in slick/slick.js [2588:2621]
Slick.prototype.initADA = function() {
var _ = this;
_.$slides.add(_.$slideTrack.find('.slick-cloned')).attr({
'aria-hidden': 'true',
'tabindex': '-1'
}).find('a, input, button, select').attr({
'tabindex': '-1'
});
_.$slideTrack.attr('role', 'listbox');
_.$slides.not(_.$slideTrack.find('.slick-cloned')).each(function(i) {
$(this).attr({
'role': 'option',
'aria-describedby': 'slick-slide' + _.instanceUid + i + ''
});
});
if (_.$dots !== null) {
_.$dots.attr('role', 'tablist').find('li').each(function(i) {
$(this).attr({
'role': 'presentation',
'aria-selected': 'false',
'aria-controls': 'navigation' + _.instanceUid + i + '',
'id': 'slick-slide' + _.instanceUid + i + ''
});
})
.first().attr('aria-selected', 'true').end()
.find('button').attr('role', 'button').end()
.closest('div').attr('role', 'toolbar');
}
_.activateADA();
};