timeline_styles-8.x-1.x-dev/templates/timeline-styles.html.twig

<style>
section {
  padding: 100px 0;
}

.vl {
  border-left: 6px solid grey;
  height: 100%;
  position: absolute;
  left: 50%;
  margin-left: -43px;
  top: 0;
}

h1 {
  font-size: 200%;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-weight: 400;
}

header {
  background: $primary;
  color: $text;

  p {
    font-family: 'Allura';
    color: rgba(255, 255, 255, .2);
    margin-bottom: 0;
    font-size: 60px;
    margin-top: -30px;

  }
}

.timeline {

  position: relative;

  &::before {
    content: '';
    background: $light-primary;
    width: 5px;
    height: 95%;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
  }
}

.timeline-item:nth-child(even) {
  width: 100%;
  margin-bottom: 70px;
  display: flex;
  justify-content: flex-end;
}

.timeline-item:nth-child(odd) {
  width: 100%;
  margin-bottom: 70px;
  display: flex;
  justify-content: flex-start;
  margin-left: -81px;
}

.timeline-content {
  position: relative;
  width: 50%;
  padding: 10px 30px;
  border-radius: 4px;
  background: #f5f5f5;
  box-shadow: 0 20px 25px -15px rgba(0, 0, 0, .3);

  &::after {
    content: '';
    position: absolute;
    border-style: solid;
    width: 0;
    height: 0;
    top: 30px;
    right: -15px;
    border-width: 10px 0 10px 15px;
    border-color: transparent transparent transparent #f5f5f5;
  }
}

.timeline-card {
  padding: 0!important;

  p {
    padding: 0 20px;
  }
}

.date {
  background: $accent;
  display: inline-block;
  color: $text;
  padding: 10px;
  position: absolute;
  top: 0;
  right: 0;
}

@media screen and (max-width: 768px) {

  .timeline {

    &::before {
      left: 50px;
    }


    .timeline-content {
      max-width: 100%;
      width: auto;
      margin-left: 70px;
    }

    .timeline-item {

      &:nth-child(even) {

        .timeline-content {
          float: none;

        }
      }

      &:nth-child(odd) {

        .timeline-content {
          &::after {
            content: '';
            position: absolute;
            border-style: solid;
            width: 0;
            height: 0;
            top: 30px;
            left: -30px;
            border-width: 10px 15px 10px 0;
            border-color: transparent #f5f5f5 transparent transparent;
          }
        }

      }
    }
  }
}
/* js start */


.timeline-item .timeline-content.js--fadeInLeft:after{
    content: '';
    position: absolute;
    background: grey;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    z-index: 99;
}

.timeline-item:nth-child(odd) .timeline-content.js--fadeInLeft:after{
    right: -54px;
    top: 25px;
}
.timeline-item:nth-child(even) .timeline-content.js--fadeInLeft:after{
    left: -53px;
    top: 25px;
}
</style>

<section class="timeline">
  <div class="container">
    {% for key, row in rows %}
      <div class="timeline-item">
        <div class="vl"></div>
        <div class="timeline-content js--fadeInLeft">
          <h2>{{ row.content['#row']._entity.title.value | raw }}</h2>
          <div class="date">{{ row.content['#row']._entity.field_timeline_styles_date.value | raw }}</div>
          <p>{{ row.content['#row']._entity.body.value | raw }}</p>
        </div>
      </div>
    {% endfor %}
  </div>
</section>