ol-ext/control/Timeline.css

A set of cool extensions for OpenLayers (ol) in node modules structure

.ol-control.ol-timeline {
  bottom: 0;
  left: 0;
  right: 0;
  transition: .3s;
  background-color: rgba(255,255,255,.4);
}
.ol-control.ol-timeline.ol-collapsed {
  transform: translateY(100%);
}
.ol-timeline {
  overflow: hidden;
  padding: 2px 0 0;
}
.ol-timeline .ol-scroll {
  overflow: hidden;
  padding: 0;
  scroll-behavior: smooth;
  line-height: 1em;
  height: 6em;
  padding: 0 50%;
}
.ol-timeline .ol-scroll.ol-move {
  scroll-behavior: unset;
}

.ol-timeline.ol-hasbutton .ol-scroll {
  margin-left: 1.5em;
  padding: 0 calc(50% - .75em);
}
.ol-timeline .ol-buttons {
  display: none;
  position: absolute;
  top: 0;
  background: rgba(255,255,255,.5);
  width: 1.5em;
  bottom: 0;
  left: 0;
  z-index: 10;
}
.ol-timeline.ol-hasbutton .ol-buttons {
  display: block;
}
.ol-timeline .ol-buttons button {
  font-size: 1em;
  margin: 1px;
  position: relative;
}
.ol-timeline .ol-buttons .ol-zoom-in:before,
.ol-timeline .ol-buttons .ol-zoom-out:before {
  content: "+";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.ol-timeline .ol-buttons .ol-zoom-out:before{
  content: '−';
}

.ol-timeline .ol-scroll > div {
  height: 100%;
  position: relative;
}

.ol-timeline .ol-scroll .ol-times {
  background: rgba(255,255,255,.5);
  height: 1em;
  bottom: 0;
  position: absolute;
  left: -1000px;
  right: -1000px;
}
.ol-timeline .ol-scroll .ol-time {
  position: absolute;
  font-size: .7em;
  color: #999;
  bottom: 0;
  transform: translateX(-50%);
}
.ol-timeline .ol-scroll .ol-time.ol-year {
  color: #666;
  z-index: 1;
}
.ol-timeline .ol-scroll .ol-time:before {
  content: "";
  position: absolute;
  bottom: 1.2em;
  left: 50%;
  height: 500px;
  border-left: 1px solid currentColor;
}

.ol-timeline .ol-scroll .ol-features {
  position: absolute;
  top: 0;
  bottom: 1em;
  left: -200px;
  right: -1000px;
  margin: 0 0 0 200px;
  overflow: hidden;
}

.ol-timeline .ol-scroll .ol-feature {
  position: absolute;
  font-size: .7em;
  color: #999;
  top: 0;
  background: #fff;
  max-width: 3em;
  max-height: 2.4em;
  min-height: 1em;
  line-height: 1.2em;
  border: 1px solid #ccc;
  overflow: hidden;
  padding: 0 .5em 0 0;
  transition: all .3s;
  cursor: pointer;
  box-sizing: border-box;
}

.ol-timeline.ol-zoomhover .ol-scroll .ol-feature:hover,
.ol-timeline.ol-zoomhover .ol-scroll .ol-feature.ol-select {
  z-index: 1;
  transform: scale(1.2);
  background: #eee;
  /* max-width: 14em!important; */
}

/* Center */
.ol-timeline .ol-center-date {
  display: none;
  position: absolute;
  left: 50%;
  height: 100%;
  width: 2px;
  bottom: 0;
  z-index: 2;
  pointer-events: none;
  transform: translateX(-50%);
  background-color: #f00;
  opacity: .4;
}
.ol-timeline.ol-hasbutton .ol-center-date {
  left: calc(50% + .75em);
}

/* Show center */ 
.ol-timeline.ol-pointer .ol-center-date {
  display: block;
}
.ol-timeline.ol-pointer .ol-center-date:before, 
.ol-timeline.ol-pointer .ol-center-date:after {
  content: '';
  border: 0.3em solid transparent;
  border-width: .3em .25em;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.ol-timeline.ol-pointer .ol-center-date:before {
  border-top-color: #f00;
  top: 0;
}
.ol-timeline.ol-pointer .ol-center-date:after {
  border-bottom-color: #f00;
  bottom: 0
}

/* show interval */
.ol-timeline.ol-interval .ol-center-date {
  display: block;
  background-color: transparent;
  border: 0 solid #000;
  border-width: 0 10000px;
  box-sizing: content-box;
  opacity: .2;
}