Angular - Pipes
You want to create a pipe that formats a date string to 'YYYY-MM-DD' but only if the input is a valid date. How should you handle invalid inputs in your custom pipe?
You want to create a pipe that formats a date string to 'YYYY-MM-DD' but only if the input is a valid date. How should you handle invalid inputs in your custom pipe?
hard📝 component behavior Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Consider user experience for invalid input
Throwing errors or returning null can break the UI or cause unexpected behavior.Step 2: Choose safe fallback
Returning the original input unchanged is safe and lets the UI show raw data if invalid.Final Answer:
Return the original input unchanged -> Option AQuick Check:
Handle invalid input safely by returning original [OK]
Quick Trick: Return original input if invalid to avoid errors [OK]
Common Mistakes:
- Throwing errors inside pipes
- Returning null causing blank UI
- Returning empty string hiding data
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