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Shariful Ehasan
Shariful Ehasan

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How do you debug JavaScript efficiently?

Debugging JavaScript can be a smooth process or a frustrating one—depending on your tools, techniques, and experience.

For some, console.log() is enough. Others rely on browser DevTools, VS Code breakpoints, stack traces, or extensions like Debugger for Chrome.

Here are some workflow when something breaks:

1 ✅ First, use console.log() to confirm whether a block of code is even running.

2 🐞 Then check browser DevTools (usually Chrome) for:

  • Console errors
  • Network requests (especially failed ones)
  • DOM state and real-time variable inspection

3 ⛔ If the bug is async-related (like Promises or fetch), check the Network tab to see response bodies and status codes.

🧠 Finally, For the complex logic place breakpoints and step through line-by-line in DevTools or VS Code.

How do you debug JavaScript?

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