{"slug": "how-to-debug-js-errors-using-chatgpt-beginner-s-guide", "title": "How to Debug JS Errors Using ChatGPT(Beginner's Guide)", "summary": "A developer's guide demonstrates how to use ChatGPT to debug common JavaScript errors including ReferenceError, TypeError, SyntaxError, undefined, and NaN. The post provides example code, error outputs, and prompts for ChatGPT to explain and fix each issue, emphasizing the importance of providing context for accurate AI assistance.", "body_md": "Everyone makes mistakes while coding. The good news is that AI tools like ChatGPT can help you understand and fix JavaScript errors faster.\n\nIn this blog, you'll learn how to use ChatGPT to debug common Javascript errors with real examples.\n\n**Reference Error**\n\n```\nconsole.log(username);\n```\n\n**Output:**\n\n```\nReferenceError: username is not defined\n```\n\n**Prompt to ChatGPT:**\n\nExplain why I'm getting *ReferenceError: username is not defined in Javascript* and show me how to fix it.\n\n**Solution:**\n\n``` js\nlet username = \"Janani\";\nconsole.log(username);\n```\n\n**TypeError**\n\n``` js\nconst user = null;\nconsole.log(user.name);\n```\n\n**Output:**\n\n```\nTypeError: Cannot _read_ properties of null (reading _'name'_)\n```\n\n**Prompt to ChatGPT:**\n\nExplain this *TypeError* in simple words and provide the correct code.\n\n**Solution:**\n\n``` js\nconst user = null;\nif(user) {\n   console.log(user.name);\n}\n```\n\n**SyntaxError**\n\n```\nif (true {\n  console.log(\"Hello\");\n})\n```\n\n**Output:**\n\n```\nSyntaxError: Unexpected token '{'\n```\n\n**Prompt to ChatGPT:**\n\nFind the *syntax error* in this code and explain it like I'm a beginner.\n\n**Solution:**\n\n```\nif(true) {\n  console.log(\"Hello\");\n}\n```\n\n**Undefined**\n\n``` js\nlet age;\nconsole.log(age);\n```\n\n**Output:**\n\n```\nundefined\n```\n\n**Prompt to ChatGPT:**\n\nWhy is this variable *undefined?* Explain with an example.\n\n**Solution:**\n\n``` js\nlet age = 25;\nconsole.log(age);\n```\n\n**NaN**\n\n``` js\nlet result = \"Hello\"*5;\nconsole.log(result);\n```\n\n**Output:**\n\n```\nNaN\n```\n\n**Prompt to ChatGPT:**\n\nWhy am I getting *NaN*? How can I avoid it?\n\n**Solution:**\n\n``` js\nlet result = 10*5;\nconsole.log(result);\n```\n\nInstead of asking:\n\nMy code is not working.\n\nAsk:\n\nI'm getting\n\nTypeError: Cannot read properties of undefined. Here's my code. Explain the error in simple words and provide a corrected version.\n\nThe more context you give, the more accurate the AI's answer is likely to be.\n\nAI doesn't just fix your code-it can help you understand why an error happened. Use it as a learning partner rather than simply copying the solution. Over time, you'll become much better at debugging on your own.", "url": "https://wpnews.pro/news/how-to-debug-js-errors-using-chatgpt-beginner-s-guide", "canonical_source": "https://dev.to/janani_jayakumar_fe8ab5ce/how-to-debug-js-errors-using-chatgptbeginners-guide-2f0o", "published_at": "2026-07-18 09:07:59+00:00", "updated_at": "2026-07-18 09:59:42.326554+00:00", "lang": "en", "topics": ["developer-tools", "large-language-models"], "entities": ["ChatGPT", "JavaScript"], "alternates": {"html": "https://wpnews.pro/news/how-to-debug-js-errors-using-chatgpt-beginner-s-guide", "markdown": "https://wpnews.pro/news/how-to-debug-js-errors-using-chatgpt-beginner-s-guide.md", "text": "https://wpnews.pro/news/how-to-debug-js-errors-using-chatgpt-beginner-s-guide.txt", "jsonld": "https://wpnews.pro/news/how-to-debug-js-errors-using-chatgpt-beginner-s-guide.jsonld"}}