'use strict'; module.exports = string => { if (typeof string !== 'string') { throw new TypeError('Expected a string'); } // Escape characters with special meaning either inside or outside character sets. // Use a simple backslash escape when it’s always valid, and a \unnnn escape when the simpler form would be disallowed by Unicode patterns’ stricter grammar. return string .replace(/[|\\{}()[\]^$+*?.]/g, '\\$&') .replace(/-/g, '\\x2d'); };