Understanding Reactive Properties in LWC | @track & Default Reactivity Explained

Not all properties in Lightning Web Components re-render automatically — and knowing the difference is what separates a beginner from someone who truly understands the LWC framework! 🚀 In this video, we break down Reactive Properties in LWC — what they are, how they work, and when to use each type with a real hands-on project. ───────────────────────────────────────── 📌 What You'll Learn in This Video: ───────────────────────────────────────── ✅ What are Reactive Properties in LWC? ✅ Default Reactive Properties (No Decorator needed for primitives) ✅ Deep Reactivity using @track decorator for Objects & Arrays ✅ Difference between @track vs @api ✅ When to use @track and when NOT to ✅ Best Practices for Reactive Properties in LWC ✅ Hands-on Project: Build a Reactive Shopping Cart Component ───────────────────────────────────────── ⏱️ Timestamps: ───────────────────────────────────────── 00:00 - Introduction 00:38 - What are Reactive Properties? 01:00 - Types of Reactive Properties (Decorators) 02:16 - Default Reactive Properties (Primitives) 03:04 - Deep Reactive Properties using @track 03:16 - Live Demo: User Card Component (Problem without @track) 05:33 - Fixing with @track Decorator 06:39 - @track vs Default Reactivity - Full Comparison 08:41 - Reactive Arrays in LWC (Assignment) 10:15 - @track vs @api - Key Differences 11:46 - Best Practices for Reactive Properties 12:29 - Hands-On: Building a Reactive Shopping Cart 🛒 22:39 - Wrap Up & Summary ───────────────────────────────────────── 🔔 Stay Connected: ───────────────────────────────────────── If this video helped you, don't forget to: 👍 Hit the LIKE button 💬 Drop your questions in the COMMENTS — they'll be answered! 🔔 SUBSCRIBE & hit the Bell Icon to get notified reactively 😄 ───────────────────────────────────────── #LWC #LightningWebComponents #Salesforce #ReactiveProperties #TrackDecorator #SalesforceDeveloper #SalesforceTutorial #LWCTutorial #AtTrack #AtAPI #SalesforceDevelopment #SFDeveloper #SalesforceTraining #Trailhead #SalesforceAdmin #JavaScriptFramework #WebComponents #ShoppingCart #SalesforceEcosystem #SalesforceCommunity #CloudComputing #CRMDeveloper #LWCSeries #SalesforceBeginners #LearnSalesforce #SalesforceClasses