Learn Web Development | Day 74: Special Route Files : Not Found Page, Error Page & others in Next js

Описание: Welcome to Day 74 of the Learn Web Development Series!
Today we dive deep into Special Route Files in Next.js, one of the most misunderstood but MOST searched topics by beginners. This video answers all the common questions like:
What are special route files in Next.js?
What is not-found.tsx used for?
How do I create a custom error page in Next.js?
What does loading.tsx really do?
What is the difference between layout.tsx, page.tsx, and template.tsx?
What is route.tsx and when do I use it?
How does Next.js decide which file to run first?
What are the best practices for structuring routes?

This video breaks everything down with clear explanations, real-world examples, and VS Code demos so you fully understand how routing truly works in Next.js.

🔍 What You Will Learn
✔ Meaning & purpose of each special route file
✔ When Next.js automatically uses these files
✔ How to add custom logic to not-found.tsx
✔ How to fix app errors using error.tsx
✔ Why loading.tsx improves UX and speeds perception
✔ When to choose layout.tsx vs template.tsx
✔ How page.tsx works as the main route entry
✔ How route.tsx enables advanced backend-like logic (GET, POST)
✔ How all route files work together in the App Router

❓ Frequently Asked Questions (SEO Answers)
Q: What is the purpose of special route files in Next.js?
They control how your app behaves for errors, loading UI, routing structure, API-like endpoints, and layout rendering.

Q: What is not-found.tsx?
It’s the file used to show a custom 404 page when a route doesn’t exist.

Q: What is error.tsx used for?
This file catches errors on a specific route and prevents your entire app from crashing.

Q: What is loading.tsx?
A special file used to display a loading UI during slow data fetching or dynamic rendering.

Q: Difference between layout.tsx and template.tsx?
layout.tsx is persistent across navigation (shared), while template.tsx resets UI each time a route loads.

Q: What is route.tsx?
A file for defining server-side logic (GET, POST, PUT, DELETE) similar to building API routes.

This video answers ALL of these and more — perfect for beginners and intermediate developers.

Timestamps
0:00 – What Are Special Route Files in Next.js? Full Overview
0:30 – Understanding Day 74: Why Next.js Special Files Matter
1:00 – Recap of Day 73: Header Pop Up Menu & Navigation Foundation
2:25 – How to Create a Custom 404 Page Using not-found.tsx
35:35 – How error.tsx Works & How to Fix App Crashes in Next.js
58:00 – When and Why to Use loading.tsx for Smooth UX
1:02:10 – layout.tsx Explained: Global UI, Shared Components & Structure
1:02:44 – page.tsx Fully Explained: The Main Entry File for Routes
1:03:10 – template.tsx: When to Use It vs layout.tsx (Big Difference)
1:04:00 – route.tsx: Building GET, POST, PUT API-Like Endpoints in Next.js

Hashtags
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