MediaWiki:Common.js

Note: After publishing, you may have to bypass your browser's cache to see the changes.

Firefox / Safari: Hold Shift while clicking Reload, or press either Ctrl-F5 or Ctrl-R (⌘-R on a Mac)
Google Chrome: Press Ctrl-Shift-R (⌘-Shift-R on a Mac)
Internet Explorer / Edge: Hold Ctrl while clicking Refresh, or press Ctrl-F5
Opera: Press Ctrl-F5.

document.addEventListener('DOMContentLoaded', function () {
    const closeButton = document.getElementById('sitenotice-close');
    if (closeButton) {
        closeButton.addEventListener('click', function () {
            const banner = document.getElementById('sitenotice-banner');
            if (banner) {
                banner.style.display = 'none'; // Hides the banner
            }
        });
    }
});