jQuery toggleClass example

Toggle class name on click in jQuery

by SHELDON PASCIAK

HTML

<div id="banner-message">
  <p>Hello World</p>
  <button>Do Some Math</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

// find elements
var banner = $("#banner-message")
var button = $("button")

// takes a number (123) and fits it into specific size (00123)
let CODEfit = (value, size) => {
    var s = "0".repeat(size) + value + "";
    s = s.substr(s.length - size, size);
    return "" + s;    
}

function CODEshift(str, step) {
    var iterations = Math.abs(step);
    var holder = str.repeat(1);
    for (var i = 1; i <= iterations; i++) {
        if (step > 0) {
            var ll = holder.substr(0, 1);
            var mm = holder.substr(1);
            holder = mm + ll;
        }
        if (step < 0) {
            var ll = holder.substr(holder.length - 1, 1)
            var mm = holder.substr(0, holder.length - 1)
            holder = ll + mm;
        }
    }
    return holder.toString();
}

button.on("click", () => {

  banner.toggleClass("alt");   
  
  var TTT = "TEST"; 
  var nnn = 55;
  var newTTT = CODEshift(TTT,nnn);
  var unshiftedTTT = CODEshift(newTTT,-55);
  alert(' the word ' + TTT + ' shifted ' + nnn + ' = ' + newTTT + ' UNSHIFTED = ' + unshiftedTTT);
  
  var AAA = 123;
  var LLL = 8;
  var newAAA = CODEfit(AAA,LLL);
  alert(' the number ' + AAA + ' fit to a size  ' + LLL + ' = ' + newAAA);
  
    
  
})