js compare date strings code example

Example 1: compare dates in js

var date1 = new Date('December 25, 2017 01:30:00');
var date2 = new Date('June 18, 2016 02:30:00');

//best to use .getTime() to compare dates
if(date1.getTime() === date2.getTime()){
    //same date
}

if(date1.getTime() > date2.getTime()){
    //date 1 is newer
}

Example 2: date compare in js

var x = new Date('2013-05-23');
var y = new Date('2013-05-23');

// less than, greater than is fine:
x < y; => false
x > y; => false
x === y; => false, oops!

// anything involving '=' should use the '+' prefix
// it will then compare the dates' millisecond values
+x <= +y;  => true
+x >= +y;  => true
+x === +y; => true

Example 3: javascript compare dates

let d1 = new Date();
let d2 = new Date();
// can use >, <, <=, <=
d1 > d2
d1 >= d2
// == won't work so can use this:
(d1 >= d2) && (d2 >= d1)

Example 4: javascript compare dates

let myDate = new Date("January 13, 2021 12:00:00");
let yourDate = new Date("January 13, 2021 15:00:00");

if (myDate < yourDate) {
  console.log("myDate is less than yourDate"); // will be printed
}
if (myDate > yourDate) {
  console.log("myDate is greater than yourDate");
}