Slider

by webgleb

HTML

<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.1/css/all.min.css">
<div class="container">

    <div class="sidebar">
        <div style="background: linear-gradient(229.99deg, #c3a9a0 -26%, #bf9f8d 145%);">
            <h1>Barcelona</h1>
            <p>Love</p>
        </div>
        <div style="background: linear-gradient(215.32deg, #ae6e66 -1%, #633635 124%);">
            <h1>Budapest</h1>
            <p>Hungary</p>
        </div>
        <div style="background: linear-gradient(221.87deg, #3f6669 1%, #35583e 128%);">
            <h1>Vienna</h1>
            <p>Austria</p>
        </div>
        <div style="background: linear-gradient(220.16deg, #f0f0f0 -8%, #2fbfd9 138%);">
            <h1>Milan</h1>
            <p>Italy</p>
        </div>
    </div>

    <div class="main-slide">
        <div style="background-image: url('https://images.unsplash.com/photo-1539108842340-ae72fbf39857?ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=2000&q=80');"></div>
        <div style="background-image: url('https://images.unsplash.com/photo-1573599852326-2d4da0bbe613?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=2000&q=80');"></div>
        <div style="background-image: url('https://images.unsplash.com/photo-1565426873118-a17ed65d74b9?ixlib=rb-1.2.1&ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&auto=format&fit=crop&w=2000&q=80');"></div>
        <div style="background-image: url('https://images.unsplash.com/photo-1512920186713-b2539975097a?ixid=MnwxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8&ixlib=rb-1.2.1&auto=format&fit=crop&w=2000&q=80');" ></div>
    </div>

    <div class="controls">
        <button class="down-button">
            <i class="fas fa-arrow-down"></i>
        </button>
        <button class="up-button">
            <i class="fas fa-arrow-up"></i>
        </button>
    </div>
</div>

CSS

@import url('https://fonts.googleapis.com/css?family=Roboto&display=swap');

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

body {
  font-family: 'Roboto', sans-serif;
  height: 100vh;
}

.container {
  position: relative;
  overflow: hidden;
  width: 100vw;
  height: 100vh;
}

.sidebar {
  height: 100%;
  width: 35%;
  position: absolute;
  top: 0;
  left: 0;
  transition: transform 0.5s ease-in-out;
}

.sidebar>div {
  height: 100%;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.sidebar h1 {
  font-size: 40px;
  margin-bottom: 10px;
  margin-top: -30px;
}

.main-slide {
  height: 100%;
  position: absolute;
  top: 0;
  left: 35%;
  width: 65%;
  transition: transform 0.5s ease-in-out;
}

.main-slide>div {
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center center;
  height: 100%;
  width: 100%;
}

button {
  background-color: #fff;
  border: none;
  color: #aaa;
  cursor: pointer;
  font-size: 16px;
  padding: 15px;
}

button:hover {
  color: #222;
}

button:focus {
  outline: none;
}

.container .controls button {
  position: absolute;
  left: 35%;
  top: 50%;
  z-index: 100;
}

.container .controls .down-button {
  transform: translateX(-100%);
  border-top-left-radius: 5px;
  border-bottom-left-radius: 5px;
}

.container .controls .up-button {
  transform: translateY(-100%);
  border-top-right-radius: 5px;
  border-bottom-right-radius: 5px;
}

JavaScript

const upBtn = document.querySelector('.up-button')
const downBtn = document.querySelector('.down-button')
const sidebar = document.querySelector('.sidebar')
const container = document.querySelector('.container')
const mainSlide = document.querySelector('.main-slide')
const slidesCount = mainSlide.querySelectorAll('div').length

let activeSlideIndex = 0

sidebar.style.top = `-${(slidesCount - 1) * 100}vh`

upBtn.addEventListener('click', () => {
    changeSlide('up')
})

downBtn.addEventListener('click', () => {
    changeSlide('down')
})

function changeSlide(direction) {
    if (direction === 'up') {
        activeSlideIndex++;
        if (activeSlideIndex === slidesCount) {
            activeSlideIndex = 0
        }
    } else if (direction === 'down') {
        activeSlideIndex--;
        if (activeSlideIndex < 0) {
            activeSlideIndex = slidesCount - 1
        }
    }

    const height = container.clientHeight

    mainSlide.style.transform = `translateY(-${activeSlideIndex * height}px)`
    sidebar.style.transform = `translateY(${activeSlideIndex * height}px)`
}