passing values from child component to parent component in lwc -- w3web.net

A small example of custom event & dispatch event where we define a custom event in child component and passing values from child component to parent component in — LWC | how to pass value from child to parent component in lwc

Hey guys, today in this post we are going to learn about How to define a custom event in child lightning web component and passing values from child component to parent component in — LWC

Files we used in this post example:-

lwcParent.html Lightning Web Component HTML Template HTML file for used to write HTML element for user interface.
lwcParent.js Lightning Web Component JavaScript It is holding child component and it’s value.
lwcParent.js-meta.xml XML Meta File It is used for where this lightning web component you want to exposed.
lwcChild.html Lightning Web Component HTML It is child HTML file and calling on lwcParent.html.
lwcChild.js Lightning Web Component JavaScript It is holding @api public property with handler change functionality and it’s calling into parent componet.
lwcChild.js-meta.xml XML Meta File It is used for where this lightning web component should be exposed.
eventApplwc.app Lightning Application It is used for call the parent component to preview on browser.

Live Demo

passing values from child component to parent component in lwc -- w3web.net

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Start lwcParent Component

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

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

lwcParent.html [Lightning Web Component HTML]

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

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

lwcParent.js [LWC JavaScript File]

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

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

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

Start lwcChild Component

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

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

lwcChild.html [Lightning Web Component HTML]

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

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

lwcChild.js [LWC JavaScript File]

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

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

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

Start Application Component

Step 7:- Create Lightning Application : eventApplwc.app

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

eventApplwc.app [Component Application File]

passing values from child component to parent component in lwc -- w3web.net

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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.

10 thoughts on “A small example of custom event & dispatch event where we define a custom event in child component and passing values from child component to parent component in — LWC | how to pass value from child to parent component in lwc”

  1. Hi. your post is so nice and I really loved reading your post.
    It was very well authored and easy to understand. Great Thanks for sharing awesome info. I really love to read your blog.

    Reply

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