This lightweight retainer is ultra-thin so you will hardly notice it's there. Costa built this retainer to fit most frame styles so you can keep your glasses secure while paddling, boating, relaxing or venturing around town.
(function(){
// Toggle aria-expanded for navbar toggles / dropdowns
document.addEventListener('click', function(e){
var btn = e.target.closest('[data-toggle="aria"]');
if(!btn) return;
var targetSelector = btn.getAttribute('data-target');
var el = targetSelector ? document.querySelector(targetSelector) : null;
var expanded = btn.getAttribute('aria-expanded') === 'true';
btn.setAttribute('aria-expanded', (!expanded).toString());
if(el) el.classList.toggle('open');
});
// Keyboard close for dropdowns/overlays on ESC
document.addEventListener('keydown', function(e){
if(e.key === 'Escape'){
document.querySelectorAll('.open').forEach(function(x){ x.classList.remove('open'); });
document.querySelectorAll('[aria-expanded="true"]').forEach(function(b){ b.setAttribute('aria-expanded','false'); });
}
});
// Brief product-card animation on add-to-cart (use data-add-btn on button)
document.addEventListener('click', function(e){
var add = e.target.closest('[data-add-btn]');
if(!add) return;
var card = add.closest('.card');
if(card){
card.classList.remove('fade-added');
void card.offsetWidth;
card.classList.add('fade-added');
setTimeout(function(){ card.classList.remove('fade-added'); }, 600);
}
});
// Lazy image fallback for images with data-src
var imgs = Array.prototype.slice.call(document.querySelectorAll('img[data-src]'));
if('IntersectionObserver' in window && imgs.length){
var io = new IntersectionObserver(function(entries){
entries.forEach(function(e){
if(e.isIntersecting){
var i = e.target;
i.src = i.getAttribute('data-src');
i.onload = function(){ i.classList.add('loaded'); }
io.unobserve(i);
}
});
},{rootMargin:'120px'});
imgs.forEach(function(i){ io.observe(i); });
} else {
imgs.forEach(function(i){ i.src = i.getAttribute('data-src'); i.onload = function(){ i.classList.add('loaded'); }});
}
})();
