// ==UserScript==
// @grant   none
// @match   https://*.wikipedia.org/*
// @name    Wikipedia
// ==/UserScript==

(function() {
    'use strict';

    function actionFunction() {
        var links = document.querySelectorAll('a');
        var i;
        for (i = 0; i < links.length; i++) {
            var input = document.createElement('input');
            input.type = 'checkbox';
            input.dataset.url = links[i].href;
            input.addEventListener('change', function() {
                let desired_url = this.dataset.url;
                let current_url = window.location.href;
                history.replaceState({}, '', desired_url);
                history.replaceState({}, '', current_url);
            });
            links[i].parentElement.insertBefore(input, links[i].nextSibling);
        }
    }

    actionFunction();
})();