blob: 4908f17855d77f0c2de04c9b27c390efb1ffb935 [file] [log] [blame]
<!DOCTYPE html>
<html>
<head>
<style>
body {
margin: 0;
}
#scroller {
position: relative;
z-index: 0;
width: 400px;
height: 400px;
margin: 20px;
overflow: scroll;
padding: 20px;
border: 30px solid orange;
box-sizing: border-box;
border-radius: 80px 200px;
background-color: silver;
}
.negative {
position: absolute;
top: 20px;
left: 30px;
z-index: 1;
padding: 20px;
background-color: gray;
transform: translateZ(0);
}
.contents {
height: 1000px;
background: linear-gradient(green, blue);
}
.masker {
position: absolute;
top: 49px;
left: 49px;
width: 342px;
height: 342px;
box-sizing: border-box;
border: 3px solid gray;
border-radius: 49px 170px;
}
</style>
<script>
window.addEventListener('load', () => {
scroller.scrollTo(0, 250);
}, false);
</script>
</head>
<body>
<div id="scroller">
<div class="negative"></div>
<div class="contents"></div>
</div>
<div class="masker"></div>
</body>
</html>