const hasPathToSum = function(node, targetSum) {
  var wasFound = false;
  var getBranchSum = function(node, sum = 0) {
    sum += node.value;
    if (node.left) {
      getBranchSum(node.left, sum);
    }
    if (node.right) {
      getBranchSum(node.right, sum);
    }
    if (!node.left && !node.right) {
      if (sum === targetSum) {
        wasFound = true;
      }
    }
  };
  getBranchSum(node);
  return wasFound;
};

const hasPathToSum = function(node, targetSum) {
  var allBranchSums = [];
  var getBranchSum = (node, sum=0) => {
    sum += node.value;
    if (node.left) {
      getBranchSum(node.left, sum);
    }
    if (node.right) {
      getBranchSum(node.right, sum);
    }
    if (!node.left && !node.right) {
      allBranchSums.push(sum);
    }
  };
  getBranchSum(node);
  return allBranchSums.includes(targetSum);
};