string-length 
Get the real length of a string - by correctly counting astral symbols and ignoring ansi escape codes
String#length errornously counts astral symbols as two characters.
Install
$ npm install string-length
Usage
const stringLength = require('string-length');
'🐴'.length;
//=> 2
stringLength('🐴');
//=> 1
stringLength('\u001B[1municorn\u001B[22m');
//=> 7
Related
- string-width - Get visual width of a string
License
MIT © Sindre Sorhus