【JavaScript】 phpのdate関数風の日付整形処理
Category JavaScript
2017/06/10
問題
php の date('Y年m月d日', タイムスタンプ); のような感じで、
JavaScriptで日付の整形処理ありませんか。
答え
世間で需要がありそうなコードは、たいてい誰かが作っていて、gitHubにあることが多い。
こちらがちょうどよいでしょう。
https://github.com/kvz/locutus/blob/master/src/php/datetime/date.js
以下のように書かれているので、
module.exports = function date (format, timestamp) {
～～～
}
単体の関数として使用したいときは、少しアレンジするとよいでしょう、
function date_format (format, timestamp) {
～～～
}
デモ
ソース
関数定義部分のみ。GitHubから取得したプログラムを一部変更したもの。
//module.exports = function date (format, timestamp) {
function date_format (format, timestamp) {
// discuss at: http://locutus.io/php/date/
// original by: Carlos R. L. Rodrigues (http://www.jsfromhell.com)
// original by: gettimeofday
// parts by: Peter-Paul Koch (http://www.quirksmode.org/js/beat.html)
// improved by: Kevin van Zonneveld (http://kvz.io)
// improved by: MeEtc (http://yass.meetcweb.com)
// improved by: Brad Touesnard
// improved by: Tim Wiel
// improved by: Bryan Elliott
// improved by: David Randall
// improved by: Theriault (https://github.com/Theriault)
// improved by: Theriault (https://github.com/Theriault)
// improved by: Brett Zamir (http://brett-zamir.me)
// improved by: Theriault (https://github.com/Theriault)
// improved by: Thomas Beaucourt (http://www.webapp.fr)
// improved by: JT
// improved by: Theriault (https://github.com/Theriault)
// improved by: Rafał Kukawski (http://blog.kukawski.pl)
// improved by: Theriault (https://github.com/Theriault)
// input by: Brett Zamir (http://brett-zamir.me)
// input by: majak
// input by: Alex
// input by: Martin
// input by: Alex Wilson
// input by: Haravikk
// bugfixed by: Kevin van Zonneveld (http://kvz.io)
// bugfixed by: majak
// bugfixed by: Kevin van Zonneveld (http://kvz.io)
// bugfixed by: Brett Zamir (http://brett-zamir.me)
// bugfixed by: omid (http://locutus.io/php/380:380#comment_137122)
// bugfixed by: Chris (http://www.devotis.nl/)
// note 1: Uses global: locutus to store the default timezone
// note 1: Although the function potentially allows timezone info
// note 1: (see notes), it currently does not set
// note 1: per a timezone specified by date_default_timezone_set(). Implementers might use
// note 1: $locutus.currentTimezoneOffset and
// note 1: $locutus.currentTimezoneDST set by that function
// note 1: in order to adjust the dates in this function
// note 1: (or our other date functions!) accordingly
// example 1: date('H:m:s \\m \\i\\s \\m\\o\\n\\t\\h', 1062402400)
// returns 1: '07:09:40 m is month'
// example 2: date('F j, Y, g:i a', 1062462400)
// returns 2: 'September 2, 2003, 12:26 am'
// example 3: date('Y W o', 1062462400)
// returns 3: '2003 36 2003'
// example 4: var $x = date('Y m d', (new Date()).getTime() / 1000)
// example 4: $x = $x + ''
// example 4: var $result = $x.length // 2009 01 09
// returns 4: 10
// example 5: date('W', 1104534000)
// returns 5: '52'
// example 6: date('B t', 1104534000)
// returns 6: '999 31'
// example 7: date('W U', 1293750000.82); // 2010-12-31
// returns 7: '52 1293750000'
// example 8: date('W', 1293836400); // 2011-01-01
// returns 8: '52'
// example 9: date('W Y-m-d', 1293974054); // 2011-01-02
// returns 9: '52 2011-01-02'
// test: skip-1 skip-2 skip-5
var jsdate, f
// Keep this here (works, but for code commented-out below for file size reasons)
// var tal= [];
var txtWords = [
'Sun', 'Mon', 'Tues', 'Wednes', 'Thurs', 'Fri', 'Satur',
'January', 'February', 'March', 'April', 'May', 'June',
'July', 'August', 'September', 'October', 'November', 'December'
]
// trailing backslash -> (dropped)
// a backslash followed by any character (including backslash) -> the character
// empty string -> empty string
var formatChr = /\\?(.?)/gi
var formatChrCb = function (t, s) {
return f[t] ? f[t]() : s
}
var _pad = function (n, c) {
n = String(n)
while (n.length < c) {
n = '0' + n
}
return n
}
f = {
// Day
d: function () {
// Day of month w/leading 0; 01..31
return _pad(f.j(), 2)
},
D: function () {
// Shorthand day name; Mon...Sun
return f.l()
.slice(0, 3)
},
j: function () {
// Day of month; 1..31
return jsdate.getDate()
},
l: function () {
// Full day name; Monday...Sunday
return txtWords[f.w()] + 'day'
},
N: function () {
// ISO-8601 day of week; 1[Mon]..7[Sun]
return f.w() || 7
},
S: function () {
// Ordinal suffix for day of month; st, nd, rd, th
var j = f.j()
var i = j % 10
if (i <= 3 && parseInt((j % 100) / 10, 10) === 1) {
i = 0
}
return ['st', 'nd', 'rd'][i - 1] || 'th'
},
w: function () {
// Day of week; 0[Sun]..6[Sat]
return jsdate.getDay()
},
z: function () {
// Day of year; 0..365
var a = new Date(f.Y(), f.n() - 1, f.j())
var b = new Date(f.Y(), 0, 1)
return Math.round((a - b) / 864e5)
},
// Week
W: function () {
// ISO-8601 week number
var a = new Date(f.Y(), f.n() - 1, f.j() - f.N() + 3)
var b = new Date(a.getFullYear(), 0, 4)
return _pad(1 + Math.round((a - b) / 864e5 / 7), 2)
},
// Month
F: function () {
// Full month name; January...December
return txtWords[6 + f.n()]
},
m: function () {
// Month w/leading 0; 01...12
return _pad(f.n(), 2)
},
M: function () {
// Shorthand month name; Jan...Dec
return f.F()
.slice(0, 3)
},
n: function () {
// Month; 1...12
return jsdate.getMonth() + 1
},
t: function () {
// Days in month; 28...31
return (new Date(f.Y(), f.n(), 0))
.getDate()
},
// Year
L: function () {
// Is leap year?; 0 or 1
var j = f.Y()
return j % 4 === 0 & j % 100 !== 0 | j % 400 === 0
},
o: function () {
// ISO-8601 year
var n = f.n()
var W = f.W()
var Y = f.Y()
return Y + (n === 12 && W < 9 ? 1 : n === 1 && W > 9 ? -1 : 0)
},
Y: function () {
// Full year; e.g. 1980...2010
return jsdate.getFullYear()
},
y: function () {
// Last two digits of year; 00...99
return f.Y()
.toString()
.slice(-2)
},
// Time
a: function () {
// am or pm
return jsdate.getHours() > 11 ? 'pm' : 'am'
},
A: function () {
// AM or PM
return f.a()
.toUpperCase()
},
B: function () {
// Swatch Internet time; 000..999
var H = jsdate.getUTCHours() * 36e2
// Hours
var i = jsdate.getUTCMinutes() * 60
// Minutes
// Seconds
var s = jsdate.getUTCSeconds()
return _pad(Math.floor((H + i + s + 36e2) / 86.4) % 1e3, 3)
},
g: function () {
// 12-Hours; 1..12
return f.G() % 12 || 12
},
G: function () {
// 24-Hours; 0..23
return jsdate.getHours()
},
h: function () {
// 12-Hours w/leading 0; 01..12
return _pad(f.g(), 2)
},
H: function () {
// 24-Hours w/leading 0; 00..23
return _pad(f.G(), 2)
},
i: function () {
// Minutes w/leading 0; 00..59
return _pad(jsdate.getMinutes(), 2)
},
s: function () {
// Seconds w/leading 0; 00..59
return _pad(jsdate.getSeconds(), 2)
},
u: function () {
// Microseconds; 000000-999000
return _pad(jsdate.getMilliseconds() * 1000, 6)
},
// Timezone
e: function () {
// Timezone identifier; e.g. Atlantic/Azores, ...
// The following works, but requires inclusion of the very large
// timezone_abbreviations_list() function.
/* return that.date_default_timezone_get();
*/
var msg = 'Not supported (see source code of date() for timezone on how to add support)'
throw new Error(msg)
},
I: function () {
// DST observed?; 0 or 1
// Compares Jan 1 minus Jan 1 UTC to Jul 1 minus Jul 1 UTC.
// If they are not equal, then DST is observed.
var a = new Date(f.Y(), 0)
// Jan 1
var c = Date.UTC(f.Y(), 0)
// Jan 1 UTC
var b = new Date(f.Y(), 6)
// Jul 1
// Jul 1 UTC
var d = Date.UTC(f.Y(), 6)
return ((a - c) !== (b - d)) ? 1 : 0
},
O: function () {
// Difference to GMT in hour format; e.g. +0200
var tzo = jsdate.getTimezoneOffset()
var a = Math.abs(tzo)
return (tzo > 0 ? '-' : '+') + _pad(Math.floor(a / 60) * 100 + a % 60, 4)
},
P: function () {
// Difference to GMT w/colon; e.g. +02:00
var O = f.O()
return (O.substr(0, 3) + ':' + O.substr(3, 2))
},
T: function () {
// The following works, but requires inclusion of the very
// large timezone_abbreviations_list() function.
/* var abbr, i, os, _default;
if (!tal.length) {
tal = that.timezone_abbreviations_list();
}
if ($locutus && $locutus.default_timezone) {
_default = $locutus.default_timezone;
for (abbr in tal) {
for (i = 0; i < tal[abbr].length; i++) {
if (tal[abbr][i].timezone_id === _default) {
return abbr.toUpperCase();
}
}
}
}
for (abbr in tal) {
for (i = 0; i < tal[abbr].length; i++) {
os = -jsdate.getTimezoneOffset() * 60;
if (tal[abbr][i].offset === os) {
return abbr.toUpperCase();
}
}
}
*/
return 'UTC'
},
Z: function () {
// Timezone offset in seconds (-43200...50400)
return -jsdate.getTimezoneOffset() * 60
},
// Full Date/Time
c: function () {
// ISO-8601 date.
return 'Y-m-d\\TH:i:sP'.replace(formatChr, formatChrCb)
},
r: function () {
// RFC 2822
return 'D, d M Y H:i:s O'.replace(formatChr, formatChrCb)
},
U: function () {
// Seconds since UNIX epoch
return jsdate / 1000 | 0
}
}
var _date = function (format, timestamp) {
jsdate = (timestamp === undefined ? new Date() // Not provided
: (timestamp instanceof Date) ? new Date(timestamp) // JS Date()
: new Date(timestamp * 1000) // UNIX timestamp (auto-convert to int)
)
return format.replace(formatChr, formatChrCb)
}
return _date(format, timestamp)
}
デモを試したら
> NaN年NaN月NaN日 NaN時NaN分NaN秒
という結果が出ましたよ。
IEで「NaN年NaN月NaN日 NaN時NaN分NaN秒」になりますね、