div class="jouw-container">
<div class="pst"><div class="pst-line"><span class="pst-fill"></span></div><div class="pst-steps"><div class="pst-step is-done"><span class="pst-dot">&checkmark;</span><span class="pst-txt">Account</span></div><div class="pst-step is-done"><span class="pst-dot">&checkmark;</span><span class="pst-txt">Profiel</span></div><div class="pst-step is-on"><span class="pst-dot">3</span><span class="pst-txt">Betaling</span></div><div class="pst-step"><span class="pst-dot">4</span><span class="pst-txt">Klaar</span></div></div></div>
</div>

/* Progress Stepper · NedDev · eigen werk. */
.pst{position:relative;width:360px;font-family:'Switzer',sans-serif;padding:8px 18px}
.pst-line{position:absolute;top:26px;left:38px;right:38px;height:3px;background:rgba(10,10,10,.12);border-radius:9px}
.pst-fill{position:absolute;left:0;top:0;height:100%;width:0;background:#F5480F;border-radius:9px;transition:width 1s cubic-bezier(.6,.05,.1,1)}
.pst-steps{position:relative;display:flex;justify-content:space-between}
.pst-step{display:flex;flex-direction:column;align-items:center;gap:8px}
.pst-dot{width:32px;height:32px;display:grid;place-items:center;border-radius:50%;background:#fff;border:2px solid rgba(10,10,10,.18);font-size:13px;font-weight:700;color:rgba(10,10,10,.5);transition:.3s}
.pst-step.is-done .pst-dot{background:#0a0a0a;border-color:#0a0a0a;color:#fff}
.pst-step.is-on .pst-dot{border-color:#F5480F;color:#F5480F;box-shadow:0 0 0 4px rgba(245,72,15,.15)}
.pst-txt{font-size:11px;font-weight:600;color:rgba(10,10,10,.6)}

// Progress Stepper · NedDev · eigen werk.
// root = het element waarin de HTML staat
function init(root){
root=root.querySelector('.pst')||root;var fill=root.querySelector('.pst-fill'),steps=[].slice.call(root.querySelectorAll('.pst-step'));var onIdx=steps.findIndex(function(s){return s.classList.contains('is-on');});var pct=(onIdx/(steps.length-1))*100;var io=new IntersectionObserver(function(es){es.forEach(function(en){if(en.isIntersecting){fill.style.width=pct+'%';io.disconnect();}});},{threshold:.4});io.observe(root);
}
init(document.querySelector('.jouw-container'));