<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<div class="container">
<div class="row">
<p>
<a class="toggle btn btn-primary" href="#example">Toggle Div</a>
</p>
<div class="toggle-content" id="example">
Here's some text we want to toggle visibility of.
</div>
</div>
</div>
// Show an element
var show = function (elem) {
// Get the natural height of the element
var getHeight = function () {
elem.style.display = 'block'; // Make it visible
var height = elem.scrollHeight + 'px'; // Get it's height
elem.style.display = ''; // Hide it again
return height;
};
var height = getHeight(); // Get the natural height
elem.classList.add('is-visible'); // Make the element visible
elem.style.height = height; // Update the max-height
// Once the transition is complete, remove the inline max-height so the content can scale responsively
window.setTimeout(function () {
elem.style.height = '';
}, 350);
};
// Hide an element
var hide = function (elem) {
// Give the element a height to change from
elem.style.height = elem.scrollHeight + 'px';
// Set the height back to 0
window.setTimeout(function () {
elem.style.height = '0';
}, 1);
// When the transition is complete, hide it
window.setTimeout(function () {
elem.classList.remove('is-visible');
}, 350);
};
// Toggle element visibility
var toggle = function (elem, timing) {
// If the element is visible, hide it
if (elem.classList.contains('is-visible')) {
hide(elem);
return;
}
// Otherwise, show it
show(elem);
};
// Listen for click events
document.addEventListener('click', function (event) {
// Make sure clicked element is our toggle
if (!event.target.classList.contains('toggle')) return;
// Prevent default link behavior
event.preventDefault();
// Get the content
var content = document.querySelector(event.target.hash);
if (!content) return;
// Toggle the content
toggle(content);
}, false);
