06 — E-Ink CSS Design

Rendering constraints for the Kindle Experimental Browser and design principles for e-ink-optimized HTML.

Kindle Browser Constraints

PW5 Experimental Browser

• WebKit-based (similar to Safari ~2018 era)
• No Service Workers
• Limited localStorage (~5 MB)
• No WebGL, limited Canvas
• JavaScript: basic support, no ES2020+ features
• No CSS Grid (use Flexbox or simple layouts)
• Limited @media query support
• Viewport: 1236 x 1648 pixels (300 PPI), but effective CSS viewport is smaller
• No hover states (touch-only)
• Slow page turns / refreshes