js only compares instances of time size

The following editor will bring you an example of js onlycomparing time size. The editor thinks it’s pretty good, so I’ll share the js source code with you now and give it as a reference. If you are interested in js, please follow the editor to take a look.

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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