<body style="height: 5000px">
<style>
body, /* blink currently has bug that requires declaration on `body` */
html {
scroll-snap-type: y proximity;
}
.snaptarget {
scroll-snap-align: start;
position: relative;
top: 200px;
height: 200px;
background-color: green;
}
</style>
<div class="snaptarget"></div>
</body>