Tabs

JavaScript Tabs

by Radhika Magaji

HTML

<div class="tab">
  <a href="javascript:void(0)" class="tablinks" onclick="openCity(event, 'London')">London</a>
  <a href="javascript:void(0)" class="tablinks" onclick="openCity(event, 'Paris')">Paris</a>
  <a href="javascript:void(0)" class="tablinks" onclick="openCity(event, 'Tokyo')">Tokyo</a>
</div>

<div id="London" class="tabcontent">
  <h3>London</h3>
  <p>London is the capital city of England.</p>
</div>

<div id="Paris" class="tabcontent">
  <h3>Paris</h3>
  <p>Paris is the capital of France.</p>
</div>

<div id="Tokyo" class="tabcontent">
  <h3>Tokyo</h3>
  <p>Tokyo is the capital of Japan.</p>
</div>

CSS

.tab{
  width:200px;
  margin-right: auto;
  margin-left: auto
}

JavaScript

function openCity(evt, cityName) {
  // Declare all variables
  var i, tabcontent, tablinks;

  // Get all elements with class="tabcontent" and hide them
  tabcontent = document.getElementsByClassName("tabcontent");
  for (i = 0; i < tabcontent.length; i++) {
    tabcontent[i].style.display = "none";
  }

  // Get all elements with class="tablinks" and remove the class "active"
  tablinks = document.getElementsByClassName("tablinks");
  for (i = 0; i < tablinks.length; i++) {
    tablinks[i].className = tablinks[i].className.replace(" active", "");
  }

  // Show the current tab, and add an "active" class to the link that opened the tab
  document.getElementById(cityName).style.display = "block";
  evt.currentTarget.className += " active";
}