index.js
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import addLeadingZeros from '../../addLeadingZeros/index.js';
/*
* | | Unit | | Unit |
* |-----|--------------------------------|-----|--------------------------------|
* | a | AM, PM | A* | |
* | d | Day of month | D | |
* | h | Hour [1-12] | H | Hour [0-23] |
* | m | Minute | M | Month |
* | s | Second | S | Fraction of second |
* | y | Year (abs) | Y | |
*
* Letters marked by * are not implemented but reserved by Unicode standard.
*/
var formatters = {
// Year
y: function (date, token) {
// From http://www.unicode.org/reports/tr35/tr35-31/tr35-dates.html#Date_Format_tokens
// | Year | y | yy | yyy | yyyy | yyyyy |
// |----------|-------|----|-------|-------|-------|
// | AD 1 | 1 | 01 | 001 | 0001 | 00001 |
// | AD 12 | 12 | 12 | 012 | 0012 | 00012 |
// | AD 123 | 123 | 23 | 123 | 0123 | 00123 |
// | AD 1234 | 1234 | 34 | 1234 | 1234 | 01234 |
// | AD 12345 | 12345 | 45 | 12345 | 12345 | 12345 |
var signedYear = date.getUTCFullYear(); // Returns 1 for 1 BC (which is year 0 in JavaScript)
var year = signedYear > 0 ? signedYear : 1 - signedYear;
return addLeadingZeros(token === 'yy' ? year % 100 : year, token.length);
},
// Month
M: function (date, token) {
var month = date.getUTCMonth();
return token === 'M' ? String(month + 1) : addLeadingZeros(month + 1, 2);
},
// Day of the month
d: function (date, token) {
return addLeadingZeros(date.getUTCDate(), token.length);
},
// AM or PM
a: function (date, token) {
var dayPeriodEnumValue = date.getUTCHours() / 12 >= 1 ? 'pm' : 'am';
switch (token) {
case 'a':
case 'aa':
case 'aaa':
return dayPeriodEnumValue.toUpperCase();
case 'aaaaa':
return dayPeriodEnumValue[0];
case 'aaaa':
default:
return dayPeriodEnumValue === 'am' ? 'a.m.' : 'p.m.';
}
},
// Hour [1-12]
h: function (date, token) {
return addLeadingZeros(date.getUTCHours() % 12 || 12, token.length);
},
// Hour [0-23]
H: function (date, token) {
return addLeadingZeros(date.getUTCHours(), token.length);
},
// Minute
m: function (date, token) {
return addLeadingZeros(date.getUTCMinutes(), token.length);
},
// Second
s: function (date, token) {
return addLeadingZeros(date.getUTCSeconds(), token.length);
},
// Fraction of second
S: function (date, token) {
var numberOfDigits = token.length;
var milliseconds = date.getUTCMilliseconds();
var fractionalSeconds = Math.floor(milliseconds * Math.pow(10, numberOfDigits - 3));
return addLeadingZeros(fractionalSeconds, token.length);
}
};
export default formatters;