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/**
* 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 );
}
} )();