我如何比较两个日期 - 它们应该在日期或年份匹配

Question

I have the following dates

var date1 = moment(new Date(2019, 4, 17).valueOf());
var date2 = moment(new Date(2019, 4, 17).valueOf());

if i use

 if (date1.isSame(date2)) {
      c.log('same')
    } else {
      c.log('not same')
      // They are not on the same day
    }

then they will be same.

But how can i match - true when the year is different

var date1 = moment(new Date(2029, 4, 17).valueOf());
    var date2 = moment(new Date(2019, 4, 17).valueOf());

this should give true because they are both on 17 day.Even the year is different. This should also remain true

var date1 = moment(new Date(2019, 4, 17).valueOf());
var date2 = moment(new Date(2019, 4, 17).valueOf());

Answer 1

You can try this

var date1 = moment(new Date(2019, 4, 17).valueOf()).format('MM/DD');
var date2 = moment(new Date(2019, 4, 17).valueOf()).format('MM/DD');

if  (date1 === date2) 
    console.log('true'); 
else 
     console.log('false');

Answer 2

you could compare month and day to check if they're same, no matter the year:

if (date1.format('M') ===  date2.format('M') && date1.format('D') ===  date2.format('D'))
    console.log('day and month are the same')

EDIT: changed bug in condition

Answer 3

You should check if month which is represented by the format token M and day of month represented by the format token D are the same like this

if(date1.format('M') === date2.format('M') && date1.format('D') === date2.format('D')){
    // Your code goes here after
}

If they are the same that means It's the same day of the same month whatever the year