jQuery addClass example

Change class name on click in jQuery

by replicateur

HTML

<div id="banner-message">
  <p>Centrale Electrique</p>
    <div id="power"></div>
  <div id="count"></div>
  <br/>
  <button>Ajouter du charbon</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")
var count = 0;
var power = 1;
var delay = 1000

var timer = setInterval(function() {
  count += 1;
  document.getElementById('power').innerHTML = 'Power: ' + power;
  document.getElementById('count').innerHTML = 'Watts: ' + count;
}, delay)

// handle click and add class
button.on("click", function() {
  clearInterval(timer);
  delay = delay * 0.9;
  power += 1;
  timer = setInterval(function() {
    count += 1;
    document.getElementById('power').innerHTML = 'Power: ' + power;
    document.getElementById('count').innerHTML = 'Watts: ' + count;
  }, delay)
})