debugging

Diagnose code errors across TypeScript, React, and Next.js using console tools, type checking, and Git.

4|1|Updated Sep 21, 2025

Search Tags:#typescript #debugging #troubleshooting #react #error handling #next.js

Ready to run

npx skills add https://github.com/xmark168/VibeSDLC --skill debugging-xmark168

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: debugging
Source: https://github.com/xmark168/VibeSDLC/tree/main/backend/app/agents/developer/src/skills/general/debugging
Command: npx skills add https://github.com/xmark168/VibeSDLC --skill debugging-xmark168

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps developers systematically identify, analyze, and fix various types of code errors, including runtime bugs, build issues, and linting problems, leading to more stable and reliable software.

Core Features & Use Cases

Error Analysis: Understand the root cause of TypeError, ReferenceError, and asynchronous errors.
Debugging Strategies: Apply a structured process from understanding the error to verifying the fix.
Tool Utilization: Leverage console methods, TypeScript type checking, and Git for effective debugging.
Use Case: When encountering a TypeError: Cannot read properties of undefined in your React component, use this Skill to follow the step-by-step guide to pinpoint the cause and apply the correct fix using optional chaining or default values.

Quick Start

Use the debugging skill to analyze the 'TypeError: X is not a function' error message.

Frequently Asked Questions about debugging

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I fix TypeError Cannot read properties of undefined in React?▼

To resolve this TypeError in React, analyze the component state and apply optional chaining or default values to prevent undefined access. This structured debugging approach helps pinpoint the exact variable causing the runtime error.

What is the best way to troubleshoot asynchronous errors in Next.js?▼

Troubleshooting asynchronous errors in Next.js requires understanding the error message and reproducing the issue to analyze the root cause. A systematic approach leverages console tools and type checking to trace async execution paths and resolve promise rejections.

How do I use TypeScript type checking to find the root cause of a ReferenceError?▼

Use TypeScript type checking to identify the root cause of a ReferenceError by tracing variable scopes and validating object definitions before runtime. This method catches undefined variables and structural type mismatches during compilation.

Can I use Git to systematically isolate code errors in TypeScript?▼

Yes, you can use Git to systematically isolate code errors in TypeScript by checking commit histories and reverting changes to reproduce the issue. This helps identify exactly which modification introduced the runtime bug.

Why does my Next.js application throw a TypeError X is not a function?▼

A Next.js application throws this TypeError when a function is called on an incorrect type or an imported module is undefined. Debugging involves analyzing the stack trace and verifying module imports alongside component props.