maxLength property
Characters
For a specific definition of what is considered a character, see the characters package on Pub, which is what Flutter uses to delineate characters. In general, even complex characters like surrogate pairs and extended grapheme clusters are correctly interpreted by Flutter as each being a single user-perceived character.
For instance, the character "ö" can be represented as '\u{006F}\u{0308}', which is the letter "o" followed by a composed diaeresis "¨", or it can be represented as '\u{00F6}', which is the Unicode scalar value "LATIN SMALL LETTER O WITH DIAERESIS". It will be counted as a single character in both cases.
Similarly, some emoji are represented by multiple scalar values. The Unicode "THUMBS UP SIGN + MEDIUM SKIN TONE MODIFIER", "👍🏽"is counted as a single character, even though it is a combination of two Unicode scalar values, '\u{1F44D}\u{1F3FD}'.
Implementation
final int? maxLength;