JS—如何按日期對象數組進行排序，然后按時間順序進行降序排序？

排序在項目中還是比較常見的。特別后台·管理系統，動不動就有升序降序的排序操作

1. 有以下數組

// 如何對數組進行排序，從最早到最新，反之亦然？

const arr = [
  {id: 1, value : "value1", date: "2018-08-08", time: "15:27:17"},
  {id: 2, value : "value2", date: "2018-08-09", time: "12:27:17"},
  {id: 3, value : "value3", date: "2018-08-10", time: "17:27:17"},
  {id: 4, value : "value4", date: "2018-08-10", time: "01:27:17"},
  {id: 5, value : "value5", date: "2018-08-10", time: "09:27:17"},
  {id: 6, value : "value6", date: "2018-08-10", time: "23:27:17"},
  {id: 7, value : "value7", date: "2018-08-10", time: "16:27:17"},
  {id: 8, value : "value8", date: "2018-08-11", time: "10:27:17"}
];

arr.sort((a, b) => a.date.localeCompare(b.date) || a.time.localeCompare(b.time));
console.log(arr);

這是在控制台上輸出的結果：

2. 若要排序為降序，只需切換as和bs：

const arr = [
{id: 1, value : "value1", date: "2018-08-08", time: "15:27:17"},
{id: 2, value : "value2", date: "2018-08-09", time: "12:27:17"},
{id: 3, value : "value3", date: "2018-08-10", time: "17:27:17"},
{id: 4, value : "value4", date: "2018-08-10", time: "01:27:17"},
{id: 5, value : "value5", date: "2018-08-10", time: "09:27:17"},
{id: 6, value : "value6", date: "2018-08-10", time: "23:27:17"},
{id: 7, value : "value7", date: "2018-08-10", time: "16:27:17"},
{id: 8, value : "value8", date: "2018-08-11", time: "10:27:17"}
];

arr.sort((a, b) => b.date.localeCompare(a.date) || b.time.localeCompare(a.time));
console.log(arr);

這是在控制台上輸出的結果，如果圖片無法顯示，復制代碼到控制台輸出即可觀察到變化