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NestJS Debugging

NestJS debugging wo process hai jisme NestJS application me bugs, errors, aur unexpected behavior…

Overview

NestJS Debugging — Quick Facts

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Field: Detail

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Topic: NestJS Debugging

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Category: Software Engineering / Debugging

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Framework: NestJS (Node.js + TypeScript)

Topic 1

Infobox

📚 | Field | Detail | |---|---| | Topic | NestJS Debugging | | Category | Software…

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Debugging Tools Comparison

💡 | Tool | Type | Use Case | Strengths | Limitations | |---|---|---|---|---| | VS Code…

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VS Code Debugging

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.vscode/launch.json me NestJS…

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Type: node, request: launch,…

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runtimeArgs me --nolazy flag for…

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TypeScript debugging ke liye…

Topic 4

Node Inspector (Chrome DevTools)

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Application start karo node…

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Chrome me chrome://inspect open…

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DevTools automatically NestJS…

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Breakpoints — Source panel me set…

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NestJS Built-in Logger

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NestJS me Logger class built-in…

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Log levels: log, error, warn,…

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Application level par log level…

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Har class/module ka apna context:…

Topic 6

Debugging Common Issues

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"Nest can't resolve dependencies"…

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Causes: module me provider…

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Debug: error message me kaunsa…

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Module A imports Module B, Module…

Topic 7

Request Lifecycle aur Debugging

🌟 NestJS me request ek specific lifecycle follow karti hai. Debugging me correct layer…

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Debugging Workflow

🚀 `mermaid flowchart TD A[Bug Reported /<br>Error Detected] --> B[Reproduce the…

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Error Tracking Integration

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@sentry/node install karo. Global…

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Stack traces, breadcrumbs, user…

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Alerts configure karo — new error…

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JSON format me logs —…

Topic 10

Debugging Microservices

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Microservice architecture me ek…

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OpenTelemetry ya Jaeger se…

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Kaunsi service me latency ya error…

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Har incoming request ko unique ID…

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Best Practices

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console.log se aage badho. NestJS…

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Har log me context, level, aur…

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TypeScript debugging ke liye…

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logger: ['log', 'error', 'warn',…

Topic 12

Anti-Patterns (Avoid These)

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50 console.log statements…

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Logger use karo — scoped, leveled,…

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Error stack trace hai lekin…

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Stack trace = exact location +…

Topic 13

Challenges

🔑 1. Layered Architecture — Multiple layers (guards, pipes, interceptors) me debugging…

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Benefits

✨ 1. Faster Bug Resolution — Systematic debugging se root cause jaldi milta hai. 2. Better…

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Glossary

🌟 | Term | Meaning | |---|---| | Breakpoint | Code me specific point jahan execution ruke…

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Disclaimer

🚀 Yeh article Aliens Wiki ke liye likha gaya hai, Hinglish (Roman) me. Yeh informational…

Comparison

Debugging Tools Comparison

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VS Code Debugger: IDE Integrated

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Node --inspect: Runtime

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NestJS Logger: Built-in

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

NestJS Debugging ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

NestJS Debugging ka 'Topic' kya hai?

Complete! 🎉

NestJS Debugging Complete!

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