document.addEventListener('DOMContentLoaded', function () {
/* copy alt text from the main image to its lazy-load duplicate */
document.querySelectorAll('img[data-orig-src][alt=""]').forEach(function (lazy) {
var real = lazy.parentElement.querySelector('img:not([data-orig-src])[alt]');
lazy.alt = real && real.alt ? real.alt : ''; // decorative if none
});
});