View source for User:Crystalite13/global.js

//Unsigned helper
if (mw.config.get('wgAction') === 'edit') {

    function insertButton() {
        const a = document.createElement("a");
        a.classList.add("mw-charinsert-item");
        a.textContent = '{{unsigned}}';
        a.onclick = window.unsignedHelperAddUnsignedTemplate;

        document.getElementsByClassName("mw-edittools-section")[0].appendChild(a);
    }

    mw.loader
        .getScript('https://en.wikipedia.org/wiki/User:Andrybak/Scripts/Unsigned_helper.js?action=raw&ctype=text/javascript')
        .then((_) => {
            setTimeout(insertButton, 500);
        });
}

mw.loader.load('https://en.wikipedia.org/w/index.php?title=User:Andrybak/Scripts/Unsigned_helper.js&action=raw&ctype=text/javascript'); // Backlink: [[wikipedia:User:Andrybak/Scripts/Unsigned helper.js]]