Whether the engine understands CSS anchor positioning (anchor-name,
position-anchor, position-area, position-try). Baseline since January
2026. When this is false, the auto-loader pulls in the JS positioning
fallback so floating surfaces are still placed against their anchor.
Whether the engine understands CSS anchor positioning (
anchor-name,position-anchor,position-area,position-try). Baseline since January 2026. When this isfalse, the auto-loader pulls in the JS positioning fallback so floating surfaces are still placed against their anchor.