如何以12小时格式(AM/PM)显示JavaScript datetime对象?
当前回答
const formatAMPM = (date) => {
try {
let time = date.split(" ");
let hours = time[4].split(":")[0];
let minutes = time[4].split(":")[1];
hours = hours || 12;
const ampm = hours >= 12 ? " PM" : " AM";
minutes = minutes < 10 ? `${minutes}` : minutes;
hours %= 12;
const strTime = `${hours}:${minutes} ${ampm}`;
return strTime;
} catch (e) {
return "";
}
};
const startTime = "2021-12-07T17:00:00.073Z"
formatAMPM(new Date(startTime).toUTCString())
其他回答
如果你不需要打印上午/下午，我发现以下内容很好很简洁:
var now = new Date();
var hours = now.getHours() % 12 || 12; // 12h instead of 24h, with 12 instead of 0.
这是基于@bbrame的回答。
据我所知，在不进行扩展和复杂编码的情况下实现这一目标的最佳方式是这样的:
date.toLocaleString([], { hour12: true});
Javascript AM/PM格式
<!DOCTYPE html> <html> <body> <p>Click the button to display the date and time as a string.</p> <button onclick="myFunction()">Try it</button> <button onclick="fullDateTime()">Try it2</button> <p id="demo"></p> <p id="demo2"></p> <script> function myFunction() { var d = new Date(); var n = d.toLocaleString([], { hour: '2-digit', minute: '2-digit' }); document.getElementById("demo").innerHTML = n; } function fullDateTime() { var d = new Date(); var n = d.toLocaleString([], { hour12: true}); document.getElementById("demo2").innerHTML = n; } </script> </body> </html>
我查这个问题时发现的。
我如何使用.toLocaleTimeString()而不显示秒?
更新以获得更多压缩
const formatAMPM = (date) => {
let hours = date.getHours();
let minutes = date.getMinutes();
const ampm = hours >= 12 ? 'pm' : 'am';
hours %= 12;
hours = hours || 12;
minutes = minutes < 10 ? `0${minutes}` : minutes;
const strTime = `${hours}:${minutes} ${ampm}`;
return strTime;
};
console.log(formatAMPM(new Date()));
使用dateObj。toLocaleString([地区[选项]])
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:支持除safari atm以外的所有浏览器
函数formatAMPM(date) { var hours = date.getHours(); var minutes = date.getMinutes(); Var ampm =小时>= 12 ?'pm': 'am'; 小时=小时% 12; 小时=小时?时长:12小时;//小时'0'应该是'12' 分钟=分钟< 10 ?'0'+minutes: minutes; var strTime = hours + ':' + minutes + ' + ampm; 返回strTime; ｝ console.log (formatAMPM(新日期));
