javascript - 按月对对象数组进行排序

Question

我正在使用仪表板，我有一个图表，我必须在其中根据月份标签显示计数。我有一组带有计数和月份键的对象。我想按月键值的升序对这个对象数组进行排序。我试过下面的代码在 chrome 中工作正常，但数组在 Firefox 中确实得到排序。

var xAxis =  [
{count: 0, month: "Jan 2019"},
{count: 7, month: "Dec 2019"},
{count: 0, month: "Feb 2019"},
{count: 0, month: "Jul 2019"}
] 

 xAxis.sort(function(a, b) {
  var c = new Date(a.month);
  console.log("TCL: CountByUserGraph -> makeApiCall -> c", c)
  // Chrome showing  ==> Tue Jan 01 2019 00:00:00 GMT+0530 
  //firefox showing  ==> Invalid Date
  var d = new Date(b.month);
  return c - d;
});

Answer 1

以下实现比较年和月 -

const sortByMonth = arr => {
  const months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
  const getIndexOfMonth = month => months.indexOf(month)
  return [ ...arr ].sort((left, right) => {
    const [ leftMonth, leftYear ] = left.month.split(' ')
    const [ rightMonth, rightYear ] = right.month.split(' ')
    if (leftYear !== rightYear) {
      return parseInt(leftYear) - parseInt(rightYear)
    }
    return getIndexOfMonth(leftMonth) - getIndexOfMonth(rightMonth)
  })
}

var xAxis =  [
  {count: 0, month: "Jan 2019"},
  {count: 7, month: "Dec 2019"},
  {count: 0, month: "Dec 2017"},
  {count: 0, month: "Jun 2018"},
  {count: 0, month: "Feb 2019"},
  {count: 0, month: "Jul 2019"},
];

console.log(sortByMonth(xAxis))