Function dfs

javascript/0199-binary-tree-right-side-view.js:49–54

(root, level, rightSide)

};

const dfs = (root, level, rightSide) => {
    if (root.right) rightSideView(root.right, level + 1, rightSide);
    if (root.left) rightSideView(root.left, level + 1, rightSide);

    return rightSide;
};