从js中的两个数组中删除重复的哈希？

function removeDuplicateHash(arr1, arr2) {
  var uniqueHashes = [];

  // 处理第一个数组
  for (var i = 0; i < arr1.length; i++) {
    if (!uniqueHashes.includes(arr1[i])) {
      uniqueHashes.push(arr1[i]);
    }
  }

  // 处理第二个数组
  for (var j = 0; j < arr2.length; j++) {
    if (!uniqueHashes.includes(arr2[j])) {
      uniqueHashes.push(arr2[j]);
    }
  }

  return uniqueHashes;
}

var array1 = ['hash1', 'hash2', 'hash3'];
var array2 = ['hash2', 'hash3', 'hash4'];

var uniqueHashes = removeDuplicateHash(array1, array2);
console.log(uniqueHashes);