查找数组中最长的字符串

function findLongestString(arr) {
  let longestString = "";
  for (let i = 0; i < arr.length; i++) {
    if (typeof arr[i] === "string" && arr[i].length > longestString.length) {
      longestString = arr[i];
    }
  }
  return longestString;
}

const array = ["apple", "banana", "orange", "watermelon"];
const longestString = findLongestString(array);
console.log("The longest string in the array is: " + longestString);