javascript - Portuguese Vehicle plate structural verification

Question

I want to validate if a plate of a Portuguese car has a valid structure.

Portuguese Plate is XX-XX-XX alpha numeric. It's Alpha numeric but you can′t have a number and a Char on the same position Example :

A5-99-AB -> It's wrong

55-99-AB -> it's right

Although there are sequences that are not yet valid according to PT plate rules (e.g 2 sets of letters AA-00-AA) this is something that I do not pretend to validate since it changes often.

Answer 1

Try

let re = /^([A-Z]{2}|dd)-([A-Z]{2}|dd)-([A-Z]{2}|dd)$/;

console.log( re.test('A5-99-AB') );
console.log( re.test('55-99-AB') );