@mui/material/legacy/internal/animate.js

function easeInOutSin(time) {
  return (1 + Math.sin(Math.PI * time - Math.PI / 2)) / 2;
}

export default function animate(property, element, to) {
  var options = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {};
  var cb = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : function () {};
  var _options$ease = options.ease,
      ease = _options$ease === void 0 ? easeInOutSin : _options$ease,
      _options$duration = options.duration,
      duration = _options$duration === void 0 ? 300 : _options$duration;
  var start = null;
  var from = element[property];
  var cancelled = false;

  var cancel = function cancel() {
    cancelled = true;
  };

  var step = function step(timestamp) {
    if (cancelled) {
      cb(new Error('Animation cancelled'));
      return;
    }

    if (start === null) {
      start = timestamp;
    }

    var time = Math.min(1, (timestamp - start) / duration);
    element[property] = ease(time) * (to - from) + from;

    if (time >= 1) {
      requestAnimationFrame(function () {
        cb(null);
      });
      return;
    }

    requestAnimationFrame(step);
  };

  if (from === to) {
    cb(new Error('Element already at target position'));
    return cancel;
  }

  requestAnimationFrame(step);
  return cancel;
}