LightningStudio is a developer-friendly workspace (Cloud IDE or local Studio plugin). Typical steps:

1. Create a new LWC component (right-click → New → Lightning Web Component)
2. Edit .html, .js, and .css files
3. Configure .js-meta.xml for target (record page / app / home)
4. Deploy to scratch org / sandbox or preview locally (if supported)
5. Test interactions and attributes

Note: The exact UI of LightningStudio may vary. This guide focuses on LWC concepts that are the same across editors.

Component File Structure (Example)

When you create myCard component, LightningStudio generates:

 myCard/   myCard.html        <-- template (markup)   myCard.js     

     <-- component logic   myCard.css         <-- component styles (optional)  

 myCard.js-meta.xml <-- metadata (where component can be used)   

myCard.html (template)

 <template>   <div>     <h2>{title}</h2>     <slot></slot>   </div> </template> 

myCard.js (JavaScript)

 import { LightningElement, api } from 'lwc'; 

export default class MyCard extends LightningElement 

{   @api title = 'Default Title'; // public attribute }   

myCard.js-meta.xml (metadata)

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

 <LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">

   <apiVersion>57.0</apiVersion>   <isExposed>true</isExposed>   <targets>  

   <target>lightning__AppPage</target>     <target>lightning__RecordPage</target> 

  </targets> </LightningComponentBundle>   

What Are Attributes in LWC?

In LWC, attributes typically mean HTML-like attributes used to pass values to components. On the JavaScript side these map to public properties decorated with @api.

Key points:

• @api marks a property as public — it can be set by a parent component.
• Public properties are reactive — when changed by the parent, the child re-renders.
• Attributes passed in markup are converted to strings by HTML — LWC converts or parses where appropriate.
• Boolean attributes and absence/presence nuances exist (see examples below).

Passing Data: Parent → Child

Parent components set child attributes in the child tag. Example:

childComponent.js

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

class ChildComponent extends LightningElement {   @api recordId; 

// public string   @api showHeader = true; // public boolean (default true) }  

parentComponent.html

 <template>   <c-child-component record-id={currentRecordId} 

show-header={showHeader}></c-child-component> </template>   

Important: Attribute names in markup use kebab-case (dash-case) while JS properties use camelCase. The framework maps record-id → recordId, show-header → showHeader.

Child → Parent Communication (Events)

Attributes are one-way (parent → child). To send data up, child components dispatch events:

 // child.js this.dispatchEvent(new CustomEvent('saved', { detail:

 { id: this.recordId } })); // parent.html <c-child-component></c-child-component>

 // parent.js handleSaved(event) {   const id = event.detail.id; }   

Detailed Examples: Attribute Types & Behavior

1) String attribute

 // child.js import { LightningElement, api } from 'lwc'; export 

default class Greeting extends LightningElement {   @api name = 'Guest'; }   

 <!-- parent.html --> <c-greeting name="Amit"></c-greeting> 

<!-- OR using JS property binding --> <c-greeting name="{userName}"></c-greeting>

2) Boolean attribute

HTML attributes are strings. To pass boolean true/false reliably, bind to JS boolean or use presence rules.

 <!-- parent.html --> <c-child show-header={isHeaderVisible}></c-child>   

 // parent.js isHeaderVisible = true; // boolean   

3) Object / Array

Pass via property binding (not static attributes):

 <c-child items="{itemsList}"></c-child>   

 // parent.js itemsList = [{id:1, name:'A'}, {id:2, name:'B'}];   

Slots & Default Content

Slots let you pass HTML content into child components (markup content), useful for building layout components:

 <!-- myCard.html --> <template>   <div>     <h2>{title}</h2>   

  <slot>Default content if none provided</slot>   </div> </template>

 <!-- parent usage --> <c-my-card title="Welcome">  

 <p>Custom body provided by parent</p> </c-my-card>   

Type Conversion & Edge Cases

Because HTML attributes are strings, be careful with numbers/booleans passed as static literals. Always prefer property binding with curly braces ({}) to pass typed data from parent component JS.

Example:count="10" (string) vs count={countValue} (number when countValue is a number).

Best Practices

• Use @api for all properties that should be configurable by parent components.
• Favor property binding ({}) over static string attributes for non-string data.
• Use descriptive property names and kebab-case in markup.
• Make attributes immutable where possible — prefer passing new object references instead of mutating children state.
• Validate inputs inside child components (defensive coding).
• Document public attributes in component README or metadata comments.

Common Mistakes & How to Fix Them

Deploying from LightningStudio

1. Save component files in your Salesforce DX project folder (force-app/main/default/lwc/...)
2. Open Terminal in LightningStudio
3. Authorize org: sfdx force:auth:web:login -a myOrg
4. Deploy component: sfdx force:source:deploy -p force-app/main/default/lwc/myCard
5. Add component to Lightning App Builder or record page (if exposed via meta)

If LightningStudio provides a GUI deploy, you can use that for one-click deployment. Always test in a sandbox first.