Remix - Testing
You wrote a loader test but it fails with "TypeError: Cannot read property 'json' of undefined". What is the most likely cause?
You wrote a loader test but it fails with "TypeError: Cannot read property 'json' of undefined". What is the most likely cause?
medium📝 Debug Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze error meaning
The error means you tried to call .json() on undefined, likely because the loader result is undefined.Step 2: Check async call usage
Not awaiting an async loader call returns a Promise, not the resolved Response, causing undefined access.Final Answer:
You forgot to await the loader call -> Option BQuick Check:
Missing await causes undefined result [OK]
Quick Trick: Always await async loader calls in tests [OK]
Common Mistakes:
MISTAKES- Not awaiting async functions
- Misunderstanding error source
- Incorrect import causing unrelated errors
Master "Testing" in Remix
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Remix Quizzes