Check if the character represented by a given Unicode code point is fullwidth

A library for validating credit card fields

Convert and detect character encodings in JavaScript

Maps lines and columns to character offsets and back.

Restrict inputs to certain valid characters (e.g. formatting phone or card numbers)

An absurdly small glob matcher that packs a punch.

Parser for FTP server responses

A library for determining credit card type

A universally-unique, lexicographically-sortable, identifier generator

Core logic for the hover-card widget implemented as a state machine

Check if a character is alphanumerical

library for handling character cards formats

Serialize (encode) HTML character references

Check if a character is alphabetical

Webcomponent character-card following open-wc recommendations

Parse HTML character references

Count how often a character (or substring) is used in a string

Check if a character is decimal

A JavaScript text diff implementation.

Legacy list of escapable characters in markdown