JavaScriptの新しい日付序数（st、nd、rd、th）
可能であれば、JavaScriptライブラリや大量の不格好なコードなしで、2週間後の日付を次の形式でフォーマットする最も簡単な方法を探しています。
13th March 2013
私が使用しているコードは次のとおりです。
var newdate = new Date(+new Date + 12096e5);
document.body.innerHTML = newdate;
これは、2週間後の日付と時刻を返しますが、次のようになります：Wed Mar 27 2013 21:50:29 GMT + 0000（GMT Standard Time）
jsFiddle のコードは次のとおりです。
助けていただければ幸いです！
ここに：
var fortnightAway = new Date(+new Date + 12096e5),
date = fortnightAway.getDate(),
month = ["January","February","March","April","May","June","July",
"August","September","October","November","December"][fortnightAway.getMonth()];
function nth(d) {
if (d > 3 && d < 21) return 'th';
switch (d % 10) {
case 1: return "st";
case 2: return "nd";
case 3: return "rd";
default: return "th";
}
}
document.body.innerHTML = date + nth(date) + " " +
month + " " +
fortnightAway.getFullYear();他の回答に触発されたライナーがあります。テストされ、0と負の数を取ります。
function getOrdinalNum(n) {
return n + (n > 0 ? ['th', 'st', 'nd', 'rd'][(n > 3 && n < 21) || n % 10 > 3 ? 0 : n % 10] : '');
}
書式設定の答えがたくさんあるので、整数のn番目で作業します。
Number.prototype.nth= function(){
if(this%1) return this;
var s= this%100;
if(s>3 && s<21) return this+'th';
switch(s%10){
case 1: return this+'st';
case 2: return this+'nd';
case 3: return this+'rd';
default: return this+'th';
}
}
私は日付に対してもこれを行っていましたが、月の日は1から31までしかできないため、簡単なソリューションになりました。
function dateOrdinal(dom) {
if (dom == 31 || dom == 21 || dom == 1) return dom + "st";
else if (dom == 22 || dom == 2) return dom + "nd";
else if (dom == 23 || dom == 3) return dom + "rd";
else return dom + "th";
};
または条件演算子を使用したコンパクトバージョン
function dateOrdinal(d) {
return d+(31==d||21==d||1==d?"st":22==d||2==d?"nd":23==d||3==d?"rd":"th")
};
たくさんの答え、ここに別のものがあります：
function addOrd(n) {
var ords = [,'st','nd','rd'];
var ord, m = n%100;
return n + ((m > 10 && m < 14)? 'th' : ords[m%10] || 'th');
}
// Return date string two weeks from now (14 days) in
// format 13th March 2013
function formatDatePlusTwoWeeks(d) {
var months = ['January','February','March','April','May','June',
'July','August','September','October','November','December'];
// Copy date object so don't modify original
var e = new Date(d);
// Add two weeks (14 days)
e.setDate(e.getDate() + 14);
return addOrd(e.getDate()) + ' ' + months[e.getMonth()] + ' ' + e.getFullYear();
}
alert(formatDatePlusTwoWeeks(new Date(2013,2,13))); // 27th March 2013
多くの人が言及しているように、別の答えがあります。
これは@ kennebecの回答に直接基づいています。これは、このdate Ordinalを特定のJavaScript日付：
次のように2つのprototype functionを作成しました：
Date.prototype.getDateWithDateOrdinal = function() {
var d = this.getDate(); // from here on I've used Kennebec's answer, but improved it.
if(d>3 && d<21) return d+'th';
switch (d % 10) {
case 1: return d+"st";
case 2: return d+"nd";
case 3: return d+"rd";
default: return d+"th";
}
};
Date.prototype.getMonthName = function(shorten) {
var monthsNames = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
var monthIndex = this.getMonth();
var tempIndex = -1;
if (monthIndex == 0){ tempIndex = 0 };
if (monthIndex == 1){ tempIndex = 1 };
if (monthIndex == 2){ tempIndex = 2 };
if (monthIndex == 3){ tempIndex = 3 };
if (monthIndex == 4){ tempIndex = 4 };
if (monthIndex == 5){ tempIndex = 5 };
if (monthIndex == 6){ tempIndex = 6 };
if (monthIndex == 7){ tempIndex = 7 };
if (monthIndex == 8){ tempIndex = 8 };
if (monthIndex == 9){ tempIndex = 9 };
if (monthIndex == 10){ tempIndex = 10 };
if (monthIndex == 11){ tempIndex = 11 };
if (tempIndex > -1) {
this.monthName = (shorten) ? monthsNames[tempIndex].substring(0, 3) : monthsNames[tempIndex];
} else {
this.monthName = "";
}
return this.monthName;
};
注：JS Script内に上記のprototype関数を含めるだけで、以下の説明に従って使用します。
そして、JSdateがある場合はいつでも、日付序数で日付を生成する必要があります。そのJSdate：
var myDate = new Date();
// You may have to check your JS Console in the web browser to see the following
console.log("date with date ordinal: "+myDate.getDateWithDateOrdinal()+" "+myDate.getMonthName()+" "+myDate.getFullYear());
// or I will update the Div. using jQuery
$('#date').html("date with date ordinal: "+myDate.getDateWithDateOrdinal()+" "+myDate.getMonthName()+" "+myDate.getFullYear());
そして、以下のlive demoに示すようにdate ordinalで日付を出力します：
Date.prototype.getMonthName = function(shorten) {
var monthsNames = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
var monthIndex = this.getMonth();
var tempIndex = -1;
if (monthIndex == 0){ tempIndex = 0 };
if (monthIndex == 1){ tempIndex = 1 };
if (monthIndex == 2){ tempIndex = 2 };
if (monthIndex == 3){ tempIndex = 3 };
if (monthIndex == 4){ tempIndex = 4 };
if (monthIndex == 5){ tempIndex = 5 };
if (monthIndex == 6){ tempIndex = 6 };
if (monthIndex == 7){ tempIndex = 7 };
if (monthIndex == 8){ tempIndex = 8 };
if (monthIndex == 9){ tempIndex = 9 };
if (monthIndex == 10){ tempIndex = 10 };
if (monthIndex == 11){ tempIndex = 11 };
if (tempIndex > -1) {
this.monthName = (shorten) ? monthsNames[tempIndex].substring(0, 3) : monthsNames[tempIndex];
} else {
this.monthName = "";
}
return this.monthName;
};
Date.prototype.getDateWithDateOrdinal = function() {
var d = this.getDate(); // from here on I've used Kennebec's answer, but improved it.
if(d>3 && d<21) return d+'th';
switch (d % 10) {
case 1: return d+"st";
case 2: return d+"nd";
case 3: return d+"rd";
default: return d+"th";
}
};
var myDate = new Date();
// You may have to check your JS Console in the web browser to see the following
console.log("date with date ordinal: "+myDate.getDateWithDateOrdinal()+" "+myDate.getMonthName()+" "+myDate.getFullYear());
// or I will update the Div. using jQuery
$('#date').html("date with date ordinal: "+myDate.getDateWithDateOrdinal()+" "+myDate.getMonthName()+" "+myDate.getFullYear());<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p id="date"></p>。
function getSuffixForDate(day) {
const lastNumberOfTheDay = day[day.length];
const suffixes = {
1: () => 'st',
21: () => 'st',
31: () => 'st',
2: () => 'nd',
22: () => 'nd',
3: () => 'rd',
23: () => 'rd',
};
return suffixes[lastNumberOfTheDay] !== undefined ? `${day}${suffixes[lastNumberOfTheDay]()}` : `${day}th`;
}
const date = new Date();
const formattedDate = `${getSuffixForDate(date.getDate())} ${monthNames[date.getMonth()]} ${date.getFullYear()}`;
人間が読めるバージョン...
短くコンパクトなソリューション：
function format(date, tmp){
return [
(tmp = date.getDate()) +
([, 'st', 'nd', 'rd'][/1?.$/.exec(tmp)] || 'th'),
[ 'January', 'February', 'March', 'April',
'May', 'June', 'July', 'August',
'September', 'October', 'November', 'December'
][date.getMonth()],
date.getFullYear()
].join(' ')
}
// 14 days from today
console.log('14 days from today: ' +
format(new Date(+new Date + 14 * 864e5)));
// test formatting for all dates within a month from today
var day = 864e5, today = +new Date;
for(var i = 0; i < 32; i++) {
console.log('Today + ' + i + ': ' + format(new Date(today + i * day)))
}（順序サフィックスを取得するためのコンパクトな正規表現ベースのアプローチ 表示複数場所 Webの周り、元のソースは不明）
私はパーティーに少し遅れていますが、これはうまくいくはずです：
function ordinal(number) {
number = Number(number)
if(!number || (Math.round(number) !== number)) {
return number
}
var signal = (number < 20) ? number : Number(('' + number).slice(-1))
switch(signal) {
case 1:
return number + 'st'
case 2:
return number + 'nd'
case 3:
return number + 'rd'
default:
return number + 'th'
}
}
function specialFormat(date) {
// add two weeks
date = new Date(+date + 12096e5)
var months = [
'January'
, 'February'
, 'March'
, 'April'
, 'May'
, 'June'
, 'July'
, 'August'
, 'September'
, 'October'
, 'November'
, 'December'
]
var formatted = ordinal(date.getDate())
formatted += ' ' + months[date.getMonth()]
return formatted + ' ' + date.getFullYear()
}
document.body.innerHTML = specialFormat(new Date())
Date.prototype.getMonthName = function(shorten) {
var monthsNames = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"];
var monthIndex = this.getMonth();
var tempIndex = -1;
if (monthIndex == 0){ tempIndex = 0 };
if (monthIndex == 1){ tempIndex = 1 };
if (monthIndex == 2){ tempIndex = 2 };
if (monthIndex == 3){ tempIndex = 3 };
if (monthIndex == 4){ tempIndex = 4 };
if (monthIndex == 5){ tempIndex = 5 };
if (monthIndex == 6){ tempIndex = 6 };
if (monthIndex == 7){ tempIndex = 7 };
if (monthIndex == 8){ tempIndex = 8 };
if (monthIndex == 9){ tempIndex = 9 };
if (monthIndex == 10){ tempIndex = 10 };
if (monthIndex == 11){ tempIndex = 11 };
if (tempIndex > -1) {
this.monthName = (shorten) ? monthsNames[tempIndex].substring(0, 3) : monthsNames[tempIndex];
} else {
this.monthName = "";
}
return this.monthName;
};
Date.prototype.getDateWithDateOrdinal = function() {
var d = this.getDate(); // from here on I've used Kennebec's answer, but improved it.
if(d>3 && d<21) return d+'th';
switch (d % 10) {
case 1: return d+"st";
case 2: return d+"nd";
case 3: return d+"rd";
default: return d+"th";
}
};
var myDate = new Date();
// You may have to check your JS Console in the web browser to see the following
console.log("date with date ordinal: "+myDate.getDateWithDateOrdinal()+" "+myDate.getMonthName()+" "+myDate.getFullYear());
// or I will update the Div. using jQuery
$('#date').html("date with date ordinal: "+myDate.getDateWithDateOrdinal()+" "+myDate.getMonthName()+" "+myDate.getFullYear());<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p id="date"></p>