date-format.js
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// yyyy-MM-dd hh:mm:ss.SSS 所有支持的类型
function pad(str, length = 2) {
str += ''
while (str.length < length) {
str = '0' + str
}
return str.slice(-length)
}
const parser = {
yyyy: (dateObj) => {
return pad(dateObj.year, 4)
},
yy: (dateObj) => {
return pad(dateObj.year)
},
MM: (dateObj) => {
return pad(dateObj.month)
},
M: (dateObj) => {
return dateObj.month
},
dd: (dateObj) => {
return pad(dateObj.day)
},
d: (dateObj) => {
return dateObj.day
},
hh: (dateObj) => {
return pad(dateObj.hour)
},
h: (dateObj) => {
return dateObj.hour
},
mm: (dateObj) => {
return pad(dateObj.minute)
},
m: (dateObj) => {
return dateObj.minute
},
ss: (dateObj) => {
return pad(dateObj.second)
},
s: (dateObj) => {
return dateObj.second
},
SSS: (dateObj) => {
return pad(dateObj.millisecond, 3)
},
S: (dateObj) => {
return dateObj.millisecond
},
}
// 这都n年了iOS依然不认识2020-12-12，需要转换为2020/12/12
function getDate(time) {
if (time instanceof Date) {
return time
}
switch (typeof time) {
case 'string':
{
// 2020-12-12T12:12:12.000Z、2020-12-12T12:12:12.000
if (time.indexOf('T') > -1) {
return new Date(time)
}
return new Date(time.replace(/-/g, '/'))
}
default:
return new Date(time)
}
}
export function formatDate(date, format = 'yyyy/MM/dd hh:mm:ss') {
if (!date && date !== 0) {
return ''
}
date = getDate(date)
const dateObj = {
year: date.getFullYear(),
month: date.getMonth() + 1,
day: date.getDate(),
hour: date.getHours(),
minute: date.getMinutes(),
second: date.getSeconds(),
millisecond: date.getMilliseconds()
}
const tokenRegExp = /yyyy|yy|MM|M|dd|d|hh|h|mm|m|ss|s|SSS|SS|S/
let flag = true
let result = format
while (flag) {
flag = false
result = result.replace(tokenRegExp, function(matched) {
flag = true
return parser[matched](dateObj)
})
}
return result
}
export function friendlyDate(time, {
locale = 'zh',
threshold = [60000, 3600000],
format = 'yyyy/MM/dd hh:mm:ss'
}) {
if (time === '-') {
return time
}
if (!time && time !== 0) {
return ''
}
const localeText = {
zh: {
year: '年',
month: '月',
day: '天',
hour: '小时',
minute: '分钟',
second: '秒',
ago: '前',
later: '后',
justNow: '刚刚',
soon: '马上',
template: '{num}{unit}{suffix}'
},
en: {
year: 'year',
month: 'month',
day: 'day',
hour: 'hour',
minute: 'minute',
second: 'second',
ago: 'ago',
later: 'later',
justNow: 'just now',
soon: 'soon',
template: '{num} {unit} {suffix}'
}
}
const text = localeText[locale] || localeText.zh
let date = getDate(time)
let ms = date.getTime() - Date.now()
let absMs = Math.abs(ms)
if (absMs < threshold[0]) {
return ms < 0 ? text.justNow : text.soon
}
if (absMs >= threshold[1]) {
return formatDate(date, format)
}
let num
let unit
let suffix = text.later
if (ms < 0) {
suffix = text.ago
ms = -ms
}
const seconds = Math.floor((ms) / 1000)
const minutes = Math.floor(seconds / 60)
const hours = Math.floor(minutes / 60)
const days = Math.floor(hours / 24)
const months = Math.floor(days / 30)
const years = Math.floor(months / 12)
switch (true) {
case years > 0:
num = years
unit = text.year
break
case months > 0:
num = months
unit = text.month
break
case days > 0:
num = days
unit = text.day
break
case hours > 0:
num = hours
unit = text.hour
break
case minutes > 0:
num = minutes
unit = text.minute
break
default:
num = seconds
unit = text.second
break
}
if (locale === 'en') {
if (num === 1) {
num = 'a'
} else {
unit += 's'
}
}
return text.template.replace(/{\s*num\s*}/g, num + '').replace(/{\s*unit\s*}/g, unit).replace(/{\s*suffix\s*}/g,
suffix)
}