Hey guys, today in this post we are going to learn about how to communicate between two custom component using application event.
Real time scenarios:- Create an event in Salesforce lightning, and Checked the Value of Checkbox from parent component to child component on click button in Lightning Component using Application event.
Files we used in this post example:-
| eventApp1.app | Lightning Application | It is used for call the component to preview on browser. |
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eventRegisterCmp1.cmp |
Lightning Component | It is a parent component and hold a click button. |
|
eventRegisterCmp1Controller.js |
JavaScript Controller File | It is used for click function for Checkbox Checked the Value. |
| eventHandlerCmp1.cmp | Lightning Component | It is a child component of eventRegisterCmp1.cmp, It is hold checkbox input. |
| eventHandlerCmp1Controller.js | JavaScript Controller File | It is fire automatically and get the value of event from parent component and set value of attribute. |
| repCheckboxEvent.evt | Lightning Event | Creat a application event, hold a boolean type attribute that default value is false. |
Live Demo
Other related post that would you like to learn in lightning component.
Step 1:- Create Lightning Application : eventApp1.app
From Developer Console >> File >> New >> Lightning Application
eventApp1.app [Component Application File]
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<aura:application extends="force:slds"> <c:eventRegisterCmp1/> </aura:application> |
Step 2:- Create Lightning Component : eventRegisterCmp1.cmp
From Developer Console >> File >> New >> Lightning Component
eventRegisterCmp1.cmp [Lightning Component File]
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<aura:component > <aura:registerEvent name="repCheck" type="c:repCheckboxEvent"/> <div class="slds slds-p-around--medium"> <button class="slds-button slds-button--brand" onclick="{!c.checkVal}"> checkValue </button> <br/><br/> <c:eventHandlerCmp1/> <br/> <br/> <!--Start RelatedTopics Section--> <div style="border:1px #ddd solid; padding:10px; background:#eee; margin:40px 0;"> <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> <br/><br/> <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> <div style="display:block; overflow:hidden;"> <div style="width: 50%; float:left; display:inline-block"> <ul style="list-style-type: square; font-size: 16px; margin: 0 0 0 54px; padding: 0;"> <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> <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> <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> <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> <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> </ul> </div> <div style="width: 50%; float:left; display:inline-block"> <ul style="list-style-type: square; font-size: 16px; margin: 0 0 0 54px; padding: 0;"> <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> <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> <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> <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> <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> </ul> </div> <div style="clear:both;"></div> <br/> <div class="youtubeIcon"> <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> </div> </div> </div> <!--End RelatedTopics Section--> </div> </aura:component> |
Step 3:- Create Lightning Component : eventRegisterCmp1Controller.js
From Developer Console >> File >> New >> Lightning Component >> JavaScript Controller
eventRegisterCmp1Controller.js [JavaScript Controller]
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({ checkVal : function(component, event, helper) { var repCheck = $A.get("e.c:repCheckboxEvent"); repCheck.setParams({ "selfCheckValue":true }); repCheck.fire(); } }) |
Step 4:- Create Lightning Component : eventHandlerCmp1.cmp
From Developer Console >> File >> New >> Lightning Component
eventHandlerCmp1.cmp [Lightning Component File]
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<aura:component> <aura:handler event="c:repCheckboxEvent" action="{!c.repCheckEnable}"/> <aura:attribute name="selfChildDeal" type="Boolean"/> <div class="slds slda-p-around--medium"> <div class="slds-form-element__control"> <label class="slds-checkbox"> <ui:inputCheckbox aura:id="repCheckId" value="{!v.selfChildDeal}" /> <span class="slds-checkbox--faux"></span> <span class="slds-form-element__label slds-m-left--x-small" style="font-size: 0.75rem;"> Self Representative </span> </label> </div> <br/> </div> </aura:component> |
Step 5:- Create Lightning Component : eventHandlerCmp1Controller.js
From Developer Console >> File >> New >> Lightning Component >> JavaScript Controller
eventHandlerCmp1Controller.js [JavaScript Controller]
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({ repCheckEnable : function(component, event, helper) { var selfCheckValue1 = event.getParam("selfCheckValue"); component.set("v.selfChildDeal", selfCheckValue1); //alert('selfCheckValue ' + selfCheckValue); } }) |
Step 6:- Lightning Event : repCheckboxEvent.evt
From Developer Console >> File >> New >> Lightning Event
repCheckboxEvent.evt [Lightning Component File]
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<aura:event type="Application" description="Event template" access="global"> <aura:attribute name="selfCheckValue" type="Boolean" default="false"/> </aura:event> |
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