gallery.querySelector('.photogallery-image-wrapper-hidden').classList.toggle('photogallery-image-wrapper-hidden');gallery.querySelector('.photogallery-image-wrapper').classList.toggle('photogallery-image-wrapper-hidden');document.addEventListener('DOMContentLoaded', function() {
var galleries = document.querySelectorAll('.photogallery');
if (galleries) {
[].forEach.call(galleries, function (gallery) {
gallery.addEventListener('load', function () {
var toggle = gallery.querySelector('.photogallery-year-toggle');
var hiddenWrapper = gallery.querySelector('.photogallery-image-wrapper-hidden');
toggle.addEventListener('click', function (e) {
e.preventDefault();
hiddenWrapper.classList.toggle('photogallery-image-wrapper-hidden');
toggle.classList.toggle('photogallery-year-toggle-open');
});
});
});
};
});<html>
<body>
<div class="inner"></div>
<script src="/js/myscript.js"></script>
</body>
</html>