sfdevmaster

//LazyLoadingAccountController.apex
public class LazyLoadingAccountController {
    @AuraEnabled
    public static List<Account> getAccountsData(Integer limitSize, Integer offset) {
        return [
            SELECT Id, Name, Industry 
            FROM Account 
            ORDER BY Name 
            LIMIT :limitSize 
            OFFSET :offset

sfdevmaster

/*serverSideLazyLoadingInDataTableWithLoadMoreButton.css*/
.container {
    padding: 0.5rem;
}
.account-list{
    border: 1px solid #d8dde6;
    background-color: #fff !important; 
}
.all-loaded {
    color: #28a745;

sfdevmaster

/*serverSideLazyLoadingInHtmlTableWithLoadMoreButton.css*/
.scrollable {
    overflow-y: auto;
    border: 1px solid #d8dde6;
    padding: 0.5rem;
}

.slds-table thead th {
    position: sticky;
    top: 0;

sfdevmaster

// LazyLoadingContactController.apex
public class LazyLoadingContactController {
    @AuraEnabled(cacheable=true)
    public static List<Contact> getContactsData(Integer limitSize, Integer offset) {
        return [
            SELECT Id, FirstName,LastName, Email
            FROM Contact WHERE Name Like 'E%'
            ORDER BY Name 
            LIMIT :limitSize 
            OFFSET :offset

sfdevmaster

/*serverSideLazyLoadingInHtmlTableWithScrollBar.css*/
.scrollable {
    overflow-y: auto;
    border: 1px solid #d8dde6;
    padding: 0.5rem;
}
.slds-table thead th {
    position: sticky;
    top: 0;
    background-color: rgba(238, 238, 238, 1);

sfdevmaster

<template>
    <!-- Main card to hold the content -->
    <lightning-card title="Mass Update Leads" icon-name="standard:lead">
        <!-- Conditionally render the form only if valid leads exist -->
        <template lwc:if={validLeadExists}>
            <div class="slds-p-around_medium">
                <!-- Iterate over the list of lead IDs and render forms for each -->
                <template for:each={leadIds} for:item="leadId">
                    <div class="slds-m-around_medium" key={leadId}>
                        <!-- Lightning record edit form for updating a lead record -->