const cpfMask = (cpf) => { if (/[a-zA-Z]|\W/.test(cpf)) { return cpf.replace(/[a-zA-Z]|\W/, ""); } ...

Helping Jeanne

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Used to find individual posts by id

Finds any date in UK date format with or without century and allows for month names and abreviations as well as ordinal indicators (st, nd, rd, th) This expression uses look behind and look ahead to ensure the date is either at the start of a line or preceeded by whitspace.

Matches all standard UK postcodes whether partial (outward) or full (outward and inward), spaces optional. To enforce spaces remove the ? after (?:\s). There are a few letters not currently in use, this test does not seek to exclude them. The only known postcode this will not validate for is GIR 0A...

This is an adapted version of the regex writen at the book Mastering Reguar Expressions.