-# Allowed formats:
-# 0123456789
-# 01 23 45 67 89
-# 01.23.45.67.89
-# 0123 45.67.89
-# 0033 123-456-789
-# 0035 123-456-789
-# 0033 123-456-789
-# 0033(0)123456789
-# +33-1.23.45.67.89
-# +33 - 123 456 789
-# +33(0) 123 456 789
-# +33 (0)123 45 67 89
-# +33 (0)1 2345-6789
-# +33(0) - 123456789
-# +1(0) - 123456789
-# +2 123456789
-# 012345678
-# 01234567890
= form.phone_field :value,
  placeholder: champ.libelle,
  required: champ.mandatory?,
  pattern: "([\\+\\d\\(][\\(\\)\\s\\.\\-\\d]{4,}\\d)"