Магнитная кнопка в Tilda
готовый код.

<style>
.js-magnetic-button {
  transition: transform .28s cubic-bezier(.2,.8,.2,1);
  will-change: transform;
}
@media (prefers-reduced-motion: reduce) {
  .js-magnetic-button { transition: none; }
}
</style>

<script>
(function () {
  if (!window.matchMedia('(pointer: fine) and (prefers-reduced-motion: no-preference)').matches) return;

  document.querySelectorAll('.js-magnetic-button').forEach(function (button) {
    button.addEventListener('mousemove', function (event) {
      var rect = button.getBoundingClientRect();
      var x = event.clientX - rect.left - rect.width / 2;
      var y = event.clientY - rect.top - rect.height / 2;
      button.style.transform = 'translate(' + x * 0.18 + 'px,' + y * 0.18 + 'px)';
    });
    button.addEventListener('mouseleave', function () {
      button.style.transform = 'translate(0,0)';
    });
  });
})();
</script>