url method
FormFieldValidator
that requires the field's value to be a valid url.
Implementation
static FormFieldValidator url({
String errorText = "This field requires a valid email address.",
}) {
return (val) {
if (val != null && val.isNotEmpty) {
Pattern pattern =
r"(https?|ftp)://([-A-Z0-9.]+)(/[-A-Z0-9+&@#/%=~_|!:,.;]*)?(\?[A-Z0-9+&@#/%=~_|!:,.;]*)?";
if (!RegExp(pattern).hasMatch(val)) return errorText;
}
};
}