![]() ![]() In this way, you can validate TextFormFiled or TextField data with Dart Regex and package in Flutter App. matches - check if string str matches the Regex pattern.isUUID - check if the string is a UUID (version 3, 4 or 5).Tap originated in the United States through the fusion of several ethnic percussive dances, primarily West African sacred and secular step dances (gioube) and Scottish, Irish, and English clog dances, hornpipes, and jigs. isUppercase - check if the string str is uppercase. tap dance, style of dance in which a dancer wearing shoes fitted with heel and toe taps sounds out audible beats by rhythmically striking the floor or any other hard surface.isPostalCode - Check if the string is postal or zip code.isNumeric - check if the string str contains only numbers.isNull - check if the string str is null.isMongoId - check if the string is a valid hex-encoded representation of a MongoDB ObjectId.isLowercase - check if the string str is lowercase.isLength(String str, int min, ) - check if the length of the string str falls in a range.isJSON - check if the string is valid JSON.isISBN- check if the string is an ISBN (version 10 or 13).isIP - check if the string str is IP version 4 or 6.isInt - check if the string str is an integer.It's no longer recommended for new development. It requires a method that has the Async suffix and one or more events, event handler delegate types, and EventArg -derived types. ![]()
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