MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
document.addEventListener('DOMContentLoaded', function() {
  document.querySelectorAll('.poster-container').forEach(container => {
    const items = Array.from(container.querySelectorAll('.poster'));
    if (items.length === 0) return;
    const firstWidth = items[0].offsetWidth;
    items.forEach(item => item.style.width = firstWidth + 'px');
  });
});