10. phone number input

Create a PhoneNumberInput component.

1. only accepts numerical digits
2. format the number automatically as (123)456-7890 by

• adding the parenthesis when the 4th digit is entered
• also adding - before 7th digit

You can use the default text input without any styling.

Follow-up

What if user removes some digits in the middle, does caret jumps to the end in your approach?

caret position is not covered in our tests.