supportsPointConversions property
convertPointFromNodeToPage and convertPointFromPageToNode are removed. see http://dev.w3.org/csswg/cssom-view/#geometry
Implementation
static bool get supportsPointConversions => DomPoint.supported;© 2012 the Dart project authors
Licensed under the BSD 3-Clause "New" or "Revised" License.
https://api.dart.dev/stable/2.18.5/dart-html/Window/supportsPointConversions.html