Angular - Reactive Forms
Which Angular validator ensures a form control is not left empty?
Which Angular validator ensures a form control is not left empty?
easy🧠 Conceptual Q11 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the purpose of
This validator checks if the input field has any value and marks it invalid if empty.Validators.requiredStep 2: Compare with other validators
minLengthchecks length,patternchecks format, andmaxLengthlimits length, but none enforce non-empty input.Final Answer:
Validators.required -> Option CQuick Check:
Non-empty input = Validators.required [OK]
Quick Trick: Required means input cannot be empty [OK]
Common Mistakes:
MISTAKES- Confusing required with minLength
- Using pattern to check empty input
- Thinking maxLength enforces presence
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