32 lines
685 B
JavaScript
32 lines
685 B
JavaScript
|
/**
|
||
|
|
* File skip-link-focus-fix.js.
|
||
|
|
*
|
||
|
|
* Helps with accessibility for keyboard only users.
|
||
|
|
*
|
||
|
|
* 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 );
|
||
|
|
}
|
||
|
|
} )();
|