Bookmarklet – Go up one directory in URL path

go-up-bookmarklet.js

javascript:(function(num) {
    /* 
     * Goes up one or more directory in path or remove path hash or query.
     * To use this, condense into oneline then, paste the string into a
     * bookmark in a web browser.
     * Replace the "1" at the end of the script to change how many levels to go up.
     */
    var newUrl = new URL(window.location);

    for (var i = 0; i < num; i++) {
        if (newUrl.hash != '') {
            newUrl = new URL(newUrl.protocol + '//' + newUrl.host + newUrl.pathname + newUrl.search);
        }
        else if (newUrl.search != '') {
            newUrl = new URL(newUrl.protocol + '//' + newUrl.host + newUrl.pathname);
        }
        else {
            var slashIndex = newUrl.pathname.lastIndexOf('/', newUrl.pathname.length - 2);
            if (slashIndex != -1) {
                newUrl.pathname = newUrl.pathname.slice(0,slashIndex);
            }
            else if (newUrl.pathname != '/' && newUrl.pathname != '') {
                newUrl.pathname = '';
            }
            else {
                var dotIndex = newUrl.host.indexOf('.');
                if (dotIndex != -1) {
                    newUrl.host = newUrl.host.slice(dotIndex + 1);
                }
            }
        }
    }
    window.location = newUrl;
})(1)