javascript - Discord 如何格式化今天和昨天的日期？

Question

我目前正在研究基于网站不和谐的东西，我希望能够整合他们的日期格式。
我在说什么？
我正在谈论这个:UserOne Yesterday at 17:03UserTwo Today at 13:06例子:

Answer 1

你可以在下面找到一个快速而肮脏的解决方案，尽管我可能会使用 date-fns 为了这。逻辑也一样。检查这一天是今天还是昨天。如果是，打印单词和时间。如果不是，则只打印日期:

function isSameDay(date1, date2) {
  return (date1.getDate() === date2.getDate() &&
    date1.getMonth() === date2.getMonth() &&
    date1.getFullYear() === date2.getFullYear())
}

function formatDate(d) {
  const today = new Date()
  const yesterday = new Date(today)
  yesterday.setDate(yesterday.getDate() - 1)
  const timeOptions = {
    hour: '2-digit',
    minute: '2-digit'
  }

  if (isSameDay(d, today)) {
    // it's today
    return `Today at ${d.toLocaleTimeString(undefined, timeOptions)}`
  }

  if (isSameDay(d, yesterday)) {
    // it was yesterday
    return `Yesterday at ${d.toLocaleTimeString(undefined, timeOptions)}`
  }

  return d.toLocaleDateString()
}

// examples
console.log({
  'Now': formatDate(new Date()),
  // geez, this yesterday date is ugly :D
  'Yesterday': formatDate(new Date(new Date().setDate(new Date().getDate() - 1))),
  'On the 5th of January': formatDate(new Date('2021-01-05 11:54'))
})

与 date-fns :

const format = require('date-fns/format');
const isToday = require('date-fns/isToday');
const isYesterday = require('date-fns/isYesterday');

function formatDate(d) {
  if (isToday(d)) {
    return `Today at ${format(d, 'kk:mm')}`;
  }

  if (isYesterday(d)) {
    return `Yesterday at ${format(d, 'kk:mm')}`;
  }

  return format(d, 'dd/MM/yyyy');
}