rengine/static/custom/custom.js

// seperate hostname and url
// Referenced from https://stackoverflow.com/questions/736513/how-do-i-parse-a-url-into-hostname-and-path-in-javascript
function getParsedURL(url) {
    var parser = new URL(url);
    return parser.pathname+parser.search;
};

function getCookie(name) {
    var cookieValue = null;
    if (document.cookie && document.cookie !== '') {
        var cookies = document.cookie.split(';');
        for (var i = 0; i < cookies.length; i++) {
            var cookie = jQuery.trim(cookies[i]);
            // Does this cookie string begin with the name we want?
            if (cookie.substring(0, name.length + 1) === (name + '=')) {
                cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                break;
            }
        }
    }
    return cookieValue;
}

// Source: https://portswigger.net/web-security/cross-site-scripting/preventing#encode-data-on-output
function htmlEncode(str){
  return String(str).replace(/[^\w. ]/gi, function(c){
     return '&#'+c.charCodeAt(0)+';';
  });
}