https://developer.mozilla.org/en-US/docs/Web/API/SVGLength
SVGLength - Web APIs | MDN
web apismdn
https://lists.w3.org/Archives/Public/www-svg/2011Feb/0074.html
Re: Test for animation of SVGLength values from Dr. Olaf Hoffmann on 2011-02-26 (www-svg@w3.org...
https://wasm-bindgen.github.io/wasm-bindgen/api/web_sys/struct.SvgLength.html
SvgLength in web_sys - Rust
The `SvgLength` class.
in websysrust