jQuery addClass example

Change class name on click in jQuery

by Dominik Wilk

HTML

<mjml>
  <mj-body>
    <mj-section background-color="#acca35" padding="0">
      <mj-column background-color="#fff">
        <mj-text>
          <h2>Serdecznie zapraszamy</h2>
          <p>do odwiedzenia nas podczas TargĂłw DREMA<br>
            w Poznaniu w dniach <strong>10-15.09.2019</strong></p>
          <h3>pawilon 3, stoisko 23.</h3>
        </mj-text>
      </mj-column>
      <mj-column>
        <mj-text>
          <h2>IKEA Industry Poland Sp. z o.o.</h2>
          <p>ul. Grabskiego 43/43a, 37-450 Stalowa Wola
            Tel. +48 15 840 01 00</p>
        </mj-text>
      </mj-column>
    </mj-section>
  </mj-body>
</mjml>

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")

// handle click and add class
button.on("click", function(){
  banner.addClass("alt")
})