Validate Canadian Postal Code Regex

Question

I have a script written in JavaScript to Validate Canadian Postal Codes using Regex, however it does not seem to be working. Here is the script:

If statement:

Answer 1

A regex approach can validate the format of a Canadian postcode, but it's not sufficient to guarantee that the postcode actually exists.

For example: A9A 0A0 looks like a valid Canadian postcode, but the forward sortation area A9A doesn't actually exist.

Are you sure you wouldn't rather do some kind of lookup against an official list of postcodes?