Network Debugging

Table of Contents

• Overview
• When to Use
• Quick Start
• Reference Guides
• Best Practices

Overview

Network debugging identifies connectivity issues, latency problems, and data transmission errors that impact application performance.

When to Use

• Slow loading times
• Failed requests
• Intermittent connectivity
• CORS errors
• SSL/TLS issues
• API communication problems

Quick Start

Minimal working example:

Chrome DevTools Network Tab:

Columns:
  - Name: Request file/endpoint
  - Status: HTTP status code
  - Type: Resource type (xhr, fetch, etc)
  - Initiator: What triggered request
  - Size: Resource size / transferred size
  - Time: Total time to complete
  - Waterfall: Timeline visualization

Timeline Breakdown:
  - Queueing: Waiting in queue
  - DNS: Domain name resolution
  - Initial connection: TCP handshake
  - SSL: SSL/TLS negotiation
  - Request sent: Time to send request
  - Waiting (TTFB): Time to first byte
  - Content Download: Receiving response

---
Network Conditions:

Throttling Presets:
  - Fast 3G: 1.6 Mbps down, 750 Kbps up
// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide	Contents
Browser Network Tools	Browser Network Tools
Common Network Issues	Common Network Issues
Debugging Tools & Techniques	Debugging Tools & Techniques
Checklist	Checklist

Best Practices

✅ DO

• Follow established patterns and conventions
• Write clean, maintainable code
• Add appropriate documentation
• Test thoroughly before deploying

❌ DON'T

• Skip testing or validation
• Ignore error handling
• Hard-code configuration values