如何以12小时AM/PM格式显示JavaScript日期时间?
如何以12小时格式(AM/PM)显示JavaScript datetime对象?如何以12小时AM/PM格式显示JavaScript日期时间?,javascript,datetime,date,time,format,Javascript,Datetime,Date,Time,Format,如何以12小时格式(AM/PM)显示JavaScript datetime对象? 函数格式AMPM(日期){ var hours=date.getHours(); var minutes=date.getMinutes(); var ampm=小时数>=12?“下午”:“上午”; 小时数=小时数%12; 小时数=小时数?小时数:12;//小时数“0”应为“12” 分钟=分钟
函数格式AMPM(日期){
var hours=date.getHours();
var minutes=date.getMinutes();
var ampm=小时数>=12?“下午”:“上午”;
小时数=小时数%12;
小时数=小时数?小时数:12;//小时数“0”应为“12”
分钟=分钟<10?'0'+分钟:分钟;
var strTime=hours+':'+minutes+''+ampm;
返回时间;
}
console.log(formatAMPM(新日期))代码>签出。他们的内置格式化程序可以做到这一点:
这是一个非常方便的库,特别是当你打算用日期对象做其他事情时。这里有一种使用正则表达式的方法:
console.log(新日期('7/10/2013 20:12:34')。toLocaleTimeString()。替换(/([\d]+:[\d]{2})(:[\d]{2})(.*)/,“$1$3”))
console.log(新日期('7/10/2013 01:12:34')。toLocaleTimeString().replace(/([\d]+:[\d]{2})(:[\d]{2})(.*)/,“$1$3”)
适用于en-US的短RegExp:
var d = new Date();
d = d.toLocaleTimeString().replace(/:\d+ /, ' '); // current time, e.g. "1:54 PM"
下面是另一种简单有效的方法:
var d = new Date();
var weekday = new Array(7);
weekday[0] = "Sunday";
weekday[1] = "Monday";
weekday[2] = "Tuesday";
weekday[3] = "Wednesday";
weekday[4] = "Thursday";
weekday[5] = "Friday";
weekday[6] = "Saturday";
var month = new Array(11);
month[0] = "January";
month[1] = "February";
month[2] = "March";
month[3] = "April";
month[4] = "May";
month[5] = "June";
month[6] = "July";
month[7] = "August";
month[8] = "September";
month[9] = "October";
month[10] = "November";
month[11] = "December";
var t = d.toLocaleTimeString().replace(/:\d+ /, ' ');
document.write(weekday[d.getDay()] + ',' + " " + month[d.getMonth()] + " " + d.getDate() + ',' + " " + d.getFullYear() + '<br>' + d.toLocaleTimeString());
</script></div><!-- #time -->
var d=新日期();
var weekday=新数组(7);
工作日[0]=“周日”;
工作日[1]=“周一”;
工作日[2]=“星期二”;
工作日[3]=“星期三”;
工作日[4]=“周四”;
工作日[5]=“周五”;
工作日[6]=“周六”;
var月=新数组(11);
月[0]=“一月”;
月[1]=“2月”;
月[2]=“三月”;
月[3]=“4月”;
月[4]=“五月”;
月[5]=“6月”;
月[6]=“7月”;
月[7]=“8月”;
月[8]=“9月”;
月[9]=“10月”;
月[10]=“11月”;
月[11]=“12月”;
变量t=d.toLocaleTimeString().replace(/:\d+/,“”);
document.write(工作日[d.getDay()]+'、'+'+month[d.getMonth()]+'+d.getDate()+'、'+'+d.getFullYear()+'
'+d.toLocaleTimeString());
如果您不需要打印am/pm,我发现以下内容非常简洁:
var now = new Date();
var hours = now.getHours() % 12 || 12; // 12h instead of 24h, with 12 instead of 0.
这是基于@bbrame的答案 或者只需执行以下代码:
<script>
time = function() {
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
m = checkTime(m);
s = checkTime(s);
document.getElementById('txt_clock').innerHTML = h + ":" + m + ":" + s;
var t = setTimeout(function(){time()}, 0);
}
time2 = function() {
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
m = checkTime(m);
s = checkTime(s);
if (h>12) {
document.getElementById('txt_clock_stan').innerHTML = h-12 + ":" + m + ":" + s;
}
var t = setTimeout(function(){time2()}, 0);
}
time3 = function() {
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
if (h>12) {
document.getElementById('hour_line').style.width = h-12 + 'em';
}
document.getElementById('minute_line').style.width = m + 'em';
document.getElementById('second_line').style.width = s + 'em';
var t = setTimeout(function(){time3()}, 0);
}
checkTime = function(i) {
if (i<10) {i = "0" + i}; // add zero in front of numbers < 10
return i;
}
</script>
时间=函数(){
var today=新日期();
var h=today.getHours();
var m=today.getMinutes();
var s=today.getSeconds();
m=检查时间(m);
s=检查时间(s);
document.getElementById('txt_clock')。innerHTML=h+“:“+m+”:“+s;
var t=setTimeout(函数(){time()},0);
}
time2=函数(){
var today=新日期();
var h=today.getHours();
var m=today.getMinutes();
var s=today.getSeconds();
m=检查时间(m);
s=检查时间(s);
如果(h>12){
document.getElementById('txt_clock_stan')。innerHTML=h-12+“:“+m+”:“+s;
}
var t=setTimeout(函数(){time2()},0);
}
time3=函数(){
var today=新日期();
var h=today.getHours();
var m=today.getMinutes();
var s=today.getSeconds();
如果(h>12){
document.getElementById('hour_line')。style.width=h-12+'em';
}
document.getElementById('minute_line')。style.width=m+'em';
document.getElementById('second_line')。style.width=s+'em';
var t=setTimeout(函数(){time3()},0);
}
检查时间=功能(i){
如果(i我发现它工作正常
var date_format = '12'; /* FORMAT CAN BE 12 hour (12) OR 24 hour (24)*/
var d = new Date();
var hour = d.getHours(); /* Returns the hour (from 0-23) */
var minutes = d.getMinutes(); /* Returns the minutes (from 0-59) */
var result = hour;
var ext = '';
if(date_format == '12'){
if(hour > 12){
ext = 'PM';
hour = (hour - 12);
result = hour;
if(hour < 10){
result = "0" + hour;
}else if(hour == 12){
hour = "00";
ext = 'AM';
}
}
else if(hour < 12){
result = ((hour < 10) ? "0" + hour : hour);
ext = 'AM';
}else if(hour == 12){
ext = 'PM';
}
}
if(minutes < 10){
minutes = "0" + minutes;
}
result = result + ":" + minutes + ' ' + ext;
console.log(result);
var date_format='12';/*格式可以是12小时(12)或24小时(24)*/
var d=新日期();
var hour=d.getHours();/*返回小时数(从0到23)*/
var minutes=d.getMinutes();/*返回分钟数(从0-59)*/
var结果=小时;
var-ext='';
如果(日期\格式=='12'){
如果(小时>12){
ext='PM';
小时=(小时-12);
结果=小时;
如果(小时<10){
结果=“0”+小时;
}否则,如果(小时==12){
小时=“00”;
ext='AM';
}
}
否则,如果(小时<12){
结果=((小时<10)?“0”+小时:小时);
ext='AM';
}否则,如果(小时==12){
ext='PM';
}
}
如果(分钟<10){
分钟=“0”+分钟;
}
结果=结果+”:“+分钟+”+分机;
控制台日志(结果);
和plunker示例使用dateObj.toLocaleString([locales[,options]])
选项1-使用区域设置
var date = new Date();
console.log(date.toLocaleString('en-US'));
选项2-使用选项
var options = { hour12: true };
console.log(date.toLocaleString('en-GB', options));
注意:除safari atm外,所有浏览器均支持该功能如果您只想显示小时数,则
var time=新日期();
console.log(
time.tolocalString('en-US',{hour:'numeric',hour12:true})
);
您可以用这个简单的代码确定am或pm
var today=new Date();
var noon=new Date(today.getFullYear(),today.getMonth(),today.getDate(),12,0,0);
var ampm = (today.getTime()<noon.getTime())?'am':'pm';
var today=新日期();
var noon=新日期(今天.getFullYear(),今天.getMonth(),今天.getDate(),12,0,0);
var ampm=(today.getTime()据我所知,在没有扩展和复杂编码的情况下实现这一点的最佳方法如下:
date.toLocaleString([], { hour12: true});
单击按钮以字符串形式显示日期和时间
试试看
试试看
函数myFunction(){
var d=新日期();
var n=d.tolocalesting([],{hour:'2位',minute:'2位'});
document.getElementById(“demo”).innerHTML=n;
}
函数fullDateTime(){
var d=新日期();
var n=d.tolocalstring([],{hour12:true});
document.getElementById(“demo2”).innerHTML=n;
}
我的建议是使用矩js进行日期和时间操作
console.log(矩()格式('hh:mm a');
一个简短而甜蜜的实现:
// returns date object in 12hr (AM/PM) format
var formatAMPM = function formatAMPM(d) {
var h = d.getHours();
return (h % 12 || 12)
+ ':' + d.getMinutes().toString().padStart(2, '0')
+ ' ' + (h < 12 ? 'A' : 'P') + 'M';
};
<
<h1 id="clock_display" class="text-center" style="font-size:40px; color:#ffffff">[CLOCK TIME DISPLAYS HERE]</h1>
<script>
var AM_or_PM = "AM";
function startTime(){
var today = new Date();
var h = today.getHours();
var m = today.getMinutes();
var s = today.getSeconds();
h = twelve_hour_time(h);
m = checkTime(m);
s = checkTime(s);
document.getElementById('clock_display').innerHTML =
h + ":" + m + ":" + s +" "+AM_or_PM;
var t = setTimeout(startTime, 1000);
}
function checkTime(i){
if(i < 10){
i = "0" + i;// add zero in front of numbers < 10
}
return i;
}
// CONVERT TO 12 HOUR TIME. SET AM OR PM
function twelve_hour_time(h){
if(h > 12){
h = h - 12;
AM_or_PM = " PM";
}
return h;
}
startTime();
</script>
<script>
var todayDate = new Date();
var getTodayDate = todayDate.getDate();
var getTodayMonth = todayDate.getMonth()+1;
var getTodayFullYear = todayDate.getFullYear();
var getCurrentHours = todayDate.getHours();
var getCurrentMinutes = todayDate.getMinutes();
var getCurrentAmPm = getCurrentHours >= 12 ? 'PM' : 'AM';
getCurrentHours = getCurrentHours % 12;
getCurrentHours = getCurrentHours ? getCurrentHours : 12;
getCurrentMinutes = getCurrentMinutes < 10 ? '0'+getCurrentMinutes : getCurrentMinutes;
var getCurrentDateTime = getTodayDate + '-' + getTodayMonth + '-' + getTodayFullYear + ' ' + getCurrentHours + ':' + getCurrentMinutes + ' ' + getCurrentAmPm;
alert(getCurrentDateTime);
</script>
var d = new Date();
var amOrPm = (d.getHours() < 12) ? "AM" : "PM";
var hour = (d.getHours() < 12) ? d.getHours() : d.getHours() - 12;
return d.getDate() + ' / ' + d.getMonth() + ' / ' + d.getFullYear() + ' ' + hour + ':' + d.getMinutes() + ' ' + amOrPm;
H, HH 24 hour time
h, or hh 12 hour time (use in conjunction with a or A)
moment(new Date()).format("YYYY-MM-DD HH:mm"); // 24H clock
moment(new Date()).format("YYYY-MM-DD hh:mm A"); // 12H clock (AM/PM)
moment(new Date()).format("YYYY-MM-DD hh:mm a"); // 12H clock (am/pm)
function getTime() {
var systemDate = new Date();
var hours = systemDate.getHours();
var minutes = systemDate.getMinutes();
var strampm;
if (hours >= 12) {
strampm= "PM";
} else {
strampm= "AM";
}
hours = hours % 12;
if (hours == 0) {
hours = 12;
}
_hours = checkTimeAddZero(hours);
_minutes = checkTimeAddZero(minutes);
console.log(_hours + ":" + _minutes + " " + strampm);
}
function checkTimeAddZero(i) {
if (i < 10) {
i = "0" + i
}
return i;
}
var date = new Date();
var hours = date.getHours();
var minutes = date.getMinutes();
var seconds = date.getSeconds();
var ampm = hours >= 12 ? "pm" : "am";
function getDateTime() {
var now = new Date();
var year = now.getFullYear();
var month = now.getMonth() + 1;
var day = now.getDate();
if (month.toString().length == 1) {
month = '0' + month;
}
if (day.toString().length == 1) {
day = '0' + day;
}
var hours = now.getHours();
var minutes = now.getMinutes();
var ampm = hours >= 12 ? 'pm' : 'am';
hours = hours % 12;
hours = hours ? hours : 12;
minutes = minutes < 10 ? '0' + minutes : minutes;
var timewithampm = hours + ':' + minutes + ' ' + ampm;
var dateTime = monthNames[parseInt(month) - 1] + ' ' + day + ' ' + year + ' ' + timewithampm;
return dateTime;
}
let now = new Date();
new Intl.DateTimeFormat('default',
{
hour12: true,
hour: 'numeric',
minute: 'numeric'
}).format(now);
// 6:30 AM
09:56 AM
const formatAMPM = (date) => {
let hours = date.getHours();
let minutes = date.getMinutes();
const ampm = hours >= 12 ? 'pm' : 'am';
hours %= 12;
hours = hours || 12;
minutes = minutes < 10 ? `0${minutes}` : minutes;
const strTime = `${hours}:${minutes} ${ampm}`;
return strTime;
};
console.log(formatAMPM(new Date()));