| 1 |
var keyboardNavigation = false, |
| 2 |
keyboardNavigationKeycodes = [ 9, 32, 37, 38, 39, 40 ]; // keyCodes for tab, space, left, up, right, down respectively |
| 3 |
|
| 4 |
document.addEventListener( 'keydown', function( event ) { |
| 5 |
if ( keyboardNavigation ) { |
| 6 |
return; |
| 7 |
} |
| 8 |
if ( keyboardNavigationKeycodes.indexOf( event.keyCode ) !== -1 ) { |
| 9 |
keyboardNavigation = true; |
| 10 |
document.documentElement.classList.add( 'accessible-focus' ); |
| 11 |
} |
| 12 |
} ); |
| 13 |
document.addEventListener( 'mouseup', function() { |
| 14 |
if ( ! keyboardNavigation ) { |
| 15 |
return; |
| 16 |
} |
| 17 |
keyboardNavigation = false; |
| 18 |
document.documentElement.classList.remove( 'accessible-focus' ); |
| 19 |
} ); |
| 20 |
|
