Main Components of the LWC Bundle

Detailed Explanation of Each Bundle File

1. HTML File (.html)

This file defines the visual part of the component using standard HTML and template syntax. You can include loops, conditions, data binding, and event handlers.

 Example: <template>     <h1>Hello {name}!</h1> </template> 

2. JavaScript File (.js)

The JavaScript file controls the component’s logic. It handles user actions, data fetching, wire adapters, event dispatching, and computations.

 import { LightningElement, track } from 'lwc'; export default

 class HelloWorld extends LightningElement {     name = 'Peoplewoo Skills'; } 

3. Meta XML File (.js-meta.xml)

The meta configuration file defines where the component can be used and whether it is exposed to Lightning App Builder.

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

  <apiVersion>60.0</apiVersion>     <isExposed>true</isExposed> 

    <targets>         <target>lightning__RecordPage</target>     

    <target>lightning__AppPage</target>   

  </targets> </LightningComponentBundle> 

4. CSS File (.css)

Used to style your component. LWC offers component-level style isolation.

 .example {     color: blue; } 

5. SVG Icon (.svg)

This file represents the component’s icon in App Builder or Experience Cloud.

6. Documentation File (.md)

Provides notes, instructions, and helpful tips for developers. Not required, but useful for teams.

7. Jest Test File (.test.js)

Contains unit test scripts written using Jest. Helps ensure your component works as expected.

Real-Life Example: How the LWC Bundle Works in a Project

Imagine you’re building a component that displays a list of Salesforce Contacts based on user selection. The HTML handles UI, the JS fetches Contact records via Apex, CSS styles the list, and the Meta file makes the component available on the Lightning Home Page. Together, these files create a complete and deployable LWC.

Why LWC Bundle Structure Matters

• Improves code organization
• Allows modular development
• Enhances reusability
• Makes deployment and testing easier