JS：如何检查给定的日期是否从今天算起两年内？

Question

If I have a date time in milliseconds, how do I check if its within 2 years of today in JavaScript ? So far, I have the following:

var yearInMs = ( 1000 * 60 * 60 * 24 * 7 * 52 );
var givenTime = 1519183763504;
var diff =  givenTime - ( new Date().getTime());
diff = diff / yearInMs;
if( diff > 2 )
   alert('more than 2 years');

Is this correct ? How do account for things like leap years ?

Answer 1

Just at 2 years to today and see if it's greater than the supplied date or time value, eg

 var d = new Date(); d.setFullYear(d.getFullYear() + 2); if (d > 1519183763504) { console.log('within 2 years') } else { console.log('Not within 2 years') }