getContext method
Object getContext(Source
Object getContext(String contextId, [Map attributes]) {
  if (attributes != null) {
    return _blink.BlinkHTMLCanvasElement.instance.getContext_Callback_2_(
        this, contextId, convertDartToNative_Dictionary(attributes));
  }
  return _blink.BlinkHTMLCanvasElement.instance
      .getContext_Callback_1_(this, contextId);
}
    © 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
    https://api.dartlang.org/stable/1.24.3/dart-html/CanvasElement/getContext.html