1.4 KiB
1.4 KiB
Purpose
TBD
Requirements
Requirement: User can switch between light and dark themes
The system SHALL allow the user to toggle between light and dark themes with a persistent preference.
Scenario: User toggles dark mode on
- WHEN the user activates the theme toggle while the app is in light mode
- THEN the system applies the dark theme and saves the preference for future visits
Scenario: User toggles dark mode off
- WHEN the user activates the theme toggle while the app is in dark mode
- THEN the system applies the light theme and saves the preference for future visits
Requirement: Theme preference respects system defaults on first visit
The system SHALL use the user's system color scheme preference when no saved preference exists.
Scenario: No stored preference uses system theme
- WHEN the user opens the app for the first time without a saved theme preference
- THEN the system applies dark mode when the operating system prefers dark color schemes and light mode otherwise
Requirement: Theme selection loads without a flash of the wrong theme
The system SHALL initialize the theme before the first visible paint so the page does not briefly render in the wrong theme.
Scenario: Initial paint matches saved theme
- WHEN the app loads and a saved theme preference exists
- THEN the document theme is applied before the page content is visibly rendered