Make Two Arrays Equal by Reversing Sub-arrays LeetCode solution in JavaScript

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var canBeEqual = function (target, arr) {
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  if (arr.length == 1) {
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    if (arr[0] === target[0]) {
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      return true;
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    }
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  }
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  let obj = {};
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  for (let i = 0; i < arr.length; i++) {
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    if (obj[arr[i]] == undefined) {
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      obj[arr[i]] = 1;
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    } else {
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      obj[arr[i]]++;
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    }
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  }
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  for (let i = 0; i < target.length; i++) {
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    if (obj[target[i]] == undefined) {
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      return false;
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    } else {
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      obj[target[i]]++;
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    }
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  }
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  let result = Object.values(obj);
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  for (let i = 0; i < result.length; i++) {
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    if (result[i] % 2 !== 0) {
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      return false;
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    }
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  }
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  return true;
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};