Tiny version
Specification link: Appendix A The SVG Micro DOM (uDOM)
udom-traitaccess-206-t ← index → animate-elem-02-t
Test on Ecma-script. Sets viewport-fill-opacity to 0.5 with setFloatTrait (should show a red viewport with correct opacity, and the text 'viewport-fill-opacity="0.5"' should show).