Is Same

This indicates whether the Day.js object is the same as the other supplied date-time.

dayjs().isSame(dayjs('2011-01-01')); // default milliseconds

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

When including a second parameter, it will match all units equal or larger. Passing in month will check month and year. Passing in day will check day, month, and year.

dayjs().isSame('2011-01-01', 'year');

Units are case insensitive, and support plural and short forms.

List of all available units