Validation of User Input with Regex
Let's apply the rules to individual fields now so they can validate appropriately
We'll cover the following
Name #
Original rule: Non-empty string of alpha characters
Without regex, the non-empty part can be enforced by .length
and the alpha
part can be enforced by checking if the character is within the list ['a', 'b', ..., 'z', 'A', 'B', ..., 'Z']
. With regex, the alpha part is matched by /[a-zA-Z]/
(don’t forget capital letters!), and the nonempty part through the symbol +
(which means one or more). So that gives us:
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