you can use the animate method of zepto to implement the animation, and you can listen to execute the callback function when the animation is completed
animate (properties, {duration: msec, easing: type, complete: fn})
if you want to execute the callback function during the element change, use setTimeout to implement

zepto is to add transition transition of css3 or animation animation of css3 to realize
, both of which can only monitor the end time of animation, not the motion process
if you want to obtain the real-time position of the element, you can use setInterval or setTimeout+ Recursive to achieve real-time monitoring.

;(function () {
    var timer = null;
    function listenMove() {
      var that = this;
      timer = setInterval(function () {
        that.trigger('elem_move');
      }, 0)
    }

    $.fn.myanimate = function (properties, duration, ease, callback, delay) {
      listenMove.call(this);
      return $(this).animate(properties, duration, ease, function () {
        clearInterval(timer);
        callback && callback.apply(this, arguments)
      }, delay)
    }
  })();
  
$(elem).myanimate({
  left: 1000
}, 5000);

$(elem).on("elem_move", function (e) {
  console.log(this)
});