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Apex Class ========== public  class ContactController {     @AuraEnabled(cacheable=true)     public  static List<WrapperClass> displayConRecords()     {         List<WrapperClass> wrapperConList=new List<WrapperClass>();         for(Contact con:[select Id,LastName,Email,Phone from Contact LIMIT 10])         {             WrapperClass wrap=new WrapperClass();             wrap.LastName=con.LastName;             wrap.Email=con.Email;             wrap.Phone=con.Phone;             wrapperConList.add(wrap);         }         return wrapperConList;     }     public class WrapperClass     {         @AuraEnabled         public String LastName;         @AuraEnabled         public String Email;         @AuraEnabled         public String Phone;     }   } displayContacts.html ==================== <template>     <table class="slds-table slds-table_cell-buffer slds-table_header-hidden">         <tr>             &l

video link ======= https://www.youtube.com/watch?v=Hh3nEIk9sws&t=227s childComponent.html =================== <template>     <lightning-input type="text"  style="width:15%;" label="FirstName" placeholder="Enter the FirstName"  onchange={handleChangeFirstName}>     </lightning-input> </template> childComponent.js ================= import { LightningElement,api } from 'lwc'; export default class ChildComponent extends LightningElement {     @api firstname;     handleChangeFirstName(event){         this.firstname=event.target.value;         const sampleEvent=new CustomEvent('inputcarryevent',{             detail:this.firstname         });         this.dispatchEvent(sampleEvent);     } } parentComponent.html ==================== <template>     <c-child-component oninputcarryevent={handlechange}>     </c-child-component>     FirstName is:{firstname}

Apex class ========== public class AccountSearchController {     @AuraEnabled(cacheable=true)     public static List<Account> displayAccountRecords(String searchKey)     {         System.debug('searchKey'+searchKey);         List<Account> returnlist=new List<Account>();         for(Account acc:[select Name,Industry from Account where Industry=:searchKey])         {             returnlist.add(acc);         }         return returnlist;     } } childComponent.html =================== <template>     <template if:true={IndustryPicklistValues.data}>         <lightning-combobox name="progress"            label="Industry"            value={value}            placeholder="-Select-"            options={IndustryPicklistValues.data.values}            onchange={handleChange} >         </lightning-combobox>        </template> </template> childComponent.js ================

Video link ========= https://youtu.be/W9-ANZgxXZI Apex Class ========== public with sharing class AccountDemoController {     public AccountDemoController() {     }     @AuraEnabled(cacheable=true)     public static List<Account> displayAcntRecords(){         List<Account> acclist=[select Id,Name from Account LIMIT 5];         return acclist;     }     @AuraEnabled(cacheable=true)     public static List<Contact> displayConRecords(String accId){         System.debug('@@AccountId@@'+accId);         List<Contact> conlist=[select Id,LastName,AccountId from Contact where AccountId=:accId];         return conlist;     } } childComp2.html =============== <template> <b>Accounts</b>     <table class="slds-table slds-table_cell-buffer slds-table_bordered slds-m-top_small">         <tr>             <th>Select</th>             <th>AccountName</th>         </tr>

Video link ======== https://www.youtube.com/watch?v=7rXycIcjHPM&t=71s Apex Class ========== public with sharing class AccountCls {     @AuraEnabled(cacheable=true)     public static List<Account> displayAccounts() {         List<Account> acclist=[select Id,Name from Account LIMIT 10];         return acclist; } } deleteAccountsData.html ======================= <template>     <template if:true={accounts}>         <table class="slds-table slds-table_cell-buffer slds-table_header-hidden"> <thead class="slds-assistive-text"> <tr class="slds-line-height_reset">   <th class="" scope="col"> <div class="slds-truncate" title="Account Name">Account Name</div>   </th>   <th class="" scope="col"> <div class="slds-truncate" title="Action">Actio

AccountSearchController ======================= public class AccountSearchController {     @AuraEnabled(cacheable=true)     public static List<Account> displayAccountRecords(String searchKey)     {         System.debug('searchKey'+searchKey);         List<Account> returnlist=new List<Account>();         for(Account acc:[select Name,Industry from Account where Industry=:searchKey])         {             returnlist.add(acc);         }         return returnlist;     } } displayAccounts.html ==================== <template> <template if:true={IndustryPicklistValues.data}> <lightning-combobox name="progress"   label="Industry"   value={value}   placeholder="-Select-"   options={IndustryPicklistValues.data.values}   onchange={handleChange} > </lightning-combobox> </template><br/><br/> <template if:true={records}> <table>

Video link ========= https://www.youtube.com/watch?v=IkKFPHy29FU&t=16s Apex Class ========== public with sharing class AccountController {     @AuraEnabled(cacheable=true)     public  static List<Account> getAccounts()     {         List<Account> acclist=[select Id,Name from  Account LIMIT 5];         return acclist;     }     @AuraEnabled(cacheable=true)     public static List<Contact> getAllContacts(String searchKey)     {         System.debug('Entered into contact method');             List<Contact> returnconlist=new List<Contact>();         for(Contact con:[select LastName,Account.Name from Contact where Account.Name=:searchKey])         {             returnconlist.add(con);             System.debug('Contact list size'+returnconlist);         }         if(returnconlist.isEmpty())         {             System.debug('No Records found'+returnconlist.size());         }         return returnconl

Video link ======== https://www.youtube.com/watch?v=i2_Zgw5OI_A&t=14s Apex class ========== public with sharing class ContactSearchController {     @AuraEnabled(cacheable=true)     public static List<Contact> getAllContacts(String searchKey)     {         List<Contact> returnconlist=new List<Contact>();         String searchWord='%'+searchKey+'%';         for(Contact con:[select LastName from Contact where LastName like:searchWord])         {             returnconlist.add(con); }         if(returnconlist.isEmpty())         {             System.debug('No Records found'+returnconlist.size());         }         return returnconlist;         } }      conSearch.html ============== <template>     <lightning-card title="ContactSearchFunctionality" icon-name="custom:custom63">         <lightning-input label="Enter LastName"  style="width:50%;" placeholde

Video link ======== https://www.youtube.com/watch?v=7VDPA8S7Uss&t=23s displayContacts.html ==================== <template>     <template for:each={contacts.data} for:item="con"> <p key={con.Id}> {con.LastName} </p> <lightning-button label="Click me" variant="brand" onclick={handleClick} value={con.Id}>         </lightning-button> </template> <template if:true={contacts.error}> Error in processing the data </template> </template> displayContacts.js ================== import { LightningElement,wire} from 'lwc'; import getAllContacts from '@salesforce/apex/ContactController.getAllContacts'; export default class DisplayContacts extends LightningElement {     @wire(getAllContacts) contacts;     handleClick(event)     {         const currentId=event.target.value;         alert('====CurrentRecordId is===='+currentId);    

Video link ======== https://www.youtube.com/watch?v=lnE2z9ZfMfc&t=80s displayContacts.html ==================== <template>     <template for:each={contacts.data} for:item="con"> <p key={con.Id}> {con.LastName} </p> </template> <template if:true={contacts.error}> Error in processing the data </template> </template> displayContacts.js ================== import { LightningElement,wire} from 'lwc'; import getAllContacts from '@salesforce/apex/ContactController.getAllContacts'; export default class DisplayContacts extends LightningElement { @wire(getAllContacts) contacts; } Apex class ========== public with sharing class ContactController {     @AuraEnabled(cacheable=true)     public  static List<Contact> getAllContacts()     {         List<Contact> conlist=[select LastName,Email,Phone from Contact LIMIT 5];         return conlist;     } }

formFunctionality.html ====================== <template>    <template if:true={booleanvar}> <lightning-button label="cancel" onclick={handleCancel}> </lightning-button><br/>     <lightning-input label="FirstName" placeholder="Enter FirstName"> </lightning-input> <lightning-input label="LastName" placeholder="Enter LastName"> </lightning-input> <lightning-input label="Email" placeholder="Enter Email"> </lightning-input> <lightning-input label="Mobile" placeholder="Enter Mobile"> </lightning-input>     </template>    <template if:false={booleanvar}> <lightning-button label="ShowForm" variant="brand" onclick={handleClick}> </lightning-button>     </template> </template> formFunctionality.js ==================== import {

sampleStyling.html ================== <template>     <div align="center">   <h1 class="FirstName">BrahmaNaidu</h1>   <h1 class="LastName">Mandalapu</h1> <div class="demo"> sfdcscenarios.blogspot.com </div> </div> </template> sampleStyling.css ================= .FirstName {     color:red; } .LastName {     color:blue; } .demo {     color:yellowgreen; }

buttonFunctionality.html ======================== <template>     <lightning-button-group> <lightning-button label="Refresh" onclick={handleClick}> </lightning-button> <lightning-button label="Edit" onclick={handleClick}> </lightning-button> <lightning-button label="Save" onclick={handleClick}> </lightning-button> </lightning-button-group> </template> buttonFunctionality.js ====================== import { LightningElement,track } from 'lwc'; export default class buttonFunctionality extends LightningElement {     handleClick(event)     {         const buttonalabel=event.target.label;         alert(buttonalabel);     } } LighntingApplication ==================== <aura:application extends="force:slds">     <c:buttonFunctionality/> </aura:application>

simplecalculator.html ====================== <template>     <lightning-input label="Number1" name="number1" onchange={handleEvent}>     </lightning-input>     <lightning-input label="Number2" name="number2" onchange={handleEvent}>     </lightning-input>     <br/>     <lightning-button label="Add" variant="brand"  onclick={doAdd}>     </lightning-button>&nbsp;     <lightning-button label="Sub" variant="brand"  onclick={doSub}>     </lightning-button>&nbsp;     <lightning-button label="mul" variant="brand"  onclick={doMul}>     </lightning-button>&nbsp;     <lightning-button label="div" variant="brand"  onclick={doDiv}>     </lightning-button> </template> simplecalculator.js =================== import { LightningElement,track } from 'lwc';

Apex class ========== public class AccountController {   @AuraEnabled     public static List<Contact> displaycons(Id accountId)     {         List<Contact> conlist=[SELECT LastName FROM Contact WHERE AccountId = :accountId];         System.debug('===Conlist size==='+conlist.size());         return conlist;     }     @AuraEnabled     public static List<Opportunity> displayOpptys(Id accId)     {         List<Opportunity> opplist=[select Name from Opportunity where AccountId=:accId];         System.debug('===Opportunity list size==='+opplist.size());         return opplist;     } } SpinnerComponent.cmp ==================== <aura:component implements="force:lightningQuickActionWithoutHeader,force:hasRecordId"                 controller="AccountController" >     <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>   <div class="slds-form--stacked

Apex class ========== public class ContactCTRL4 {    @AuraEnabled    public static List<Contact> displayConRecords()    {        return [select LastName,Email from Contact LIMIT 10];    }     @AuraEnabled     public static list<Contact> updateConRecords(List<Contact> condata)     {         try         {             update condata;         }         catch(Exception e)         {             System.debug('unable to update the record due to '+e.getMessage());         }         return condata;     } } compoment ========= <aura:component  controller="ContactCTRL4">     <aura:attribute name="conlist" type="list"/>     <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>     <aura:attribute name="isEdit" type="boolean"/>     <aura:if isTrue="{!!v.isEdit}">         <lightning:button label="Ed

Apex class ========== public class AccountController {     @AuraEnabled     public static List<Account> displayAccRecords()     {         return [select Id,Name from Account LIMIT 5];     }     @AuraEnabled     public static List<Contact> displayConRecords(String accId)     {         List<Contact> returnconlist=new List<Contact>();         for(Contact con:[select Id,AccountId,FirstName, LastName from Contact where AccountId=:accId])         {             if(con!=null)             {                 returnconlist.add(con);             }         }         return returnconlist;     } } Accountcomponent.cmp ==================== <aura:component implements="force:appHostable, forceCommunity: availableForAllPageTypes" access="global" controller="AccountController" >     <aura:attribute name="accData" type="list"/>     <aura:attribute name="conData" type="list