(function() {
    // Function to check if a link is external, excluding Wikimedia and Wikipedia domains
    function isExternalLink(link) {
        const hostname = window.location.hostname;
        const excludedDomains = ['wikimedia.org', 'wikipedia.org'];

        // Check if the link is external and not from Wikimedia or Wikipedia
        return link.hostname !== hostname && link.hostname !== '' &&
               !excludedDomains.some(domain => link.hostname.endsWith(domain));
    }

    // Get all anchor elements
    const anchors = document.querySelectorAll('a');

    // Loop through all anchor elements
    anchors.forEach(function(anchor) {
        const href = anchor.getAttribute('href');
        if (href && isExternalLink(anchor)) {
            // Update the href to the link checker tool with the original URL as a query parameter
            anchor.setAttribute('href', 'https://molecularbot2.toolforge.org/linkCheck.html?url=' + encodeURIComponent(href));
        }
    });
})();