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\D allows for non-digit characters, meaning a-z would be allowed.
If that's the case, how we work around this?
I can think of the 2 things.. 1) Use a stricter regexp 2) restrict input to digits, spaces, and dashes (doesn't sound like a good practice) 3) other?
Umidjon Khaitov8,884 Points
Good question! I think it is obvious that no one writes letters in telephone number input, maybe that's why Joel used \D