```javascript function bubbleSort(arr) { let len = arr.length; for (let i = 0; i < len - 1; i++) { for (let j = 0; j < len - 1 - i; j++) { if (arr[j] > arr[j + 1]) { let temp = arr[j]; arr[j] = arr[j + 1]; arr[j + 1] = temp; } } } return arr; } // 示例 const arr = [3, 2, 5, 1, 4]; console.log(bubbleSort(arr)); // 输出：[1, 2, 3, 4, 5] ```