diff --git a/_rules/aria-hidden-no-focusable-content-6cfa84.md b/_rules/aria-hidden-no-focusable-content-6cfa84.md index 92e3df5a97e..fe8832a0422 100755 --- a/_rules/aria-hidden-no-focusable-content-6cfa84.md +++ b/_rules/aria-hidden-no-focusable-content-6cfa84.md @@ -97,13 +97,28 @@ This `input` element is not part of the [sequential focus navigation][] because #### Passed Example 4 -This `a` element is part of the [sequential focus navigation][], but moves focus to the `input` element whenever it receives focus. +This `a` element is not [focusable][] because it moves focus to the `input` element whenever it receives focus. These elements +are sometimes referred to as 'focus sentinel' or 'bumper'. They are typically found before and after a modal / dialog in +order to contain focus within the modal. Page authors do not want the sentinel to be visible, nor do they want them to be read by +a screen reader. But, they do want the element to be part of the [sequential focus navigation][]. This allows the page author +to detect that focus has left the dialog in order to wrap it to the top/bottom as appropriate. ```html +