on scroll load 100 after 100 in dropdown javascript 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

<?php

$host = "localhost"; /* Host name */
$user = "root"; /* User */
$password = ""; /* Password */
$dbname = "tutorial"; /* Database name */

$con = mysqli_connect($host, $user, $password,$dbname);

// Check connection
if (!$con) {
  die("Connection failed: " . mysqli_connect_error());
}