Character encoding detector
Get the visual width of a string - the number of columns required to display it
Detect the dominant newline character of a string
Encode HTML character references and character entities
A regex to match any full character, considering weird character ranges.
Transforms the string with only the first character in lower case
Check if the character represented by a given Unicode code point is fullwidth
Parse HTML character references: fast, spec-compliant, positional information
Check if a character is alphabetical
Check if a character is alphanumerical
Check if a character is a whitespace character
Check if a character is hexadecimal
Get the visual width of the widest line in a string - the number of columns required to display it
Easy way to split a string on a given character unless it's quoted or escaped.
Check if a character is a word character
Check if a character is decimal
HTML legacy character entity information
HTML invalid numeric character reference information
HTML character entity information
POSIX character classes for creating regular expressions.