sample: datedif and add class

by sii_side

HTML

<ul>
  <li>2016/8/20</li>
  <li>2016/9/1</li>
  <li>2016/9/25</li>
  <li>2016/10/1</li>
  <li>2016/10/10</li>
  <li>2016/11/13</li>
  <li>2016/12/24</li>
</ul>

CSS

.past {
  opacity: 0.5;
}

JavaScript

$("li").each(function() {
	var now  = new Date();
  var date = Date.parse($(this).text());
  if(date - now < 0) {
  	$(this).addClass("past");
  }
});