Offset the vanishing point using padding | Goong Documents

Offset the center or vanishing point of the map to reduce distortion when floating elements are displayed over the map.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Offset the vanishing point using padding</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no" />
<script src="https://cdn.jsdelivr.net/npm/@goongmaps/goong-js@1.0.9/dist/goong-js.js"></script>
<link href="https://cdn.jsdelivr.net/npm/@goongmaps/goong-js@1.0.9/dist/goong-js.css" rel="stylesheet" />
<style>
	body { margin: 0; padding: 0; }
	#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<style>
.rounded-rect {
background: white;
border-radius: 10px;
box-shadow: 0 0 50px -25px black;
}
 
.flex-center {
position: absolute;
display: flex;
justify-content: center;
align-items: center;
}
 
.flex-center.left {
left: 0px;
}
 
.flex-center.right {
right: 0px;
}
 
.sidebar-content {
position: absolute;
width: 95%;
height: 95%;
font-family: Arial, Helvetica, sans-serif;
font-size: 32px;
color: gray;
}
 
.sidebar-toggle {
position: absolute;
width: 1.3em;
height: 1.3em;
overflow: visible;
display: flex;
justify-content: center;
align-items: center;
}
 
.sidebar-toggle.left {
right: -1.5em;
}
 
.sidebar-toggle.right {
left: -1.5em;
}
 
.sidebar-toggle:hover {
color: #0aa1cf;
cursor: pointer;
}
 
.sidebar {
transition: transform 1s;
z-index: 1;
width: 300px;
height: 100%;
}
 
/*
The sidebar styling has them "expanded" by default, we use CSS transforms to push them offscreen
The toggleSidebar() function removes this class from the element in order to expand it.
*/
.left.collapsed {
transform: translateX(-295px);
}
 
.right.collapsed {
transform: translateX(295px);
}
</style>
 
<div id="map">
<div id="left" class="sidebar flex-center left collapsed">
<div class="sidebar-content rounded-rect flex-center">
Left Sidebar
<div
class="sidebar-toggle rounded-rect left"
onclick="toggleSidebar('left')"
>
&rarr;
</div>
</div>
</div>
<div id="right" class="sidebar flex-center right collapsed">
<div class="sidebar-content rounded-rect flex-center">
Right Sidebar
<div
class="sidebar-toggle rounded-rect right"
onclick="toggleSidebar('right')"
>
&larr;
</div>
</div>
</div>
</div>
 
<script>
var center = [-77.01866, 38.888];
goongjs.accessToken = '8qzxZAuxcsctSlmOszInchP1A5GrmRBHJwCBCjO6';
var map = new goongjs.Map({
container: 'map',
zoom: 12.5,
center: center,
pitch: 60,
style: 'https://tiles.goong.io/assets/goong_map_web.json'
});
 
new goongjs.Marker().setLngLat(center).addTo(map);
 
function toggleSidebar(id) {
var elem = document.getElementById(id);
var classes = elem.className.split(' ');
var collapsed = classes.indexOf('collapsed') !== -1;
 
var padding = {};
 
if (collapsed) {
// Remove the 'collapsed' class from the class list of the element, this sets it back to the expanded state.
classes.splice(classes.indexOf('collapsed'), 1);
 
padding[id] = 300; // In px, matches the width of the sidebars set in .sidebar CSS class
map.easeTo({
padding: padding,
duration: 1000 // In ms, CSS transition duration property for the sidebar matches this value
});
} else {
padding[id] = 0;
// Add the 'collapsed' class to the class list of the element
classes.push('collapsed');
 
map.easeTo({
padding: padding,
duration: 1000
});
}
 
// Update the class list on the element
elem.className = classes.join(' ');
}
 
map.on('load', function () {
toggleSidebar('left');
});
</script>
 
</body>
</html>