In LWC communication how to pass the multiple values from parent component to child component through component JavaScript Method in salesforce lightning web component | how to pass value from parent to child component in lwc

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Hey guys, today in this post we are going to learn about In LWC communication how to pass the multiple values from parent component to child component through component JavaScript Method in Salesforce lightning web component.

Files we used in this post example

parentCmpLwc.html	Lightning Web Component HTML	The Templae HTML file for used to write HTML element for user interface.
parentCmpLwc.js	Lightning Web Component JavaScript	It is holding click functionality and geting the input value from child component.
parentCmpLwc.js-meta.xml	XML Meta File	It is used for where this lightning web component you want to exposed.
childCmpLwc.html	Lightning Web Component HTML	It is child HTML file and calling on parentCmpLwc.html.
childCmpLwc.js	Lightning Web Component JavaScript	It is holding @api public property and passing the value into parent componet.
lwcApp.app	Lightning Application	It is used for call the component to preview on browser..

Don’t forget to check out:- How to Insert, Edit/Update record without apex class by help of the lightning data service using “lightning-record-form” in Lighting Web Component — LWC Click Here For More Information

Live Demo

Other related post that would you like to learn in LWC

Create Parent Component

Step 1:- Create Lightning Web Component : parentCmpLwc.html

SFDX:Lightning Web Component >> New >> parentCmpLwc.html

parentCmpLwc.html [Lightning Web Component HTML]

  <template>
    <lightning-card>
        
        <h3 slot="title">
            <lightning-icon icon-name="utility:connected_apps" size="small"></lightning-icon> Pass the multiple values from parent component to child component in LWC       
        </h3>           
         <div class="slds slds-p-horizontal--medium">
            <lightning-icon icon-name="utility:down" size="x-small"> </lightning-icon> <span style="color:#ff0000; display:inline-block; margin-left:5px;">Parent Component</span>    
            <div class="slds-grid slds-wrap">
                <div class="slds-col slds-size_6-of-12 slds-p-horizontal--medium slds-m-bottom--small"><lightning-input type="text" label="User Name" class="userName"></lightning-input></div>
                <div class="slds-col slds-size_6-of-12 slds-p-horizontal--medium slds-m-bottom--small"><lightning-input type="text" label="Email" class="userEmail"></lightning-input></div>
                <div class="slds-col slds-size_6-of-12 slds-p-horizontal--medium slds-m-bottom--small"><lightning-input type="text" label="Phone" class="userPhone"></lightning-input></div>
                <div class="slds-col slds-size_6-of-12 slds-p-horizontal--medium slds-m-bottom--small"><lightning-input type="text" label="Address" class="userAddress"></lightning-input></div>
                <div class="slds-col slds-size_12-of-12 slds-p-horizontal--medium slds-text-align--center" >
                    <lightning-button label="Action Method" variant="brand" size="small" onclick={handleAction}></lightning-button>
                </div>
            </div>

            <lightning-icon icon-name="utility:down" size="x-small"></lightning-icon> <span style="color:#ff0000; display:inline-block; margin-left:5px;">Child Component</span>    
             <c-child-cmp-lwc></c-child-cmp-lwc>
        </div>


<br/><br/>
    <p><img src="https://www.w3web.net/wp-content/uploads/2021/05/thumbsUpLike.png" width="25" height="25" style="vertical-align:top; margin-right:10px;"/> <strong> <span style="font-size:15px; font-style:italic; display:inline-block; margin-right:5px;">Don't forget to check out:-</span> <a href="https://www.w3web.net/" target="_blank" style="text-decoration:none;" rel="noopener noreferrer">An easy way to learn step-by-step online free tutorial, To know more Click  <span style="color:#ff8000; font-size:18px;">Here..</span></a></strong></p>

         </lightning-card>
</template>

<lightning-card>

<lightning-icon icon-name="utility:connected_apps" size="small"></lightning-icon> Pass the multiple values from parent component to child component in LWC

</h3>

<lightning-icon icon-name="utility:down" size="x-small"> </lightning-icon> <span style="color:#ff0000; display:inline-block; margin-left:5px;">Parent Component</span>

<lightning-button label="Action Method" variant="brand" size="small" onclick={handleAction}></lightning-button>

</div>

<lightning-icon icon-name="utility:down" size="x-small"></lightning-icon> <span style="color:#ff0000; display:inline-block; margin-left:5px;">Child Component</span>

<c-child-cmp-lwc></c-child-cmp-lwc>

</div>

<p><img src="https://www.w3web.net/wp-content/uploads/2021/05/thumbsUpLike.png" width="25" height="25" style="vertical-align:top; margin-right:10px;"/> <strong> <span style="font-size:15px; font-style:italic; display:inline-block; margin-right:5px;">Don't forget to check out:-</span> <a href="https://www.w3web.net/" target="_blank" style="text-decoration:none;" rel="noopener noreferrer">An easy way to learn step-by-step online free tutorial, To know more Click <span style="color:#ff8000; font-size:18px;">Here..</span></a></strong></p>

</lightning-card>

</template>

Step 2:- Create Lightning Web Component : parentCmpLwc.js

SFDX:Lightning Web Component >> New >> parentCmpLwc.js

parentCmpLwc.js [LWC JavaScript File]

  import { api, LightningElement } from 'lwc';


export default class ParentCmpLwc extends LightningElement {
    @api username;
    @api useremail;
    @api userphone;
    @api useraddress;

    handleAction(){
      this.username = this.template.querySelector('.userName').value;
      this.useremail= this.template.querySelector('.userEmail').value;
      this.userphone= this.template.querySelector('.userPhone').value;
      this.useraddress= this.template.querySelector('.userAddress').value;
      
      var fullValueStr = {
         getUserName:this.username,
         getUserEmail:this.useremail, 
         geUserPhone:this.userphone, 
         getUserAddress:this.useraddress
      };
      window.console.log(JSON.stringify('fullValueStr' + fullValueStr));
      this.template.querySelector("c-child-cmp-lwc").displayChildValueAction(fullValueStr);
     
      this.username = this.template.querySelector('.userName').value='';
      this.useremail= this.template.querySelector('.userEmail').value='';
      this.userphone= this.template.querySelector('.userPhone').value='';
      this.useraddress= this.template.querySelector('.userAddress').value='';

    }
}

import { api, LightningElement } from 'lwc';

export default class ParentCmpLwc extends LightningElement {

@api username;

@api useremail;

@api userphone;

@api useraddress;

handleAction(){

this.username = this.template.querySelector('.userName').value;

this.useremail= this.template.querySelector('.userEmail').value;

this.userphone= this.template.querySelector('.userPhone').value;

this.useraddress= this.template.querySelector('.userAddress').value;

var fullValueStr = {

getUserName:this.username,

getUserEmail:this.useremail,

geUserPhone:this.userphone,

getUserAddress:this.useraddress

};

window.console.log(JSON.stringify('fullValueStr' + fullValueStr));

this.template.querySelector("c-child-cmp-lwc").displayChildValueAction(fullValueStr);

this.username = this.template.querySelector('.userName').value='';

this.useremail= this.template.querySelector('.userEmail').value='';

this.userphone= this.template.querySelector('.userPhone').value='';

this.useraddress= this.template.querySelector('.userAddress').value='';

}

Step 3:- Create Lightning Web Component : parentCmpLwc.js-meta.xml

SFDX:Lightning Web Component >> New >> parentCmpLwc.js-meta.xml

parentCmpLwc.js-meta.xml [LWC Meta Data XML]

  <?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
    <apiVersion>45.0</apiVersion>
    <isExposed>true</isExposed>
    <targets>
        <target>lightning__AppPage</target>
        <target>lightning__RecordPage</target>
        <target>lightning__HomePage</target>
      </targets>
</LightningComponentBundle>

<?xml version="1.0" encoding="UTF-8"?>

<target>lightning__AppPage</target>

<target>lightning__RecordPage</target>

<target>lightning__HomePage</target>

</targets>

</LightningComponentBundle>

Create Child Component

Step 4:- Create Lightning Web Component : childCmpLwc.html

SFDX:Lightning Web Component >> New >> childCmpLwc.html

childCmpLwc.html [Lightning Web Component HTML]

  <template>
    <lightning-card>    
        <table class="slds-table slds-table_cell-buffer slds-table_bordered slds-table_col-bordered" border="1" cellspacing="0" cellpadding="0" bordercolor="#ccc" style="border-collapse:collapse;">
            <thead>
                <tr>
                    <th>User Name</th>
                    <th>Email</th>
                    <th>Phone</th>
                    <th>Address</th>                    
                </tr>
            </thead>
            <tbody>
                <tr>
                    <td>{userNameVal}</td>
                    <td>{userEmailVal}</td>
                    <td>{userPhoneVal}</td>
                    <td>{userAddressVal}</td>                   
                </tr>
            </tbody>
        </table>       
    </lightning-card>
</template>

<lightning-card>

<thead>

<tr>

<th>Email</th>

<th>Phone</th>

<th>Address</th>

</tr>

</thead>

<tbody>

<tr>

<td>{userNameVal}</td>

<td>{userEmailVal}</td>

<td>{userPhoneVal}</td>

<td>{userAddressVal}</td>

</tr>

</tbody>

</table>

</lightning-card>

</template>

Step 5:- Create Lightning Web Component : childCmpLwc.js

SFDX:Lightning Web Component >> New >> childCmpLwc.js

childCmpLwc.js [LWC JavaScript File]

  import { api, LightningElement } from 'lwc';

export default class ChildCmpLwc extends LightningElement {
    @api userNameVal;
    @api userEmailVal;
    @api userPhoneVal;
    @api userAddressVal;


    @api
    displayChildValueAction(namestr){
       this.userNameVal = namestr.getUserName;
       this.userEmailVal = namestr.getUserEmail;
       this.userPhoneVal = namestr.geUserPhone;
       this.userAddressVal = namestr.getUserAddress;
    }

}

import { api, LightningElement } from 'lwc';

export default class ChildCmpLwc extends LightningElement {

@api userNameVal;

@api userEmailVal;

@api userPhoneVal;

@api userAddressVal;

@api

displayChildValueAction(namestr){

this.userNameVal = namestr.getUserName;

this.userEmailVal = namestr.getUserEmail;

this.userPhoneVal = namestr.geUserPhone;

this.userAddressVal = namestr.getUserAddress;

}

Step 6:- Create Lightning Web Component : parentCmpLwc.js-meta.xml

SFDX:Lightning Web Component >> New >> parentCmpLwc.js-meta.xml

parentCmpLwc.js-meta.xml [LWC Meta Data XML]

  <?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
    <apiVersion>48.0</apiVersion>
    <isExposed>false</isExposed>
</LightningComponentBundle>

<?xml version="1.0" encoding="UTF-8"?>

<isExposed>false</isExposed>

</LightningComponentBundle>

Create Lightning Application

Step 7:- Create Lightning Application : slwcApp.app

From Developer Console >> File >> New >> Lightning Application

lwcApp.app [Component Application File]

  <aura:application extends="force:slds">
  <c:parentCmpLwc/>
</aura:application>

<aura:application extends="force:slds">

<c:parentCmpLwc/>

</aura:application>

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Author of w3web.net

Hi, This is Vijay behind the admin and founder of w3web.net. I am a senior software developer and working in MNC company from more than 8 years. I am great fan of technology, configuration, customization & development. Apart of this, I love to write about Blogging in spare time, Working on Mobile & Web application development, Salesforce lightning, Salesforce LWC and Salesforce Integration development in full time.

1 thought on “In LWC communication how to pass the multiple values from parent component to child component through component JavaScript Method in salesforce lightning web component | how to pass value from parent to child component in lwc”

Fiona Xu

August 9, 2021 at 6:30 am

Amazing article, and I have learned a lot

Files we used in this post example

Create Parent Component

parentCmpLwc.html [Lightning Web Component HTML]

parentCmpLwc.js [LWC JavaScript File]

parentCmpLwc.js-meta.xml [LWC Meta Data XML]

Create Child Component

childCmpLwc.html [Lightning Web Component HTML]

childCmpLwc.js [LWC JavaScript File]

parentCmpLwc.js-meta.xml [LWC Meta Data XML]

Create Lightning Application

lwcApp.app [Component Application File]

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Author of w3web.net

1 thought on “In LWC communication how to pass the multiple values from parent component to child component through component JavaScript Method in salesforce lightning web component | how to pass value from parent to child component in lwc”

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