A country picker with flags, a dial code that cannot be edited away, and as-you-type formatting. v-model is E.164 — +32470123456 — or null while empty. Validation rules load per calling code on first interaction, so nothing downloads until the user reaches the field, and valid is undefined until they arrive.
Value: null
— Names come from Intl.DisplayNames and are collated in the viewer's language at no download cost. Switch and reopen the picker — the order changes, because an alphabetical list of English names is not alphabetical to a Dutch reader.