How TO - Tabs







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How TO - Tabs



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Learn how to create tabs with CSS and JavaScript.




Tabs


Tabs are perfect for single page web applications, or for web pages capable
of displaying different subjects:




  • London

  • Paris

  • Tokyo




London


London is the capital city of England.





Paris


Paris is the capital of France.





Tokyo


Tokyo is the capital of Japan.




Try it Yourself »




openCity(event, "London")
function openCity(evt, cityName) {
var i, tabcontent, tablinks;
tabcontent = document.getElementsByClassName("tabcontent");
for (i = 0; i < tabcontent.length; i++) {
tabcontent[i].style.display = "none";
}
tablinks = document.getElementsByClassName("tablinks");
for (i = 0; i < tabcontent.length; i++) {
tablinks[i].classList.remove("active");
}
document.getElementById(cityName).style.display = "block";
if (evt) {evt.currentTarget.classList.add("active");}
}

var mybtn = document.getElementsByClassName("tablinks")[0];
mybtn.click();


Create Toggleable Tabs


Step 1) Add HTML:


Example



<!-- Tab links -->
<div class="tab">
  <button class="tablinks" onclick="openCity(event,
'London')">London</button>
  <button class="tablinks" onclick="openCity(event,
'Paris')">Paris</button>
  <button class="tablinks" onclick="openCity(event,
'Tokyo')">Tokyo</button>
</div>

<!-- Tab content -->
<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>


Create buttons to open specific
tab content. All <div> elements with class="tabcontent" are hidden by default
(with CSS & JS). When the user clicks on a button - it will open the tab content
that "matches" this button.




Step 2) Add CSS:

Style the buttons and the tab content:



Example



/* Style the tab */
.tab {
    overflow: hidden;
   
border: 1px solid #ccc;
    background-color: #f1f1f1;
}

/* Style the buttons that are used to open the tab content */
.tab button {
   
background-color: inherit;
    float: left;
   
border: none;
    outline: none;
   
cursor: pointer;
    padding: 14px 16px;
   
transition: 0.3s;
}

/* Change background color of buttons on hover
*/
.tab button:hover {
    background-color: #ddd;
}

/* Create an active/current tablink class */
.tab button.active
{
    background-color: #ccc;
}

/* Style the tab content */
.tabcontent {
   
display: none;
    padding: 6px 12px;
   
border: 1px solid #ccc;
    border-top: none;
}









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Step 3) Add JavaScript:


Example



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 button that opened the tab
   
document.getElementById(cityName).style.display = "block";
   
evt.currentTarget.className += " active";
}

Try it Yourself »



Fade in Tabs:


If you want to fade in the tab content, add the following CSS:



Example



.tabcontent {
   
animation: fadeEffect 1s; /* Fading effect takes 1 second */
}

/* Go
from zero to full opacity */
@keyframes fadeEffect {
    from
{opacity: 0;}
    to {opacity: 1;}
}

Try it Yourself »



Show a tab by default


To open a specific tab on page load, use JavaScript to "click" on the specified tab
button:



Example



<button class="tablinks" onclick="openCity(event, 'London')" id="defaultOpen">London</button>

<script>
// Get the element with id="defaultOpen" and click on it
document.getElementById("defaultOpen").click();
</script>

Try it Yourself »



Close a tab


If you want to close a specific tab, use JavaScript to hide the tab with a click of a button:



Example



<!-- Click on the <span> element to close the tab -->

<div id="London" class="tabcontent">
  <h3>London</h3>
  <p>London is the capital city of England.</p>
  <span onclick="this.parentElement.style.display='none'">x</span>

</div>

Try it Yourself »


Tip: Also check out How To - Vertical Tabs.





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