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HTML

              
                //PEN HEADER
header.header
  h1.header__title Timeline Inspiration
  .header__btns.btns
    a.header__btn.btn(href="https://github.com/nat-davydova/timeline" title="Check on Github" target="_blanc") Check on Github
    
//PEN CONTENT
.content

  //content title
  h2.content__title Material Design compatible and Responsive
  
  //content inner
  .content__inner
  
    .timeline
    
      //timeline bar
      .timeline__bar
      
      //timeline element
      .timeline__elem.timeline__elem--left
      
        //timeline element date
        .timeline__date
          span.timeline__date-day 10
          span.timeline__date-month Jul
          
        //timeline event
        .timeline__event
          
          //timeline event full date and time
          .timeline__event-date-time
          
            .timeline__event-date 
              span 10/07/2019
              
            .timeline__event-time
              span 12:30
         
          //timeline event title
          h4.timeline__event-title JS meetup
          
          //timeline event descrtiption
          .timeline__event-descr
            p Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.
            
          //timeline event actions links
          .timeline__event-actions
          
            a.timeline__event-action(href="#" title="Learn More") Learn More 
            
            a.timeline__event-action(href="#" title="Contact Us") Contact Us 
            
      //timeline element
      .timeline__elem.timeline__elem--right
      
        //timeline element date
        .timeline__date
          span.timeline__date-day 18
          span.timeline__date-month Jul
          
        //timeline event
        .timeline__event
        
          //timeline event full date and time
          .timeline__event-date-time
          
            .timeline__event-date 
              span 18/07/2019
              
            .timeline__event-time
              span 12:30
         
          //timeline event title
          h4.timeline__event-title CSS Con
          
          //timeline event descrtiption
          .timeline__event-descr
            p Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.
            
            p Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.
            
          //timeline event actions links
          .timeline__event-actions
          
            a.timeline__event-action(href="#" title="Learn More") Learn More 
            
            a.timeline__event-action(href="#" title="Contact Us") Contact Us
            
      //timeline element
      .timeline__elem.timeline__elem--left
      
        //timeline element date
        .timeline__date
          span.timeline__date-day 23
          span.timeline__date-month Jul
          
        //timeline event
        .timeline__event
        
          //timeline event full date and time
          .timeline__event-date-time
          
            .timeline__event-date 
              span 23/07/2019
              
            .timeline__event-time
              span 07:30
         
          //timeline event title
          h4.timeline__event-title React Workshop
          
          //timeline event descrtiption
          .timeline__event-descr
            p Lorem ipsum dolor sit amet, consetetur sadipscing elitr.
            
          //timeline event actions links
          .timeline__event-actions
          
            a.timeline__event-action(href="#" title="Learn More") Learn More 
            
            a.timeline__event-action(href="#" title="Contact Us") Contact Us 
            
      //timeline element
      .timeline__elem.timeline__elem--left
      
        //timeline element date
        .timeline__date
          span.timeline__date-day 06
          span.timeline__date-month Aug
          
        //timeline event
        .timeline__event
        
          //timeline event full date and time
          .timeline__event-date-time
          
            .timeline__event-date 
              span 06/08/2019
              
            .timeline__event-time
              span 12:30
         
          //timeline event title
          h4.timeline__event-title Angular Meetup
          
          //timeline event descrtiption
          .timeline__event-descr
            p Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.
            
            p Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.
            
          //timeline event actions links
          .timeline__event-actions
          
            a.timeline__event-action(href="#" title="Learn More") Learn More 
            
            a.timeline__event-action(href="#" title="Contact Us") Contact Us
            
      //timeline element
      .timeline__elem.timeline__elem--right
      
        //timeline element date
        .timeline__date
          span.timeline__date-day 17
          span.timeline__date-month Aug
          
        //timeline event
        .timeline__event
        
          //timeline event full date and time
          .timeline__event-date-time
          
            .timeline__event-date 
              span 17/08/2019
              
            .timeline__event-time
              span 16:30
         
          //timeline event title
          h4.timeline__event-title Vue.js Con
          
          //timeline event descrtiption
          .timeline__event-descr
            p Lorem ipsum dolor sit amet, consetetur sadipscing elitr.
            
          //timeline event actions links
          .timeline__event-actions
          
            a.timeline__event-action(href="#" title="Learn More") Learn More 
            
            a.timeline__event-action(href="#" title="Contact Us") Contact Us
          
            
            
           
        
          
              
            
!

CSS

              
                //mixins
@mixin transition-mix ($property: all, $duration: 0.2s, $timing: linear, $delay: 0s) {
  transition-property: $property;
  transition-duration: $duration;
  transition-timing-function: $timing;
  transition-delay: $delay;
}

@mixin position-absolute ($top: null, $left: null, $right: null, $bottom: null) {
  position: absolute;
  top: $top;
  left: $left;
  right: $right;
  bottom: $bottom;
}

//variables
$theme-font-color: #2c2c2c;

//common styles
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font: {
    family: 'Montserrat', sans-serif;
    size: 16px;
  }
  color: $theme-font-color;
  
  a {
    color: inherit;
    text-decoration: none;
  }
}

.btn {
  @include transition-mix;
  
  padding: 10px 20px;
  display: inline-block;
  margin-right: 10px;
  
  background-color: #fff;
  border: 1px solid $theme-font-color;
  border-radius: 3px;
  
  cursor: pointer;
  
  outline: none;
  
  &:last-child {
    margin-right: 0;
  }
  
  &:hover,
  &.js-active{
    color: #fff;
    
    background-color: $theme-font-color;
  }
}

//header styles
.header {
  max-width: 500px;
  margin: 50px auto;
  
  text-align: center;
}

.header__title {
  margin-bottom: 30px;
  
  font: {
    weight: 600;
  }
}

//content styles
.content {
  max-width: 800px;
  width: 95%;
  margin: 0 auto 40px;
}

.content__title {
  margin-bottom: 40px;
  
  font: {
    size: 18px;
    weight: 600;
  }
  text-align: center;
}

//timeline styles
$tablet-width: 900px;
$mobile-width: 560px;

$timeline-bar-bg-start: #ffce79;
$timeline-bar-bg-end: #9b74ff;
$timeline-bar-width: 6px;

.timeline {
  position: relative;
  
  min-height: 500px;
  width: 100%;
  padding: 60px 0;
}

.timeline__bar {
  @include position-absolute($top: 0, $left: 50%);
  
  width: $timeline-bar-width;
  height: 100%;
  
  transform: translateX(-50%);
  
  background-image: linear-gradient($timeline-bar-bg-start, $timeline-bar-bg-end);
  
  //decorations
  &:before,
  &:after {
    @include position-absolute($left: 50%);
    
    display: block;
    width: $timeline-bar-width + 6;
    height: $timeline-bar-width + 6;
    
    content: '';
    
    transform: translateX(-50%);
    
    border-radius: 50%;
  }
  
  &:before {
    top: -1px;
    
    background-color: $timeline-bar-bg-start;
  }
  
  &:after {
    bottom: -1px;
    
    background-color: $timeline-bar-bg-end;
  }
}

.timeline__elem {
  position: relative;
  
  display: flex;
  flex-direction: column;
  margin-bottom: 30px;
  
  &:last-child {
    margin-bottom: 0;
  }
  
  @media (min-width: $tablet-width) {
    flex-direction: row;
  }
}

.timeline__elem--right {
  
   @media (min-width: $tablet-width) {
    justify-content: flex-end;
  }
}

$timeline-date-dimensions: 70px;

.timeline__date { 
  position: relative;
  
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: $timeline-date-dimensions;
  height: $timeline-date-dimensions;
  margin: auto;
  
  color: #fff;
  
  background-repeat: no-repeat;
  border-radius: 50%;
  border: 6px solid #fff;
  
  @media (min-width: $tablet-width) {
     @include position-absolute($top: 50%, $left: 50%);
    
    transform: translate(-50%, -50%);
  }
}

.timeline__date-day {
  font: {
    size: 1.35rem;
    weight: 600;
  }
}

.timeline__date-month {
  font: {
    size: .85rem;
  }
}

$timeline-event-decor-dimensions: 8px;

.timeline__event {
  position: relative;
  
  width: 90%;
  margin: 30px auto 0;

 box-shadow: 
    0 2px 2px 0 rgba(0,0,0,0.14), 
    0 3px 1px -2px rgba(0,0,0,0.12), 
    0 1px 5px 0 rgba(0,0,0,0.2);
  
  background-color: #fff;
  
  @media (min-width: $mobile-width) {
    width: 65%;
  }

  @media (min-width: $tablet-width) {
      width: calc((100% - #{$timeline-date-dimensions} - #{$timeline-event-decor-dimensions} * 4) / 2);
     margin: 0;
  }

  //triangle decoration
  &:before {
    @include position-absolute($top: 50%);
    
    display: none;
    width: 0;
    height: 0;
    
    content: '';
    
    transform: translateY(-50%);
    
    border-top: $timeline-event-decor-dimensions solid transparent;
    border-bottom: $timeline-event-decor-dimensions solid transparent;
  }

  //decoration boxshadow
  &:after {
    @include position-absolute($top: 50%);
    
    display: none;
    width: ($timeline-event-decor-dimensions * 2);
    height: ($timeline-event-decor-dimensions * 2);;
    
    content: '';
    
    transform: translateY(-50%) rotate(45deg);
  }

  @media (min-width: $tablet-width) {

    &:before,
    &:after {
      display: block;
    }
  }
}

.timeline__event--left {
  
  &:before {
    right: (- $timeline-event-decor-dimensions);
    
    border-left: $timeline-event-decor-dimensions solid #fff;
  }
  
  &:after {
    right: - $timeline-event-decor-dimensions + 1;
    
    box-shadow: 2px -1px 1px 0 rgba(0,0,0,0.08);
  }
}

.timeline__event--right {
  
  &:before {
    left: - $timeline-event-decor-dimensions;
    
    border-right: $timeline-event-decor-dimensions solid #fff;
  }
  
  &:after {
    left: (- $timeline-event-decor-dimensions + 1);
    
    box-shadow: -2px 2px 1px 0 rgba(0,0,0,0.08);
  }
}

$timeline-padding-horz: 15px;
$timeline-padding-vert: 20px;

.timeline__event-date-time {
  padding: $timeline-padding-vert $timeline-padding-horz 0;
  
  display: flex;
  margin-bottom: 15px;
  
  font: {
    size: .8rem;
  }
  color: rgba($theme-font-color, .7);
}

.timeline__event-date {
  margin-right: 10px;
}

.timeline__event-title {
  padding: 0 $timeline-padding-horz;
  margin-bottom: 15px;
  
  font: {
    size: 1.25rem;
    weight: 600;
  }
}

.timeline__event-descr {
  padding: 0 $timeline-padding-horz $timeline-padding-vert;
  
  font: {
    size: .9rem;
  }
  line-height: 1rem;
  
  p {
    margin-bottom: 10px;
    
    &:last-child {
      margin-bottom: 0;
    }
  }
}

.timeline__event-actions {
  padding: $timeline-padding-vert $timeline-padding-horz;
  
  border-top: 1px solid rgba(160,160,160,0.2);
}

.timeline__event-action {
  @include transition-mix();
  
  margin-right: 24px;
  
  font: {
    size: .9rem;
  }
  text-transform: uppercase;
  
  &:hover {
    opacity: .4;
  }
}
              
            
!

JS

              
                //DOM STRINGS OBJECT
const DOM = {
  timelineDate: document.querySelectorAll('.timeline__date'),
  timelineElem: document.querySelectorAll('.timeline__elem'),
  timelineBar: document.querySelector('.timeline__bar')
};

//TIMELINE ELEM SET DIRECTION TO EVENT ITEMS (left or right oriented)

//getting direction from .timeline-elem
const __getDir = timelineElem => {
  
  if (timelineElem.classList.contains('timeline__elem--left')) {
    return 'left'
  } else if (timelineElem.classList.contains('timeline__elem--right')) {
    return 'right'
  }
  
};

const setDirEvent = () => {
  
  DOM.timelineElem.forEach(elem => {
    
    const direction = __getDir(elem);
    
    const timelineEvent = elem.querySelector('.timeline__event');
    
    timelineEvent.classList.add(`timeline__event--${direction}`);
    
  });
  
};

//TIMELINE ELEM DATE STYLES (background)
const __getBGImage = () => {
  
  const compStyle = getComputedStyle(DOM.timelineBar);
  
  return compStyle.backgroundImage;
  
};

const __getBGSize_height = () => {
  
  const timebarHeight = DOM.timelineBar.offsetHeight;
  
  return timebarHeight;
  
}

const __getBGPos_y = (dateElem) => {
  
  const timelinebarBox = DOM.timelineBar.getBoundingClientRect();
  
  const dateBox = dateElem.getBoundingClientRect();
  
  const pos_y = dateBox.top - timelinebarBox.top;
  
  return pos_y;
  
}

const setDateBG = () => {
  
  const bgImg = __getBGImage();
  
  const bgHeight = __getBGSize_height();
  
  DOM.timelineDate.forEach(elem => {
    
    //setting bgImage
    elem.style.backgroundImage = bgImg;
    
    //setting bgSize
    elem.style.backgroundSize = `100% ${bgHeight}px`;
    
    //setting bgPosition
    const dateOffset = __getBGPos_y(elem);
    
    elem.style.backgroundPosition = `0 -${dateOffset}px`;
    
  });
  
};

//ONLOAD FUNCTION
window.addEventListener('load', () => {
  
  //setting direction class to the timeline event block
  setDirEvent();
  
  //set date background styles
  setDateBG();
  
});


              
            
!
999px

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