Bird
0
0

You want to bind the value property of an <input> element to a component variable userName. Which is the correct way to update the input's value dynamically when userName changes?

hard📝 component behavior Q8 of 15
Angular - Templates and Data Binding
You want to bind the value property of an <input> element to a component variable userName. Which is the correct way to update the input's value dynamically when userName changes?
A<input [value]="userName">
B<input #value="userName">
C<input (value)="userName">
D<input value="{{userName}}">
Step-by-Step Solution
Solution:
  1. Step 1: Identify dynamic property binding

    To update the input's value dynamically, use property binding with square brackets.
  2. Step 2: Eliminate other options

    uses interpolation which sets initial value but won't update dynamically. is event binding, and is template reference.
  3. Final Answer:

    <input [value]=\"userName\"> -> Option A
  4. Quick Check:

    Use [value] for dynamic input value binding [OK]
Quick Trick: Use [value]="variable" for dynamic input values [OK]
Common Mistakes:
  • Using interpolation which is static after first render
  • Confusing event binding with property binding
  • Using template references incorrectly

Want More Practice?

15+ quiz questions · All difficulty levels · Free

Free Signup - Practice All Questions
More Angular Quizzes