supportsPointConversions 属性
convertPointFromNodeToPage 和 convertPointFromPageToNode 已被移除。请参阅 http://dev.w3.org/csswg/cssom-view/#geometry
实现
static bool get supportsPointConversions => DomPoint.supported;convertPointFromNodeToPage 和 convertPointFromPageToNode 已被移除。请参阅 http://dev.w3.org/csswg/cssom-view/#geometry
static bool get supportsPointConversions => DomPoint.supported;