Copy for testing: Blogger Contempo Light Theme: Light/Dark Mode Prototype and Implementation Approach
This is a copy made on 1 Nov. 2025 of a post from another blog of mine for testing. Last updated on 31 Oct. 2025 Quick Info Demo blog: Contempo Theme Toggle Light/Dark Test/Demo . In the blog, the Appearance Mode menu item — available from the top-left navigation menu dropdown (three horizontal bars) on smaller screens, or the side panel on large screens — opens a modal dialog that allows users to: Select the appearance mode — Light, Dark, or Device (System Default). Choose whether to show or hide the floating button for appearance mode, which appears at the bottom-right corner of the blog window. For first-time visitors (who have not yet used the above dialog to set their preferences): When the window width is large (≥ 800 px), the floating button for appearance mode is shown in the bottom-right corner. When the window width is small (for example, mobile portrait view), the floating button is not shown by default. This UI design choice avoids i...