字符串驼峰和日期格式化

const camelizeRE = /-(\w)/g
export function camelize (str) {
str = String(str)
return str.replace(camelizeRE, function (m, c) {
return c ? c.toUpperCase() : ''
})
}

export function kebab (str) {
str = String(str)
return str.replace(/([A-Z])/g, '-$1').toLowerCase()
}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
const DAY_TIMESTAMP = 60 * 60 * 24 * 1000
const HOUR_TIMESTAMP = 60 * 60 * 1000
const MINUTE_TIMESTAMP = 60 * 1000

function formatType(type, format, value, regExpAttributes) {
const regExpMap = {
year: '(Y+)',
month: '(M+)',
date: '(D+)',
hour: '(h+)',
minute: '(m+)',
second: '(s+)',
quarter: '(q+)',
millisecond: '(S)'
}

if (new RegExp(regExpMap[type], regExpAttributes).test(format)) {
const replaceStr = type === 'year'
? value.toString().substr(4 - RegExp.$1.length)
: (RegExp.$1.length === 1) ? value : pad(value)
format = format.replace(RegExp.$1, replaceStr)
}

return format
}

function pad(value) {
return ('00' + value).substr(('' + value).length)
}

function formatDate(date, format) {
const map = {
year: {
value: date.getFullYear(),
regExpAttributes: 'i'
},
month: {
value: date.getMonth() + 1
},
date: {
value: date.getDate(),
regExpAttributes: 'i'
},
hour: {
value: date.getHours(),
regExpAttributes: 'i'
},
minute: {
value: date.getMinutes()
},
second: {
value: date.getSeconds()
},
quarter: {
value: Math.floor((date.getMonth() + 3) / 3),
regExpAttributes: 'i'
},
millisecond: {
value: date.getMilliseconds()
}
}

for (const key in map) {
format = formatType(key, format, map[key].value, map[key].regExpAttributes)
}

return format
}

function getZeroStamp(date) {
const year = date.getFullYear()
const month = date.getMonth() + 1
const day = date.getDate()
return +new Date(year + '/' + month + '/' + day + ' 00:00:00')
}

function getDayDiff(date1, date2) {
return Math.floor((getZeroStamp(date1) - getZeroStamp(date2)) / DAY_TIMESTAMP)
}

function getNow() {
return window.performance && window.performance.now ? (window.performance.now() + window.performance.timing.navigationStart) : +new Date()
}

function computeNatureMaxDay(month, year) {
let natureMaxDay = 30
if ([1, 3, 5, 7, 8, 10, 12].indexOf(month) > -1) {
natureMaxDay = 31
} else {
if (month === 2) {
natureMaxDay = !year || (!(year % 400) || (!(year % 4) && year % 100)) ? 29 : 28
}
}

return natureMaxDay
}

export {
DAY_TIMESTAMP,
HOUR_TIMESTAMP,
MINUTE_TIMESTAMP,
pad,
formatType,
formatDate,
getZeroStamp,
getDayDiff,
getNow,
computeNatureMaxDay
}
posted @ 2019-04-23 14:25  刘浩2561179983  阅读(257)  评论(0)  编辑  收藏  举报