Get the Root Node in hierarchy

[Khachatur]

Hi,
How can I get the root node (Canvas in my case) in a best way?

[PZsolt27]

var rootNode = cc.find(“Canvas”);

[shishir451]

Also

1. let canvas = cc.game.canvas;
   Or
2. let canvas = cc.director.getScene().getChildByName(“Canvas”);

1st way is most efficient out of all.