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<!DOCTYPE html>
<style>
.scroller {
width: 100px;
height: 100px;
overflow: scroll;
/* to make the scroller a white mask over the content */
filter: brightness(0) invert(1);
position: relative;
top: -200px;
}
.content {
width: 100px;
height: 100px;
background: green;
}
</style>
<div class="content"></div>
<div class="content"></div>
<div class="scroller"></div>
<div class="scroller"></div>