jQuery addClass example

Change class name on click in jQuery

by Venkatesh Pottabathini

HTML

<div id="banner-message">
  <p>Hello World</p>
  <button>Change color</button>
</div>

CSS

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

#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

function getMyDate(selDate,weekno,dow){
var firstDay = new Date(selDate.getFullYear(), selDate.getMonth(), 1);

var curr = firstDay; // get current date
var first = curr.getDate() - curr.getDay(); 
var firstday = new Date(curr.setDate(first));


var daysToAdd = weekno * 7 + 1;


var weekstartdate =  new Date(firstday);

var weekstartdate2 =  selDate.setDate(selDate.getDate() + 6);

//alert(weekstartdate);
//alert(weekstartdate2);

}
var myDate2 = new Date("2020-02-11");

getMyDate(myDate2,2,4);


var today       =new Date();
  var in_a_week   =new Date().setDate(today.getDate()+7);
  var ten_days_ago=new Date().setDate(today.getDate()-10);
  
  alert(today);
  alert(in_a_week);
  alert(ten_days_ago);