如何将日期作为字符串转换为“dd/mm/yyyy”？

Question

We are using Moment.js to format the date.

How can I format such a date:

const createdAt = 'Mar 29 2019  5:02PM'

to a dd/mm/yyyy format?

I already tried with:

moment(createdAt).toDate();
moment(createdAt).format('DD/MM/YYYY');

but I got Invalid date for both.

Answer 1

You'll need to specify the format because that is not a known date format, something like this:

 const result = moment('Mar 29 2019 5:02PM', "MMM DD YYYY hh:mmA").format('DD/MM/YYYY'); console.log(result);

 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.min.js"></script>

Answer 2

You don't necessarily need moment to do that, especially if you need to tell it how to parse the string. For such a simply task, perhaps you could do it yourself?

 const convert = date_str => date_str.toLowerCase().replace(/^(\\w+) (\\d+) (\\d+) .+$/, (full_match, month, day, year) => { const month_num = month === 'jan' ? '01' : month === 'feb' ? '02' : month === 'mar' ? '03' : month === 'apr' ? '04' : month === 'may' ? '05' : month === 'jun' ? '06' : month === 'jul' ? '07' : month === 'aug' ? '08' : month === 'sep' ? '09' : month === 'oct' ? '10' : month === 'nov' ? '11' : '12'; return `${day}/${month_num}/${year}` }); console.log(convert('Mar 29 2019 5:02PM'));