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.flex {
display: flex;
}
.flex > div {
position: relative;
height: 160px;
margin: 0 10px;
}
.scroller {
width: 100px;
height: 100px;
overflow: auto;
border: 1px solid black;
}
.subject {
view-timeline-name: --view;
width: 20px;
height: 20px;
margin: 100px auto;
background: green;
}
.meters {
position: absolute;
left: 0;
top: 110px;
height: 50px;
}
.meters > div {
display: flex;
align-items: center;
}
@keyframes active-interval {
0% { opacity: 1; }
100% { opacity: 1; }
}
.meter {
width: 50px;
position: relative;
border: 2px solid black;
height: 5px;
overflow: clip;
opacity: 0.4;
animation: active-interval linear;
animation-timeline: --view;
}
@keyframes slide-in {
0% { transform: translateX(-100%)}
100% { transform: translateX(0%)}
}
.bar {
width: 100%;
height: 100%;
background: blue;
transform: translateX(-100%);
animation: slide-in linear;
animation-timeline: --view;
}
.spacer {
height: 400px;
}
.contain .bar, .contain .meter {
animation-range: contain;
}
.entry .bar, .entry .meter {
animation-range: entry;
}
.exit .bar, .exit .meter {
animation-range: exit;
}