是:not(:hover)和:hover是隐藏可访问元素的安全方法?

Sometimes it appears helpful to make certain page elements only visible on e.g. hovers. An example is stackoverflow's "feedback - Was this post useful to you?"-widget. As those elements might be crucial to the interface, such a show-on-hover-feature should be a progressive enhancement or, in other terms, unobtrusive and degrade gracefully.Sometimes it appears helpful to make certain pa