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Insecure Resource

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                <div class="js-module || module module-timeline-block">
  <div class="container || js-timeline">
    <div class="timeline row || js-timeline-container">
      <div class="timeline__column || col-12 || js-timeline-column">
        <div class="timeline__item">
          <div class="timeline__row || d-flex flex-column-reverse flex-md-row align-items-center">
            <div class="timeline__image -filler || ratio ratio-1x1">
            </div>
          </div>
          <div class="timeline__content">
            <h3>40th in UK Top 100</h3>
            <p>First time, out of 6, in the Virgin Sunday Times Fast Track 100. First time, out of 6, in the Virgin Sunday Times Fast Track 100.</p>
          </div>
        </div>
      </div>

      <div class="timeline__column || col-12 || js-timeline-column">
        <div class="timeline__item -even">
          <div class="timeline__row || d-flex flex-column-reverse  flex-md-row-reverse align-items-center">
            <div class="timeline__image -filler || ratio ratio-1x1"></div>
          </div>
          <div class="timeline__content">
            <h3>Hong Kong Office</h3>
            <p>We can host social events with up to 30 people at our Hong Kong quarters.</p>
          </div>
        </div>
      </div>

      <div class="timeline__column || col-12 || js-timeline-column">
        <div class="timeline__item">
          <div class="timeline__row || d-flex flex-column-reverse flex-md-row align-items-center">
            <div class="timeline__image -filler || ratio ratio-1x1"></div>
          </div>
          <div class="timeline__content">
            <h3>London Office</h3>
            <p>We can host social events with up to 30 people at our Hong Kong quarters.</p>
          </div>
        </div>
      </div>

      <div class="timeline__column || col-12 || js-timeline-column">
        <div class="timeline__item -even">
          <div class="timeline__row || d-flex flex-column-reverse  flex-md-row-reverse align-items-center">
            <div class="timeline__image -filler || ratio ratio-1x1">
            </div>
          </div>
          <div class="timeline__content">
            <h3>Singapore Office</h3>
            <p>We can host social events with up to 30 people at our Hong Kong quarters. We can host social events with up to 30 people at our Hong Kong quarters.</p>
          </div>
        </div>
      </div>

      <div class="timeline__column || col-12 || js-timeline-column">
        <div class="timeline__item">
          <div class="timeline__row || d-flex flex-column-reverse flex-md-row align-items-center">
            <div class="timeline__image -filler || ratio ratio-1x1">
            </div>
          </div>
          <div class="timeline__content">
            <h3>Random Test</h3>
            <p>This is a random test to see if this will do anything.</p>
          </div>
        </div>
      </div>

      <div class="timeline__column || col-12 || js-timeline-column">
        <div class="timeline__item -even">
          <div class="timeline__row || d-flex flex-column-reverse  flex-md-row-reverse align-items-center">
            <div class="timeline__image -filler || ratio ratio-1x1"></div>
          </div>
          <div class="timeline__content">
            <h3>Hong Kong Office</h3>
            <p>We can host social events with up to 30 people at our Hong Kong quarters.</p>
          </div>
        </div>
      </div>
    </div>
    <div class="timeline__range">
      <div class="draggable__range-range">
        <div class="draggable__range-container || js-timeline-range-container">
          <div class="draggable__range-knob || js-timeline-knob">
            <div class="draggable__range-knob__handle || js-timeline-knob-handle"></div>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>
!

CSS 

              
                body {
  height: 100vh;
  margin: 0;
}

.container {
  position: relative;
  overflow: hidden;
  max-height: 100vh;
}

.timeline__column {
  &:first-of-type {
    padding-top: 161px;
  }

  &:nth-child(even) {
    margin-top: -130px;
  }

  &:last-of-type {
    .timeline__item {
      padding-bottom: 40px;
    }
  }
}

.timeline__item {
  max-width: 493px;
  width: 100%;

  &.-even {
    margin-left: auto;
  }
}

.timeline__image {
  max-width: 323px;
  max-height: 323px;
  margin-right: 32px;

  .timeline__item.-even & {
    margin-left: 32px;
    margin-right: 0;
  }

  &.-filler {
    background-color: grey;
  }
}

.timeline__content {
  margin-top: 33px;
  max-width: 323px;

  .timeline__item.-even & {
    margin-left: auto;
  }
}

.timeline__date {
  width: 80px;
  height: 80px;
  min-width: 80px;
  min-height: 80px;
  background-color: grey;
  border-radius: 100%;
  color: #fff;
  font-size: 16px;
}

.timeline__range {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  height: calc(100% - 60px);
  // height: 600px;
}

.draggable__range-range {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 100%;
}

.draggable__range-container {
  background-color: black;
  width: 2px;
  height: 100%;
  position: relative;
}

.draggable__range-knob {
  position: absolute;
  top: 0;
  left: 50%;
}

.draggable__range-knob__handle {
  background-color: pink;
  width: 37px;
  height: 37px;
  position: absolute;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 7px solid #fff;
  display: flex;
  justify-content: center;
  align-items: center;

  img {
    max-height: 15px;
    width: auto;
  }
}
!

JS 

              
                gsap.registerPlugin(Draggable);

const timelineSlider = () => {
  const timelineContainer = document.querySelector(".js-timeline-container");
  let timelineContainerHeight = timelineContainer.getBoundingClientRect()
    .height;
  const rangeContainer = document.querySelector(".js-timeline-range-container");
  const knob = document.querySelector(".js-timeline-knob");
  const knobHandle = document.querySelector(".js-timeline-knob-handle");
  const knobHandleWidth = knobHandle.getBoundingClientRect().width;

  let timelineY;
  let draggableY;
  let mapperY;
  let rangeRectY = rangeContainer.offsetHeight;

  timelineY = gsap.timeline({ paused: true });

  draggableY = Draggable.create(knob, {
    type: "y",
    bounds: rangeContainer,
    lockAxis: true,
    edgeResistance: 1,
    overshootTolerance: 0,
    onDrag: updateRange
  });

  function updateMapper() {
    rangeRectY = rangeContainer.offsetHeight;
    mapperY = gsap.utils.mapRange(0, rangeRectY, 0, 1);
    timelineContainerHeight = timelineContainer.getBoundingClientRect().height;
    timelineY.to(timelineContainer, {
      y: -(timelineContainerHeight - rangeRectY - knobHandleWidth),
      duration: 1
    });
  }
  updateMapper();

  window.addEventListener("resize", updateMapper);

  function updateRange() {
    timelineY.progress(mapperY(this.y));
  }

  knobHandle.addEventListener("pointerdown", () => {
    gsap.to(knobHandle, { scale: 1.5 });
  });

  knobHandle.addEventListener("pointerup", () => {
    gsap.to(knobHandle, { scale: 1 });
  });

  rangeContainer.addEventListener("mouseleave", () => {
    gsap.to(knobHandle, { scale: 1 });
  });
};
timelineSlider();
!
999px

Console