<!DOCTYPE html>
<div style="overflow: scroll; outline: 10px solid green; width: 200px; height: 200px;
background-color: blue">
<div style="height: 2000px"></div>
</div>
<!DOCTYPE html>
<div style="overflow: scroll; outline: 10px solid green; width: 200px; height: 200px;
background-color: blue">
<div style="height: 2000px"></div>
</div>