JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
  html { height: 100% }
  body { height: 100%; margin: 0px; padding: 0px }
  #map_canvas { height: 100% }
</style>
<script type="text/javascript"src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
    
    function initialize() {
        var latlng = new google.maps.LatLng(-34.397, 150.644);
        var myOptions = {
          zoom: 8,
          center: latlng,
          mapTypeId: google.maps.MapTypeId.ROADMAP
        };
        var map = new google.maps.Map(document.getElementById("map_canvas"),
            myOptions);
        google.maps.event.addListener(map, 'zoom_changed', function() {
            if(!$(window).data('now_marker_array'))return;
            $.each($(window).data('now_marker_array'),function(i,n){
                if(check_is_in_or_out(n.marker_)){
                    n.marker_.setVisible(true);
                }
                else{
                    n.marker_.setVisible(false);
                }
            })
        });
        var i=0,bounds_array;
        google.maps.event.addListener(map,'bounds_changed', function (){
            var bounds_=map.getBounds();
            if(bounds_){
                var leftBottom=[bounds_.getSouthWest().lat(),bounds_.getSouthWest().lng()]
                var rightTop=[bounds_.getNorthEast().lat(),bounds_.getNorthEast().lng()]
                bounds_array=[leftBottom,rightTop];
            }
            if(!i){
                get_600(bounds_)
            }
            i=1;
        });
    
    
    function check_is_in_or_out(marker){
      return map.getBounds().contains(marker.getPosition());
    }

    function clear(MarkerArray){
        $.each(MarkerArray,function(i,n){
            n.marker_.setMap(null);
        })
    }
    function myMarker(lat,lng){
        var me = this;
        me.marker_ = me.marker(lat,lng);
    }
   ...