Javascript 使用 moment.js 检查日期格式
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/28587018/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
check format of date with moment.js
提问by rishi
I am taking input from calendar in my screen which is of this type
我正在从我的屏幕中的日历中获取输入，这是这种类型
DD-MMM-YYYY HH:mm a
but user can provide date from keyboard. Now I have to check whether user has provided the date in correct format or not. I am heavily using moment.js in my application and validating it like this
但用户可以从键盘提供日期。现在我必须检查用户是否以正确的格式提供了日期。我在我的应用程序中大量使用 moment.js 并像这样验证它
if(angular.equals(moment(scope.modelValue).format('DD-MMM-YYYY HH:mm a'), 'Invalid date'))
{
alert('date is not correct');
}
else
{
alert('date is correct');
}
It is working fine but the problem is if I provide input like '18-Feb-2015 2' then it is converted to '18-Feb-2015 00:00 am'. so now how to check that format is exactly what I want ? please help ..
它工作正常，但问题是如果我提供像“18-Feb-2015 2”这样的输入，那么它会被转换为“18-Feb-2015 00:00 am”。那么现在如何检查该格式正是我想要的？请帮忙 ..
回答by wallop
if it's just for checking the below is a better alternative
如果只是为了检查以下是更好的选择
moment(scope.modelValue, 'DD-MMM-YYYY HH:mm a', true).isValid()
回答by EAndreyF
For checking date format you could use:
要检查日期格式，您可以使用：
moment(checked_date, DATE_FORMAT).format(DATE_FORMAT) === checked_date
回答by Asif Karim Bherani
If you don't have a particular date format then you can also use Array of formats,
如果您没有特定的日期格式，那么您也可以使用格式数组，
moment(checked_date, [DATE_FORMAT1, DATE_FORMAT2]).format(DATE_FORMAT)
=== checked_date
回答by Lucas
This is much better:
这要好得多：
if (!moment(checked_date, DATE_FORMAT).isValid()) throw Error(Argument passed is invalid: checked_date. Date format must be ${DATE_FORMAT});
if (!moment(checked_date, DATE_FORMAT).isValid()) throw Error( Argument passed is invalid: checked_date. Date format must be ${DATE_FORMAT});
