User:Xinbenlv/wldc nav.js

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Documentation for this user script can be added at User:Xinbenlv/wldc nav.

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function createMenuItem(name, url) {
    let li = document.createElement('li');
    li.innerHTML='<a href="' + url +'">' + name + '</a>'
    return li;
}

document.querySelector('#p-tb ul.vector-menu-content-list')
  .appendChild(createMenuItem('DoubleCheck', "http://doublecheck.wikiloop.org"))