MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
// Ensures class card images use the intended foreground image if data-src is present.
(function () {
  function applyDataSrc() {
    var images = document.querySelectorAll('.mw-card-image img[data-src]');
    for (var i = 0; i < images.length; i++) {
      var img = images[i];
      var dataSrc = img.getAttribute('data-src');
      if (dataSrc && img.getAttribute('src') !== dataSrc) {
        img.setAttribute('src', dataSrc);
      }
    }
  }

  if (document.readyState === 'loading') {
    document.addEventListener('DOMContentLoaded', applyDataSrc);
  } else {
    applyDataSrc();
  }
})();