<!doctype html>
for HTML5<html lang="en">
<button disabled>
rather than <button class="disabled">
<a role="tab" aria-selected="true">
rather than <a class="tab" class="selected">
<i>
tags are not used as CSS icon holders. Use a <span>
element instead.aria-hidden="true"
<button class="icon-arrow-right" aria-label="Next slide" />
autocomplete="off"
role="combobox"
aria-expanded
attributearia-activedescendant
staterole="listbox"
role="option"
aria-selected="true"
aria-autocomplete="list"
role="dialog"
aria-labelledby
or aria-label
aria-modal="true"
is presentESC
key