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<!DOCTYPE html>
<style>
#scroller {
overflow-y: auto;
height: 200px;
border: 2px solid green;
position: relative;
background: gray;
}
.spacer {
height: 1000px;
}
#align {
box-sizing: border-box;
width: 100%;
height: 50px;
background: rgba(0, 0, 200, 0.2);
color: white;
position: absolute;
border: 1px solid white;
transform: translateY(200px);
will-change: transform;
}
#marker {
width: 100%;
height: 50px;
background: #640;
position: absolute;
top: 350px;
}
</style>
<div id="scroller">
<div id="align">TOP</div>
<div class="spacer"></div>
<div id="marker">BOTTOM</div>
</div>
<script>
scroller.scrollTo(0, 200);
</script>
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