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Published: September 7, 2026
A modal is not merely a centered card. It temporarily changes the reading and interaction context, so its entry, focus, dismissal, and return behavior all belong in the design acceptance record.
Confirm a dialog is warranted
Use a modal for a contained decision or task that benefits from keeping the underlying context. Prefer an ordinary page when the content is long, linkable, or likely to involve several steps. Avoid stacking dialogs.
Specify opening and closing behavior
Name the trigger, initial focus target, title, description, available actions, and every permitted dismissal method. When it closes, focus should normally return to the control that opened it. Destructive choices need clear wording and a safe cancellation path.
Test interaction details
- Keyboard focus remains inside while the dialog is active.
- Background content is not operable or announced as active content.
- Escape and close controls follow the approved dismissal rule.
- Zoom and small screens do not hide actions.
- Validation errors remain associated with their fields.
- Interrupted or failed actions explain what was preserved.
Capture the full sequence
Evidence should show the trigger, open state, focus order, error state, completion, and returned focus. Review assistive-technology behavior in the implemented component.
Further reading
Related Articles
Reuse one governed dialog pattern instead of creating page-specific variants.
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