1 files changed, 33 insertions, 0 deletions
diff --git a/themes/twentynineteen/js/skip-link-focus-fix.js b/themes/twentynineteen/js/skip-link-focus-fix.js
new file mode 100644
index 00000000..32ba80cc
--- /dev/null
+++ b/themes/twentynineteen/js/skip-link-focus-fix.js
@@ -0,0 +1,33 @@
+/**
+ * File skip-link-focus-fix.js.
+ *
+ * Helps with accessibility for keyboard only users.
+ *
+ * This is the source file for what is minified in the twentynineteen_skip_link_focus_fix() PHP function.
+ *
+ * Learn more: https://git.io/vWdr2
+ */
+( function() {
+	var isIe = /(trident|msie)/i.test( navigator.userAgent );
+
+	if ( 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 );
+	}
+} )();