how to fetch data while scroll code example

Example 1: ajax call to load a page on scrolling

$(document).ready(function(){
 
 $(window).scroll(function(){
 
  var position = $(window).scrollTop();
  var bottom = $(document).height() - $(window).height();

  if( position == bottom ){

   var row = Number($('#row').val());
   var allcount = Number($('#all').val());
   var rowperpage = 3;
   row = row + rowperpage;

   if(row <= allcount){
    $('#row').val(row);
    $.ajax({
     url: 'fetch_details.php',
     type: 'post',
     data: {row:row},
     success: function(response){
      $(".post:last").after(response).show().fadeIn("slow");
     }
    });
   }
  }

 });
 
});

Example 2: ajax call to load a page on scrolling

.container{
 width: 55%;
 margin: 0 auto;
 border: 0px solid black;
 padding: 10px 0px;
}

/* post */
.post{
 width: 97%;
 min-height: 200px;
 padding: 5px;
 border: 1px solid gray;
 margin-bottom: 15px;
}

.post h1{
 letter-spacing: 1px;
 font-weight: normal;
 font-family: sans-serif;
}


.post p{
 letter-spacing: 1px;
 text-overflow: ellipsis;
 line-height: 25px;
}

/* more link */
.more{
 color: blue;
 text-decoration: none;
 letter-spacing: 1px;
 font-size: 16px;
}