[Solved] Why does this code throw an error?const fa = new FormArray([]);fa.removeAt(5); - Ans: Index 5 does not exist in the FormArray | Angular

Angular - Reactive Forms

Why does this code throw an error?

const fa = new FormArray([]);
fa.removeAt(5);

AIndex 5 does not exist in the FormArray

BremoveAt() requires a FormControl argument

CFormArray cannot be empty

DremoveAt() is not a method of FormArray

Step-by-Step Solution

Solution:

Step 1: Check FormArray length
The array is empty, so index 5 is out of bounds.
Step 2: Understand removeAt behavior
Calling removeAt(5) on an empty array causes an error because that index does not exist.
Final Answer:
Index 5 does not exist in the FormArray -> Option A
Quick Check:
removeAt index must exist [OK]

Quick Trick: removeAt index must be valid [OK]

Common Mistakes:

MISTAKES

Master "Reactive Forms" in Angular

9 interactive learning modes - each teaches the same concept differently

More Angular Quizzes

Why does this code throw an error?