I'm using w3schools's vertical tab menu to create a "How it works" menu like this: https://www.canva.com/graphs/
How can I loop through each tab to show the tabcontent div on a timer (while still letting users click the tabs and manually navigate)?
Thank you for any help!
The code from w3schools's vertical tabs:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {box-sizing: border-box}
body {font-family: "Lato", sans-serif;}
/* Style the tab */
.tab {
float: left;
border: 1px solid #ccc;
background-color: #f1f1f1;
width: 30%;
height: 300px;
}
/* Style the buttons inside the tab */
.tab button {
display: block;
background-color: inherit;
color: black;
padding: 22px 16px;
width: 100%;
border: none;
outline: none;
text-align: left;
cursor: pointer;
transition: 0.3s;
font-size: 17px;
}
/* Change background color of buttons on hover */
.tab button:hover {
background-color: #ddd;
}
/* Create an active/current "tab button" class */
.tab button.active {
background-color: #ccc;
}
/* Style the tab content */
.tabcontent {
float: left;
padding: 0px 12px;
border: 1px solid #ccc;
width: 70%;
border-left: none;
height: 300px;
}
</style>
</head>
<body>
<h2>Vertical Tabs</h2>
<p>Click on the buttons inside the tabbed menu:</p>
<div class="tab">
<button class="tablinks" onclick="openCity(event, 'London')" id="defaultOpen">London</button>
<button class="tablinks" onclick="openCity(event, 'Paris')">Paris</button>
<button class="tablinks" onclick="openCity(event, 'Tokyo')">Tokyo</button>
</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>
<script>
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 < tablinks.length; i++) {
tablinks[i].className = tablinks[i].className.replace(" active", "");
}
document.getElementById(cityName).style.display = "block";
evt.currentTarget.className += " active";
}
// Get the element with id="defaultOpen" and click on it
document.getElementById("defaultOpen").click();
</script>
</body>
</html>
You could use setTimeout to create a timer that will move your tabs. Here is the updated code:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
* {box-sizing: border-box}
body {font-family: "Lato", sans-serif;}
/* Style the tab */
.tab {
float: left;
border: 1px solid #ccc;
background-color: #f1f1f1;
width: 30%;
height: 300px;
}
/* Style the buttons inside the tab */
.tab button {
display: block;
background-color: inherit;
color: black;
padding: 22px 16px;
width: 100%;
border: none;
outline: none;
text-align: left;
cursor: pointer;
transition: 0.3s;
font-size: 17px;
}
/* Change background color of buttons on hover */
.tab button:hover {
background-color: #ddd;
}
/* Create an active/current "tab button" class */
.tab button.active {
background-color: #ccc;
}
/* Style the tab content */
.tabcontent {
float: left;
padding: 0px 12px;
border: 1px solid #ccc;
width: 70%;
border-left: none;
height: 300px;
}
</style>
</head>
<body>
<h2>Vertical Tabs</h2>
<p>Click on the buttons inside the tabbed menu:</p>
<div class="tab">
<button class="tablinks london" onclick="openCity(event, 'London')" id="defaultOpen">London</button>
<button class="tablinks paris" onclick="openCity(event, 'Paris')">Paris</button>
<button class="tablinks tokyo" onclick="openCity(event, 'Tokyo')">Tokyo</button>
</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>
<script>
// Create a list of classes for each button
var cities = ["london", "paris", "tokyo"];
var cityIndex = 0;
// Time in miliseconds for the rotation
var rotationInterval = 2000;
// This will find the correct button, click on it, and move to the next one
function rotateCity(index) {
var currentCityButton = document.querySelector("." + cities[index]);
currentCityButton.click();
// Recursive call
setTimeout(function(){
if (cityIndex < 2) {
cityIndex++;
} else {
cityIndex = 0;
}
rotateCity(cityIndex);
}, rotationInterval);
}
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 < tablinks.length; i++) {
tablinks[i].className = tablinks[i].className.replace(" active", "");
}
document.getElementById(cityName).style.display = "block";
evt.currentTarget.className += " active";
}
// Start rotation
rotateCity(cityIndex)
</script>
</body>
</html>