From 00c9709fd9763542e848f6278db8ba26af5c9886 Mon Sep 17 00:00:00 2001
From: Max
Date: Mon, 15 Oct 2018 23:46:42 +0200
Subject: Initial commit.

---
 src/js/skip-link-focus-fix.js | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 src/js/skip-link-focus-fix.js

(limited to 'src/js/skip-link-focus-fix.js')

diff --git a/src/js/skip-link-focus-fix.js b/src/js/skip-link-focus-fix.js
new file mode 100644
index 0000000..a39cefb
--- /dev/null
+++ b/src/js/skip-link-focus-fix.js
@@ -0,0 +1,33 @@
+/**
+ * File skip-link-focus-fix.js.
+ *
+ * Helps with accessibility for keyboard only users.
+ *
+ * Learn more: https://git.io/vWdr2
+ */
+( function() {
+	var isWebkit = navigator.userAgent.toLowerCase().indexOf( 'webkit' ) > -1,
+	    isOpera  = navigator.userAgent.toLowerCase().indexOf( 'opera' )  > -1,
+	    isIe     = navigator.userAgent.toLowerCase().indexOf( 'msie' )   > -1;
+
+	if ( ( isWebkit || isOpera || isIe ) && document.getElementById && window.addEventListener ) {
+		window.addEventListener( 'hashchange', function() {
+			var id = location.hash.substring( 1 ),
+				element;
+
+			if ( ! ( /^[A-z0-9_-]+$/.test( id ) ) ) {
+				return;
+			}
+
+			element = document.getElementById( id );
+
+			if ( element ) {
+				if ( ! ( /^(?:a|select|input|button|textarea)$/i.test( element.tagName ) ) ) {
+					element.tabIndex = -1;
+				}
+
+				element.focus();
+			}
+		}, false );
+	}
+})();
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