In which situation would "focus trap" be an issue?

A focus trap occurs in user interfaces, particularly in modal dialogs, where keyboard navigation is limited to a specific area or component, preventing users from moving to other parts of the webpage. This issue is significant for accessibility because it can hinder users who rely on keyboard navigation, such as those with visual impairments or mobility disabilities.

In the case of a modal dialog opening, if the focus trap is implemented incorrectly or not at all, users may be unable to move focus outside of the modal, effectively locking them into that section of the interface until it is closed. This can create confusion and frustration, as users may get trapped without knowing how to exit the modal, leading to a poor user experience.

In contrast, scenarios involving inaccessible help menus, excessive hyperlinks, or being directed to external sites do not inherently relate to the concept of a focus trap, as these issues deal more with navigation accessibility or content accessibility rather than the specific contextual limitations of keyboard focus within a confined space. Understanding focus traps is vital for creating inclusive and accessible web experiences, ensuring that all users have the ability to navigate freely and efficiently.