2331. Evaluate Boolean Binary Tree

var evaluateTree = function(root) {
    if (root === null) return false
    if (root.val === 0) return false
    if (root.val === 1) return true

    let left = evaluateTree(root.left)
    let right = evaluateTree(root.right)

    return root.val === 2 ? left || right : left && right
};