https://developer.mozilla.org/en-US/docs/Web/API/CSSNumericValue/type
CSSNumericValue: type() method - Web APIs | MDN
The type() method of the CSSNumericValue interface returns the type of CSSNumericValue, one of angle, flex, frequency, length, resolution, percent,...
web apiscssnumericvaluetypemethodmdn
https://api.dart.dev/dart-html/CssNumericValue/parse.html
parse method - CssNumericValue class - dart:html library - Dart API
API docs for the parse method from the CssNumericValue class, for the Dart programming language.
parsemethodcssnumericvalueclassdart