Checks page for url change, then add target blank attribute to all external links

Opens external links on feddit in new tab

// ==UserScript==
// @name         Open feddit links in new tab
// @version      0.1
// @description  Opens feddit links in new tab
// @author       voodoocode
// @match        feddit.de/*
// @icon         https://feddit.de/pictrs/image/uI7Q7MuePp.png
// @grant        none
// ==/UserScript==

(function () {
    'use strict';
    let pageURLCheckTimer = setInterval (
        function () {
            if (this.lastPathStr !== location.pathname
                || this.lastQueryStr !== location.search
                || this.lastPathStr === null
                || this.lastQueryStr === null
               ) {
                this.lastPathStr = location.pathname;
                this.lastQueryStr = location.search;
                main();
            }
        }
        , 200
    );

    function main() {
        setTimeout(()=> {
            let as = document.querySelectorAll('a[href^="http"]')
            as.forEach(function (a) {
                a.setAttribute('target', '_blank')
            })
        }, 500);
    }
})();