INNER CODE UNIT · JavaScript

roll

LeyckerS/moondownloader · web/app.js:201

function roll(el, to, fmt) {
  const from = Number(el.dataset.v || 0);
  if (!isFinite(to)) return;
  if (Math.abs(to - from) < 1e-4) { el.textContent = fmt(to); return; }
  cancelAnimationFrame(el._raf);
  const t0 = performance.now();
  const dur = 340;
  const tick = (now) => {
    const k = Math.min(1, (now - t0) / dur);
    const eased = 1 - Math.pow(1 - k, 3);
    el.textContent = fmt(from + (to - from) * eased);
    if (k < 1) el._raf = requestAnimationFrame(tick);
    else { el.dataset.v = String(to); el.textContent = fmt(to); }
  };
  el.dataset.v = String(to);
  el._raf = requestAnimationFrame(tick);
}

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