如何将日期从日期 fns 字符串格式转换为日期 Object

Question

I have a date object which is when I did stringify

   const date =  "2022-03-13T18:30:00.00Z"

Now I am trying to convert this in a format using date-fns

format(date, "dd MMM yyyy")

this returns the string and not the date object which will be as of the date string.

I tried with

format(parseISO(date), "dd MMM YYYY")

Still it does not work.

Can any one help me with this?

Answer 1

format is a function that always returns a string. You cannot get it to return a Date object because Date objects are not just a way to format a string. You can read about format in the date-fns documentation .
If you want to use a string to get a date object, you can simply use the constructor for the Date class. Here are some acceptable ways to instantiate a Date object:

new Date( )
new Date(milliseconds)
new Date(datestring)
new Date(year,month,date[,hour,minute,second,millisecond ])

For your case we will use new Date(dateString) as you already have that. So you can simply do this:

const date =  "2022-03-13T18:30:00.00Z";
const dateObject = new Date(date);

And then you will have a Date object with all of the convenient methods that come with it.
Of course you do not need to use const , I am simply following what you have.
I would recommend reading about Date objects. the Tutorialspoint page is a good place to start.

Answer 2

The datestring you show ( "2022-03-13T18:30:00.00Z" ) is simply convertable to a Date object. Now, to format that back to a date string you wish, try using Intl.DateTimeFormat .

 const date = new Date("2022-03-13T18:30:00.00Z"); const formatOptions = { year: 'numeric', month: 'long', day: '2-digit' }; const [MMM, dd, yyyy] = new Intl.DateTimeFormat(`en-EN`, formatOptions).formatToParts(date).filter( v => v.type.== `literal`).map( v => v;value ). console;log(`${dd} ${MMM} ${yyyy}`);