MediaWiki:Common.js

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(function () {
  const banner = document.getElementById('icelist-donate-banner');
  if (!banner) return;

  if (localStorage.getItem('icelistDonateBannerDismissed') === 'true') {
    banner.style.display = 'none';
    return;
  }

  const dismiss = document.getElementById('icelist-donate-dismiss');
  if (dismiss) {
    dismiss.addEventListener('click', function () {
      banner.style.display = 'none';
      localStorage.setItem('icelistDonateBannerDismissed', 'true');
    });
  }
})();