Remote Objects Infinite Scroll

ContactsController.cls

public with sharing class ContactsController {

    @RemoteAction
    public static Map<String, Object> retrieveContacts(String type, List<String> fields, Map<String, Object> criteria) {
        
        // Retrieve using the standard retrieve
        Map<String, Object> result = RemoteObjectController.retrieve(type, fields, criteria);
        
        // Add in the total record count for the current user. 
        // This is needed to know when to stop scrolling.
        Integer totalContacts = [
            SELECT Count() 
            FROM Contact 
            WHERE OwnerId =: UserInfo.getUserId()
        ];
        
        // Create a new map since the result map is read-only
        Map<String, Object> customResult = 
            new Map<String, Object> {'totalContacts'=> totalContacts};
        customResult.putAll(result);
        
        return customResult;
    }
}

infiniteScroll.page

<apex:page controller="ContactsController">

<apex:includeScript value="{!URLFOR($Resource.jquery, 'jquery-1.11.1.min.js')}"/>
 
<!-- css generated from http://tablestyler.com/ -->
<apex:stylesheet value="{!URLFOR($Resource.table, 'table.css')}"/>

<apex:remoteObjects >
    <apex:remoteObjectModel jsShortHand="con" name="Contact" fields="Id,Name,Email,Phone,MobilePhone,Image_URL__c" 
        retrieve="{!$RemoteAction.ContactsController.retrieveContacts}"/>
</apex:remoteObjects>
    
<script>
    var $j = jQuery.noConflict();
    var offsetVal = 0;
    var limitVal = 5;
    var totalContacts = limitVal;
    var rowCount = 1;
    
    var scrollListener = function() {
        $j(window).one("scroll", function() { 
            if ($j(window).scrollTop() >= $j(document).height() - $j(window).height() - 100) {
                if (offsetVal < totalContacts) {
                    loadRecords();
                }
            }
            setTimeout(scrollListener, 200);
        });
    };
    
    $j(document).ready(function() {
        loadRecords();
        scrollListener();
    });
    
    function loadRecords() {
        var criteria = {
            limit: limitVal,
            orderby: [ {Name: "ASC"} ],
        };
            
        // offsetVal must be at least 1
        if (offsetVal >= 1) {
            criteria.offset = offsetVal;
        }
            
        var con = new SObjectModel.con();
            
        con.retrieve(criteria, function(err, records, event) {
            if (err) {
                alert(err);
            } else {
                offsetVal += records.length;
                totalContacts = event.result.totalContacts;
                records.forEach(function(record) {
                    addTableRow(record);
                });
            }
        });
    }
    
    function addTableRow(record) {
        var cssClass = "";
        if ( (rowCount % 2) == 0 ) {
            cssClass = "alt";
        }
        
        $j("#contacts tbody:last").append(
            "<tr class='" + cssClass + "'>" + 
            "<td><img src='" + record.get("Image_URL__c") + "' /></td>" +
            "<td><a href='/" + record.get("Id") + "' target='_blank'>" + record.get("Name") + "</a></td>" +
            "<td>" + record.get("Email") + "</td>" + 
            "<td>" + record.get("MobilePhone") + "</td>" + 
            "<td>" + record.get("Phone") + "</td>" +
            "</tr>"
        );
        rowCount++;
    }
</script>
<div class="datagrid">
    <table id="contacts">
        <thead>
            <tr>
                <th>Image</th> <th>Name</th> <th>Email</th> <th>Home Phone</th> <th>Mobile Phone</th>
            </tr>
        </thead>
        <tbody> </tbody>
    </table>
</div>
</apex:page>

table.css

/* From http://tablestyler.com/ */
.datagrid table {
    border-collapse: collapse;
    text-align: left;
    width: 100%;
}

.datagrid {
    font: normal 12px/150% Arial, Helvetica, sans-serif;
    background: #fff;
    overflow: hidden;
    border: 1px solid #006699;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    border-radius: 3px;
}

.datagrid table td, .datagrid table th {
    padding: 3px 10px;
}

.datagrid table thead th {
    background: -webkit-gradient( linear, left top, left bottom, color-stop(0.05, #006699), color-stop(1, #00557F) );
    background: -moz-linear-gradient( center top, #006699 5%, #00557F 100% );
    filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#006699', endColorstr='#00557F');
    background-color: #006699;
    color: #FFFFFF;
    font-size: 15px;
    font-weight: bold;
    border-left: 1px solid #0070A8;
}

.datagrid table thead th:first-child {
    border: none;
}

.datagrid table tbody td {
    color: #00496B;
    border-left: 1px solid #E1EEF4;
    font-size: 12px;
    font-weight: normal;
}

.datagrid table tbody .alt td {
    background: #E1EEF4;
    color: #00496B;
}

.datagrid table tbody td:first-child {
    border-left: none;
}

.datagrid table tbody tr:last-child td {
    border-bottom: none;
}

.datagrid table tbody tr td:first-child {
    text-align: center;
}