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<!DOCTYPE html>
<html>
<head>
<style>
body.scrollable {
width: 200lvw;
height: 200lvh;
}
div {
width: 200px;
height: 200px;
background-color: skyblue;
}
::view-transition-new(*) {
animation-duration: 30s;
opacity: 0;
}
::view-transition-old(*) {
animation: unset;
opacity: 1;
}
*/
</style>
<script>
function startTransition() {
window.transition = document.startViewTransition(() => {
document.body.classList.toggle('scrollable');
});
}
onload = () => {
const params = new URLSearchParams(window.location.search);
if (params.has('scrollbar')) {
document.body.classList.add('scrollable');
}
}
</script>
</head>
<body>
<div></div>
</body>
</html>