jQuery addClass example

Change class name on click in jQuery

by Gereltod Gotsbayar

HTML

<input type="text" id="myInput" />
<input type="button" value="234" onclick="setNewValue()" />
<div id="demo">
</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 setNewValue() {
  var x = document.getElementById("myInput");
  x.value=Math.floor(Math.random() * 11);
}

document.getElementById('myInput').addEventListener('change',function(event) {
    var x = document.getElementById("myInput").value;
  document.getElementById("demo").innerHTML = "You wrote: " + x;
});