Find a Corresponding Node of a Binary Tree in a Clone of That Tree LeetCode solution in JavaScript

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var getTargetCopy = function (original, cloned, target) {
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  if (original == null) {
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    // Base case aka stop condition
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    // empty tree or empty node
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    return null;
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  }
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  // General cases
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  if (original == target) {
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    // current original node is target, so is cloned
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    return cloned;
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  }
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  // Either left subtree has target, or right subtree has target
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  return (
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    getTargetCopy(original.left, cloned.left, target) ||
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    getTargetCopy(original.right, cloned.right, target)
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  );
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};