sanitaze_filename.js

var illegalRe = /[\/\?<>\\:\*\|"]/g;
var controlRe = /[\x00-\x1f\x80-\x9f]/g;
var reservedRe = /^\.+$/;
var windowsReservedRe = /^(con|prn|aux|nul|com[0-9]|lpt[0-9])(\..*)?$/i;
var windowsTrailingRe = /[\. ]+$/;

function truncate(str, num) {
    if (str.length > num) {
      return str.slice(0, num) + "...";
    } else {
      return str;
    }
  }
  

function sanitize(input, replacement) {
  if (typeof input !== 'string') {
    throw new Error('Input must be string');
  }
  var sanitized = input
    .replace(illegalRe, replacement)
    .replace(controlRe, replacement)
    .replace(reservedRe, replacement)
    .replace(windowsReservedRe, replacement)
    .replace(windowsTrailingRe, replacement);
  return truncate(sanitized, 255);
}

module.exports = function (input, options) {
  var replacement = (options && options.replacement) || '';
  var output = sanitize(input, replacement);
  if (replacement === '') {
    return output;
  }
  return sanitize(output, '');
};