js only compares instances of time size

This article mainly brings you an example of js comparing only time size. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Let’s follow the editor to take a look, I hope it can help everyone.

The examples are as follows:

<script> 
 ///比较函数 
 function compareTime(date1, date2) { 
  var d1_year, d1_month, d1_day, d1, time_span1, 
    d2_year, d2_month, d2_day, d2, time_span2; 
  d1_year = date1.getFullYear(); 
  d1_month = date1.getMonth() + 1; 
  d1_day = date1.getDate(); 
  d1 = new Date(d1_year, d1_month - 1, d1_day, 0, 0, 0); 
  time_span1 = date1.getTime() - d1.getTime(); 
  d2_year = date2.getFullYear(); 
  d2_month = date2.getMonth() + 1; 
  d2_day = date2.getDate(); 
  d2 = new Date(d2_year, d2_month - 1, d2_day, 0, 0, 0); 
  time_span2 = date2.getTime() - d2.getTime(); 
  return time_span1 - time_span2; 
 } 
 //测试 
 <SPAN style="COLOR: #99cc00"> var date1 = new Date(2017, 10, 21, 20, 20, 21); 
 var date2 = new Date(2016, 5, 2, 20, 20, 30); 
 alert(compareTime(date1, date2));</SPAN> 
</script>

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