MomentJS 在返回错误数据后

Question

I want to know if a date (2021-11-09) is after another date (2021-11-11) in YYYY-MM-DD format, which should be false, right ?

  console.log(
    moment("2021-11-09", "YYYY-MM-DD", true).isAfter(
      "2011-11-11",
      "YYYY-MM-DD",
      true
    )
  );

but, above code return true.

Answer 1

the doc of momentjs states:

If you want to limit the granularity to a unit other than milliseconds, pass the units as the second parameter.

As the second parameter determines the precision , and not just a single value to check, using day will check for year, month and day

So you should use a unit instead of format string though it seems the result is same.

 console.log( moment("2021-11-09", "YYYY-MM-DD", true).isAfter( "2011-11-11", "day" //"YYYY-MM-DD" ) ) console.log( moment("2021-11-09", "YYYY-MM-DD", true).isAfter( "2021-11-11", "day" //"YYYY-MM-DD" ) )

 <script src="https://unpkg.com/moment@2.29.1/moment.js"></script>

Answer 2

The dates you're comparing in code and the ones in your questions are not aligned. And code is returning true correctly. Because 2021-11-09 is indeed after 2011-11-11