Angular - Reactive Forms
Which method is used to listen for value changes in a
FormControl?Which method is used to listen for value changes in a FormControl?
easy🧠 Conceptual Q1 of 15
Step-by-Step Solution
Solution:
Step 1: Understand
TheFormControleventsvalueChangesproperty is an observable that emits events when the control's value changes.Step 2: Identify the method to listen to changes
To react to these changes, you subscribe tovalueChangesusingsubscribe().Final Answer:
valueChanges.subscribe() -> Option AQuick Check:
Listening to value changes = valueChanges.subscribe() [OK]
Quick Trick: Use valueChanges.subscribe() to track FormControl value updates [OK]
Common Mistakes:
MISTAKES- Confusing setValue() with listening to changes
- Using patchValue() which is for FormGroup/FormArray
- Trying to listen with reset() which resets the control
Master "Reactive Forms" in Angular
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