jQuery addClass example

Change class name on click in jQuery

HTML

<div id="myElement">
  <a href="https://myawesomenewsite.com/departuretime/1253">1253</a>
  <a href="https://myawesomenewsite.com/departuretime/1255">1255</a>
  <a href="https://myawesomenewsite.com/departuretime/0955">0955</a>
  <a href="https://myawesomenewsite.com/departuretime/2213">2213</a>
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}
.you_have_time{
  color:green;
}

.you_dont_have_time{
  color:red;
}

#banner-message {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  font-size: 25px;
  text-align: center;
  transition: all 0.2s;
  margin: 0 auto;
  width: 300px;
}

button {
  background: #0084ff;
  border: none;
  border-radius: 5px;
  padding: 8px 14px;
  font-size: 15px;
  color: #fff;
}

#banner-message.alt {
  background: #0084ff;
  color: #fff;
  margin-top: 40px;
  width: 200px;
}

#banner-message.alt button {
  background: #fff;
  color: #000;
}

JavaScript

// find elements
var rootElements = $("#myElement a");

rootElements.each(function(index, item){
var url = item.href,
 arr_split = url.split("/"),
 arr_index = arr_split.length-1,
 departureTime = arr_split[arr_index],
 date = new Date(),
 myTime = date.getHours()+''+date.getMinutes();
 //add your class like this
 item.classList.add(myTime);
 
 //but you can also spice it up a bit
if(departureTime>myTime){
	 item.classList.add("you_have_time");
}else{
	item.classList.add("you_dont_have_time");
}

});