Removes index.html from 11ty URL strings to create prettier permalinks. Usage {{url | permalink}} (source: https://paulrobertlloyd.com/)

11ty_permalink.js

/**
 * Removes (index).html from a string
 *
 * @param {String} str URL, i.e. /page/index.html
 * @return {String} Permalinkable URL, i.e. /page/
 *
 */
module.exports = function (str) {
  return str.replace(/(?:index)?\.html/g, '');
};