How do you use template if:true and template if:false condition to display content in lightning web component – LWC | how to use if and else condition in lwc

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Hey guys, today in this post we are going to learn about How do you use template if:true and template if:false condition to display content in lightning web component – LWC.

Files we used in this post example

lwcIfElseCondition.html Lightning Web Component HTML Template HTML file for used to write HTML element for user interface.
lwcIfElseCondition.js Lightning Web Component JavaScript It is holding onclick functionality for display the content as conditionally.
lwcIfElseCondition.js-meta.xml XML Meta File It is used for where this lightning web component you want to exposed.
lwcApp.app Lightning Application File It is used for call the component and preview on browser..

Live Demo →

if and else condition in lwc -- w3web.net

 

You can download file directly from github by Click Here.

 
 

 

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Create Lightning Web Component HTML →

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

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

lwcIfElseCondition.html [Lightning Web Component HTML]

  1.   <template >
  2.     <lightning-card title="How does works If & Else Condition in Lightning Web Component - LWC" custom-icon="custom:icon14">
  3.         <div  class="slds">
  4.             <template if:true={getShowContainer}>
  5.                 <div class="slds-grid slds-wrap">
  6.                     <div class="slds-col slds-size_3-of-12">					
  7.                         <img src="https://www.w3web.net/wp-content/uploads/2020/12/contactsBasedAccountNameFeature.jpg" width="100%" height="auto"></img>
  8.                     </div> 
  9.                     <div class="slds-col slds-size_9-of-12">
  10.                         <p><b>How to display account related contacts based on account name using search input and click button in Salesforce lightning web component – LWC</b></p><br/>
  11.                     <p>Hey guys, today in this post we are going to learn about How to display account related contacts based on account name using search input and click button in Salesforce lightning web component – LWC. Files we used in this post example: displayContactsOnAccountName.html Lightning Web Component HTML It is Templae HTML file for used to write HTML …</p><br/>                                                                  
  12.                     <p><span class="readMore"><a href="https://www.w3web.net/display-account-related-contacts-lwc/" target="_blank" rel="noopener noreferrer">Read more...</a></span></p>
  13.                     <br/><br/>
  14.                     <lightning-button label="Hide Container Data" variant="brand" size="small" onclick={hideContainerData} icon-name="utility:chevronup" icon-position="right"></lightning-button>   
  15.                    </div>
  16.                 </div>
  17.  
  18.             </template>
  19.             <template if:false={getShowContainer}>
  20.                 <lightning-button label="Show Container Data" variant="brand" size="small" onclick={showContainerData} icon-name="utility:chevrondown" icon-position="right"></lightning-button>
  21.             </template>
  22.  
  23.          </div>
  24.  
  25. <br/><br/>
  26.    <!--Start RelatedTopics Section-->
  27. <div style="border:1px #ddd solid; padding:10px; background:#eee; margin:40px 0;">
  28.  
  29.             <p data-aura-rendered-by="435:0"><img src="https://www.w3web.net/wp-content/uploads/2021/05/thumbsUpLike.png" width="25" height="25" style="vertical-align:top; margin-right:10px;" data-aura-rendered-by="436:0"><strong data-aura-rendered-by="437:0"><span style="font-size:16px; font-style:italic; display:inline-block; margin-right:5px;">Don't forget to check out:-</span><a href="https://www.w3web.net/" target="_blank" rel="noopener noreferrer" style="text-decoration:none;" data-aura-rendered-by="440:0">An easy way to learn step-by-step online free Salesforce tutorial, To know more Click  <span style="color:#ff8000; font-size:18px;" data-aura-rendered-by="442:0">Here..</span></a></strong></p>
  30.  
  31.             <br/><br/>
  32.             <p data-aura-rendered-by="435:0"><img src="https://www.w3web.net/wp-content/uploads/2021/07/tickMarkIcon.png" width="25" height="25" style="vertical-align:top; margin-right:10px;" data-aura-rendered-by="436:0"><strong data-aura-rendered-by="437:0"><span style="font-size:17px; font-style:italic; display:inline-block; margin-right:5px; color:rgb(255 128 0);">You May Also Like →</span> </strong></p>
  33.             <div style="display:block; overflow:hidden;"> 
  34.                 <div style="width: 50%; float:left; display:inline-block">
  35.                     <ul style="list-style-type: square; font-size: 16px; margin: 0 0 0 54px; padding: 0;"> 
  36.                         <li><a href="https://www.w3web.net/lwc-get-set-lightning-checkbox-value/" target="_blank" rel="noopener noreferrer">How to get selected checkbox value in lwc</a></li>
  37.                         <li><a href="https://www.w3web.net/display-account-related-contacts-in-lwc/" target="_blank" rel="noopener noreferrer">how to display account related contacts based on AccountId in lwc</a></li>
  38.                         <li><a href="https://www.w3web.net/create-lightning-datatable-row-actions-in-lwc/" target="_blank" rel="noopener noreferrer">how to create lightning datatable row actions in lwc</a></li>
  39.                         <li><a href="https://www.w3web.net/if-and-else-condition-in-lwc/" target="_blank" rel="noopener noreferrer">how to use if and else condition in lwc</a></li>
  40.                         <li><a href="https://www.w3web.net/get-selected-radio-button-value-and-checked-default-in-lwc/" target="_blank" rel="noopener noreferrer">how to display selected radio button value in lwc</a></li>
  41.                     </ul>
  42.             </div>
  43.  
  44.             <div style="width: 50%; float:left; display:inline-block">
  45.                     <ul style="list-style-type: square; font-size: 16px; margin: 0 0 0 54px; padding: 0;"> 
  46.                         <li><a href="https://www.w3web.net/display-account-related-contacts-lwc/" target="_blank" rel="noopener noreferrer">display account related contacts based on account name in lwc</a></li>
  47.                         <li><a href="https://www.w3web.net/create-lightning-datatable-row-actions-in-lwc/" target="_blank" rel="noopener noreferrer">how to insert a record of account Using apex class in LWC</a></li>
  48.                         <li><a href="https://www.w3web.net/fetch-picklist-values-dynamic-in-lwc/" target="_blank" rel="noopener noreferrer">how to get picklist values dynamically in lwc</a></li>
  49.                         <li><a href="https://www.w3web.net/edit-save-and-remove-rows-dynamically-in-lightning-component/" target="_blank" rel="noopener noreferrer">how to edit/save row dynamically in lightning component</a></li>
  50.                         <li><a href="https://www.w3web.net/update-parent-object-from-child/" target="_blank" rel="noopener noreferrer">update parent field from child using apex trigger</a></li>
  51.                     </ul>
  52.                 </div>
  53.                <div style="clear:both;"></div> 
  54.                <br/>
  55.                 <div class="youtubeIcon">
  56.                     <a href="https://www.youtube.com/channel/UCW62gTen2zniILj9xE6LmOg" target="_blank" rel="noopener noreferrer"><img src="https://www.w3web.net/wp-content/uploads/2021/11/youtubeIcon.png" width="25" height="25" style="vertical-align:top; margin-right:10px;"/> <strong>TechW3web:-</strong> To know more, Use this <span style="color: #ff8000; font-weight: bold;">Link</span> </a>
  57.                 </div>
  58.     </div>
  59.  
  60. </div>
  61.  
  62.   <!--End RelatedTopics Section-->
  63.     </lightning-card>
  64. </template>

 

Create Lightning Web Component JavaScript →

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

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

lwcIfElseCondition.js [LWC JavaScript File]

  1.   import { api, LightningElement } from 'lwc';
  2.  
  3. export default class LwcIfElseCondition extends LightningElement {
  4.     @api getShowContainer = false;
  5.  
  6.     showContainerData(event){
  7.       this.getShowContainer = true;
  8.       window.console.log('getShowContainer # ' + this.getShowContainer);
  9.     }
  10.  
  11.     hideContainerData(event){
  12.         this.getShowContainer = false;
  13.       }
  14.  
  15. }

 

Create Lightning Web Component Meta XML →

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

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

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

  1.   <?xml version="1.0" encoding="UTF-8"?>
  2. <LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
  3.     <apiVersion>45.0</apiVersion>
  4.     <isExposed>true</isExposed>
  5.     <targets>
  6.         <target>lightning__AppPage</target>
  7.         <target>lightning__RecordPage</target>
  8.         <target>lightning__HomePage</target>
  9.         <target>lightning__Tab</target>
  10.       </targets>
  11. </LightningComponentBundle>

 

Create Lightning Application →

Step 4:- Create Lightning Application : lwcApp.app

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

lwcApp.app [Component Application File]

  1.   <aura:application extends="force:slds">
  2.   <c:lwcIfElseCondition/>
  3. </aura:application>

if and else condition in lwc -- w3web.net

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FAQ (Frequently Asked Questions)

How do you know if a condition is true in LWC?

To render HTML conditionally in LWC we have if:true|false directive like we used 'aura:if' in aura components. For conditional rendering we just need to add the if:true|false directive to a nested 'template' tag that encloses the conditional content.

What is if true in LWC?

template if:true in LWC is used for Conditional Rendering to display markup or DOM elements dynamically if true value is provided. template if:false works in the same way but with the false value.

How can you display components HTML conditionally?

To render HTML conditionally, add the if:true|false directive to a nested tag that encloses the conditional content. Tip Directives are special HTML attributes. The Lightning Web Components programming model has a few custom directives that let you manipulate the DOM using markup.

Related Topics | You May Also Like

 
  

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Hi, This is Vijay Kumar 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. [Read full bio] | | The Sitemap where you can find all published post on w3web.net

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