如何将Date对象格式化为字符串?
当前回答
Javascript Intl.DateTimeFormat方法提供了一种格式化日期的方便方法。
以下是如何构建所需格式:
常量日期=新日期(“2010-08-10”);let d=新Intl.DateTimeFormat('en-GB',{年:“数字”,月:“短”,日:“2位数”}).format(日期).split(“”).join(“-”);console.log(d);
其他回答
这是我实现npm插件的方式
var monthNames = [
"January", "February", "March",
"April", "May", "June", "July",
"August", "September", "October",
"November", "December"
];
var Days = [
"Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday"
];
var formatDate = function(dt,format){
format = format.replace('ss', pad(dt.getSeconds(),2));
format = format.replace('s', dt.getSeconds());
format = format.replace('dd', pad(dt.getDate(),2));
format = format.replace('d', dt.getDate());
format = format.replace('mm', pad(dt.getMinutes(),2));
format = format.replace('m', dt.getMinutes());
format = format.replace('MMMM', monthNames[dt.getMonth()]);
format = format.replace('MMM', monthNames[dt.getMonth()].substring(0,3));
format = format.replace('MM', pad(dt.getMonth()+1,2));
format = format.replace(/M(?![ao])/, dt.getMonth()+1);
format = format.replace('DD', Days[dt.getDay()]);
format = format.replace(/D(?!e)/, Days[dt.getDay()].substring(0,3));
format = format.replace('yyyy', dt.getFullYear());
format = format.replace('YYYY', dt.getFullYear());
format = format.replace('yy', (dt.getFullYear()+"").substring(2));
format = format.replace('YY', (dt.getFullYear()+"").substring(2));
format = format.replace('HH', pad(dt.getHours(),2));
format = format.replace('H', dt.getHours());
return format;
}
pad = function(n, width, z) {
z = z || '0';
n = n + '';
return n.length >= width ? n : new Array(width - n.length + 1).join(z) + n;
}
new Date().toLocaleDateString()// "3/21/2018"
developer.mozilla.org上的更多文档
不使用任何外部库的JavaScript解决方案:
var now = new Date()
months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
var formattedDate = now.getDate() + "-" + months[now.getMonth()] + "-" + now.getFullYear()
alert(formattedDate)
简短、广泛兼容的方法:
function formatDate(date) {
date.toISOString()
.replace(/^(\d+)-(\d+)-(\d+).*$/, // Only extract Y-M-D
function (a,y,m,d) {
return [
d, // Day
['Jan','Feb','Mar','Apr','May','Jun', // Month Names
'Jul','Ago','Sep','Oct','Nov','Dec']
[m-1], // Month
y // Year
].join('-') // Stitch together
})
}
或者,作为单行:
date.toISOString().replace(/^(\d+)-(\d+)-(\d+)T(\d+):(\d+):(\d+).(\d+)Z$/, function (a,y,m,d) {return [d,['Jan','Feb','Mar','Apr','May','Jun','Jul','Ago','Sep','Oct','Nov','Dic'][m-1],y].join('-')})
普通JavaScript是小型一次性应用程序的最佳选择。
另一方面,如果你需要更多约会内容,MomentJS是一个很好的解决方案。
例如:
moment().format('YYYY-MM-DD HH:m:s'); // now() -> 2015-03-24 14:32:20
moment("20111031", "YYYYMMDD").fromNow(); // 3 years ago
moment("20120620", "YYYYMMDD").fromNow(); // 3 years ago
moment().startOf('day').fromNow(); // 11 hours ago
moment().endOf('day').fromNow(); // in 13 hours