Ripple Click Spark

<button type="button" class="nuda-cur2-ripple-spark">
  <span class="nuda-cur2-ripple-spark__label">Click me</span>
</button>

/* Ripple Click Spark — spawns a fading ring at the click point. */
(function () {
  document.querySelectorAll('.nuda-cur2-ripple-spark').forEach(function (btn) {
    btn.addEventListener('click', function (e) {
      var rect = btn.getBoundingClientRect();
      var ring = document.createElement('span');
      ring.className = 'nuda-cur2-ripple-spark__ring';
      ring.style.left = (e.clientX - rect.left) + 'px';
      ring.style.top = (e.clientY - rect.top) + 'px';
      btn.appendChild(ring);
      ring.addEventListener('animationend', function () {
        ring.remove();
      });
    });
  });
})();

.nuda-cur2-ripple-spark {
  position: relative;
  overflow: hidden;
  min-width: 120px;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 10px;
  border: 1px solid rgba(228,255,84,.3);
  background: #161616;
  color: #fafafa;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  isolation: isolate;
}

.nuda-cur2-ripple-spark__label {
  position: relative;
  z-index: 1;
}

.nuda-cur2-ripple-spark__ring {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: radial-gradient(circle,rgba(228,255,84,.9),rgba(228,255,84,0) 70%);
  transform: translate(-50%,-50%) scale(1);
  pointer-events: none;
  animation: _nuda-cur2ripplespark .6s ease-out forwards;
}

@keyframes _nuda-cur2ripplespark {
  to {
    transform: translate(-50%,-50%) scale(14);
    opacity: 0;
  }
}

.nuda-cur2-ripple-spark:focus-visible {
  outline: 2px solid #e4ff54;
  outline-offset: 3px;
}

@media (prefers-reduced-motion:reduce) {
  .nuda-cur2-ripple-spark__ring {
    animation: none;
    display: none;
  }
}