react-ga/src/utils/toTitleCase.js

React Google Analytics Module

/**
 * To Title Case 2.1 - http://individed.com/code/to-title-case/
 * Copyright 2008-2013 David Gouch. Licensed under the MIT License.
 * https://github.com/gouch/to-title-case
 */

import trim from './trim';

const smallWords =
  /^(a|an|and|as|at|but|by|en|for|if|in|nor|of|on|or|per|the|to|vs?\.?|via)$/i;
// test
export default function toTitleCase(string) {
  return trim(string).replace(
    /[A-Za-z0-9\u00C0-\u00FF]+[^\s-]*/g,
    (match, index, title) => {
      if (
        index > 0 &&
        index + match.length !== title.length &&
        match.search(smallWords) > -1 &&
        title.charAt(index - 2) !== ':' &&
        (title.charAt(index + match.length) !== '-' ||
          title.charAt(index - 1) === '-') &&
        title.charAt(index - 1).search(/[^\s-]/) < 0
      ) {
        return match.toLowerCase();
      }

      if (match.substr(1).search(/[A-Z]|\../) > -1) {
        return match;
      }

      return match.charAt(0).toUpperCase() + match.substr(1);
    }
  );
}