如何找到字符串数组中的最小元素，但只考虑整数？

function findMinInteger(arr) {
  var integers = [];
  for (var i = 0; i < arr.length; i++) {
    if (!isNaN(parseInt(arr[i]))) {
      integers.push(parseInt(arr[i]));
    }
  }
  var min = integers[0];
  for (var j = 1; j < integers.length; j++) {
    if (integers[j] < min) {
      min = integers[j];
    }
  }
  return min;
}

var arr = ["abc", "123", "45", "xyz", "789"];
var minInteger = findMinInteger(arr);
console.log("最小整数为：" + minInteger);