[英]What's a simple way to convert between an am/pm time to 24 hour time in javascript
I've been playing with jquery and I've run myself into a time problem. 我一直在玩jquery,我遇到了一个时间问题。 I've got 3 time input select boxes, one for hours, one for minutes, and one for the Meridian. 我有3个时间输入选择框,一个用于小时,一个用于分钟,一个用于Meridian。 I need to convert this time into a 24 hour string format and then stick it into a hidden input. 我需要将此时间转换为24小时字符串格式,然后将其粘贴到隐藏的输入中。
var time = "";
time += $("#EventCloseTimeHour option:selected").text();
time += ":" + $("#EventCloseTimeMin option:selected").text() + ":00";
time += " " + $("#EventCloseTimeMeridian option:selected").text();
$("#ConditionValue").val(time);
This gives me "1:30:00 pm" where I need "13:30:00". 这给了我“1:30:00 pm”,我需要“13:30:00”。 Any quick javascript time tips? 任何快速的javascript时间提示?
Example of tj111 suggestion: tj111建议示例:
$("#ConditionValue").val(
(
new Date(
"01/01/2000 " +
$("#EventCloseTimeHour option:selected").text() +
$("#EventCloseTimeMin option:selected").text() + ":00" +
" " +
$("#EventCloseTimeMeridian option:selected").text()
)
).toTimeString().slice(0,8))
;
Or you can use: 或者您可以使用:
hour = hour %12 + (meridian === "AM"? 0 : 12);
hour = hour < 10 ? "0" + hour : hour;
您应该查看本机JavaScript Date Object方法。
var time = "";
var hour = Number($("#EventCloseTimeHour option:selected").text())%12 + ($("#EventCloseTimeMeridian option:selected").text() == 'PM'?12:0)) ;
time +=("00"+String(hour)).slice(-2)+":"+ $("#EventCloseTimeMin option:selected").text();
The key to this solution is using the conditional operator "a?b:c" which translates to "if a then b else c" 这个解决方案的关键是使用条件运算符“a?b:c”,它转换为“if a then b else c”
Just to add a plain JS answer, the following will format the time based on the length of the initial string. 只是为了添加一个简单的JS答案,下面将根据初始字符串的长度格式化时间。 If h:mm returns HH:mm, if h:mm:ss returns HH:mm:ss. 如果h:mm返回HH:mm,如果h:mm:ss返回HH:mm:ss。
If HH:mm:ss is always required, it's simple to add default seconds of ":00" if not present in initial string. 如果总是需要HH:mm:ss,如果初始字符串中不存在,则添加“:00”的默认秒是很简单的。
// Change time in h:mm:ss ap to HH:mm:ss time // If time missing seconds, returns HH:mm function timeToHHmm(time) { var nums = time.match(/\\d+/g); var am = /am/i.test(time); nums[0] = ('0' + ((nums[0]%12) + (am? 0 : 12))).slice(-2); // If HH:mm:ss required, use following line instead of last // return nums.join(':') + (nums.length == 2? ':00' : ''); return nums.join(':'); } // Some tests ['2:45am', // hh:mm only '5:15:45pm', // hh:mm:ss '5:15:45 pm', // space before am/pm '05:15:45 pm',// leading zero on hour '12:02am', '12:02 pm', '12:02:00am' ].forEach(function(time) { console.log(time + ' => ' + timeToHHmm(time)); });
I got it with a few people's answers. 我得到了一些人的答案。
var time = "";
var hour = Number($("#EventCloseTimeHour option:selected").text());
if($("#EventCloseTimeMeridian option:selected").text() == 'PM'){
hour = String((hour%12) + 12);
}
hour = hour < 10 ? "0" + hour : hour;
time +=hour+":"+ $("#EventCloseTimeMin option:selected").text() + ":00";
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