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/*
	Improved screen reader only CSS class
	@author Gaël Poupard
		@note Based on Yahoo!'s technique
		@author Thierry Koblentz
		@see https://developer.yahoo.com/blogs/ydn/clip-hidden-content-better-accessibility-53456.html
	* 1.
		@note `clip` is deprecated but works everywhere
		@see https://developer.mozilla.org/en-US/docs/Web/CSS/clip
	* 2.
		@note `clip-path` is the future-proof version, but not very well supported yet
		@see https://developer.mozilla.org/en-US/docs/Web/CSS/clip-path
		@see http://caniuse.com/#search=clip-path
		@author Yvain Liechti
		@see https://twitter.com/ryuran78/status/778943389819604992
	* 3.
		@note preventing text to be condensed
		author J. Renée Beach
		@see https://medium.com/@jessebeach/beware-smushed-off-screen-accessible-text-5952a4c2cbfe
		@note Drupal 8 goes with word-wrap: normal instead
		@see https://www.drupal.org/node/2045151
		@see http://cgit.drupalcode.org/drupal/commit/?id=5b847ea
	* 4.
		@note !important is important
		@note Obviously you wanna hide something
		@author Harry Roberts
		@see http://csswizardry.com/2016/05/the-importance-of-important/
*/

.sr-only {
	border: 0 !important;
	clip: rect(1px, 1px, 1px, 1px) !important; /* 1 */
	-webkit-clip-path: inset(50%) !important;
		clip-path: inset(50%) !important;  /* 2 */
	height: 1px !important;
	overflow: hidden !important;
	padding: 0 !important;
	position: absolute !important;
	width: 1px !important;
	white-space: nowrap !important;            /* 3 */
}

/*
	Use in conjunction with .sr-only to only display content when it's focused.
	@note Useful for skip links 
	@see http://www.w3.org/TR/2013/NOTE-WCAG20-TECHS-20130905/G1
	@note Based on a HTML5 Boilerplate technique, included in Bootstrap
	@note Fixed a bug with position: static on iOS 10.0.2 + VoiceOver
		@author Sylvain Pigeard
		@see https://github.com/twbs/bootstrap/issues/20732
*/
.sr-only-focusable:focus,
.sr-only-focusable:active {
	clip: auto !important;
	-webkit-clip-path: none !important;
		clip-path: none !important;
	height: auto !important;
	overflow: visible !important;
	width: auto !important;
	white-space: normal !important;
}

<button type="button">
	<span aria-hidden="true">&times;</span>
	<span class="sr-only">Close</span>
</button>

<a href="/" class="sr-only sr-only-focusable">Skippy</a>

<div dir="rtl">
	<button type="button">
		<span aria-hidden="true">&times;</span>
		<span class="sr-only">Close</span>
	</button>

	<a href="ffoodd.fr" class="sr-only sr-only-focusable">ffoodd.fr</a>
</div>