01Severity
Normal debugging risk
डेवलपर के लिए AI उपकरण
Error और snippet को causes, steps और fix direction में बदलता है
इनपुट तरीका
Exact error और सबसे छोटा related code paste करेंInput
परिणाम
Severity
Normal debugging risk
Most likely cause
A value is undefined or null before property access
Debug steps
1. Reproduce with the smallest input that still fails
2. Log the value immediately before the failing line
3. Check network status response body and server logs
4. Add guards for missing data before using nested fields
5. Write one regression test or manual checklist after fixing
Repair template
const userName = data?.user?.name;
if (!userName) {
throw new Error("User name is missing from API response");
}
return userName;
What to verify
- The same input no longer fails
- Missing data produces a clear error
- The fix does not hide a real server or auth issueNormal debugging risk
A value is undefined or null before property access
1. Reproduce with the smallest input that still fails 2. Log the value immediately before the failing line 3. Check network status response body and server logs 4. Add guards for missing data before using nested fields 5. Write one regression test or manual checklist after fixing
const userName = data?.user?.name; if (!userName) { throw new Error("User name is missing from API response"); } return userName;
- The same input no longer fails - Missing data produces a clear error - The fix does not hide a real server or auth issue
क्या करता है
किसके लिए
उदाहरण
Bug उदाहरण
इनपुट: TypeError Cannot read properties of undefined reading name plus the failing function
आउटपुट: Severity likely cause debug steps repair template and verification checklist
FAQ और सीमाएं
Paste the exact error message stack trace if available and the smallest related code snippet.
Smaller reproductions make the real failing value and line easier to isolate.
सीमाएं