Karuzela odtwarzana automatycznie

Ta karuzela korzysta ze przyciągania do przewijania CSS do tworzenia płynnych, wydajnych przejść między slajdami, które nie powodują przesunięć układu.

Po tej karuzeli można poruszać się na różne sposoby – oprócz elementów sterujących nawigacją obsługuje ona nawigację za pomocą klawiatury i przesuwanie palcem. Aby zmaksymalizować łatwość obsługi i czytelność, po przesunięciu przez użytkownika kursora myszy karuzela przestaje automatycznie poruszać się w jej obszarze.

<div id="carousel">
  <div id="slide-container">
    <div class="slide" data-slideIndex="0">
      <div class="slide-banner">Tour the Empire State Building! <a href="">Buy tickets now.</a></div>
      <img width="1200" height="600" src="./newyork.jpg">
    </div>
    <div class="slide" data-slideIndex="1">
      <div class="slide-banner">Ride the Shinkansen! <a href="">Buy tickets now.</a></div>
      <img width="1200" height="600" src="./tokyo.jpg">
    </div>
    <div class="slide" data-slideIndex="2">
      <div class="slide-banner">Discover relaxation! <a href="">Buy tickets now.</a></div>
      <img width="1200" height="600" src="./beach.jpg">
    </div>
    <div class="slide" data-slideIndex="3">
      <div class="slide-banner">See penguins! <a href="">Buy tickets now.</a></div>
      <img width="1200" height="600" src="./penguins.jpg">
    </div>
    <div class="slide" data-slideIndex="4">
      <div class="slide-banner">Take a ride on the wheel! <a href="">Buy tickets now.</a></div>
      <img width="1200" height="600" src="./wheel.jpg">
    </div>
  </div>
  <div id="back-button" class="arrow back">←</div>
  <div id="forward-button" class="arrow forward">→</div>
  <div class="slide-indicators">
    <div class="slide-indicator active"></div>
    <div class="slide-indicator"></div>
    <div class="slide-indicator"></div>
    <div class="slide-indicator"></div>
    <div class="slide-indicator"></div>
  </div>
</div>

        #carousel {
    max-width: 1200px;
    display: flex;
    flex-direction: column;
    margin: 0 auto;
    position: relative;
}  
.slide-indicators {
    display: flex;
    justify-content: center;
}
.slide-indicator {
    height: 44px;
    width: 50px;
    display: flex;
    justify-items: center;
    cursor: pointer;
}
.slide-indicator:after {
    content: "";
    background-color: #878787;
    height: 10px;
    margin-top: 10px;
    width: 40px;
}
.slide-indicator.active:after,
.slide-indicator:hover:after {
    background-color: #000;
}
.slide-banner {
    background-color: #000;
    color: #fff;
    position: absolute;
    left: 0;
    bottom: 20px;
    padding: 15px;
    font-size: 2.5vw;
}
.slide-banner a {
    color: #fff;
}
#slide-container {
    scroll-snap-type: x mandatory;
    overflow-x: scroll;
    overflow-y: hidden;
    display: flex;
    align-items: center;
    height: 100%;
    gap: 10px;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
}
.slide {
    scroll-snap-align: center;
    position: relative;
    min-width: 100%;
    padding-top: 50%;
}
.slide img {
    height: 100%;
    width: auto;
    position: absolute;
    top: 0;
    left: 0;
}
.arrow {
    color: #fff;
    height: 20px;
    width: 20px;
    background-color: #000;
    position: absolute;
    padding: 10px;
    opacity: .3;
    cursor: pointer;
}
.arrow.back {
    left: 10px;
    top: 10px;
}
.arrow.forward {
    right: 10px;
    top: 10px;
}
.arrow:hover {
    opacity: 1;
}
        

        function autoplayCarousel() {
    const carouselEl = document.getElementById("carousel");
    const slideContainerEl = carouselEl.querySelector("#slide-container");
    const slideEl = carouselEl.querySelector(".slide");
    let slideWidth = slideEl.offsetWidth;
    // Add click handlers
    document.querySelector("#back-button")
        .addEventListener("click", () => navigate("backward"));
    document.querySelector("#forward-button")
        .addEventListener("click", () => navigate("forward"));
    document.querySelectorAll(".slide-indicator")
        .forEach((dot, index) => {
            dot.addEventListener("click", () => navigate(index));
            dot.addEventListener("mouseenter", () => clearInterval(autoplay));
        });
    // Add keyboard handlers
    document.addEventListener('keydown', (e) => {
        if (e.code === 'ArrowLeft') {
            clearInterval(autoplay);
            navigate("backward");
        } else if (e.code === 'ArrowRight') {
            clearInterval(autoplay);
            navigate("forward");
        }
    });
    // Add resize handler
    window.addEventListener('resize', () => {
        slideWidth = slideEl.offsetWidth;
    });
    // Autoplay
    const autoplay = setInterval(() => navigate("forward"), 3000);
    slideContainerEl.addEventListener("mouseenter", () => clearInterval(autoplay));
    // Slide transition
    const getNewScrollPosition = (arg) => {
        const gap = 10;
        const maxScrollLeft = slideContainerEl.scrollWidth - slideWidth;
        if (arg === "forward") {
            const x = slideContainerEl.scrollLeft + slideWidth + gap;
            return x <= maxScrollLeft ? x : 0;
        } else if (arg === "backward") {
            const x = slideContainerEl.scrollLeft - slideWidth - gap;
            return x >= 0 ? x : maxScrollLeft;
        } else if (typeof arg === "number") {
            const x = arg * (slideWidth + gap);
            return x;
        }
    }
    const navigate = (arg) => {
        slideContainerEl.scrollLeft = getNewScrollPosition(arg);
    }
    // Slide indicators
    const slideObserver = new IntersectionObserver((entries, observer) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                const slideIndex = entry.target.dataset.slideindex;
                carouselEl.querySelector('.slide-indicator.active').classList.remove('active');
                carouselEl.querySelectorAll('.slide-indicator')[slideIndex].classList.add('active');
            }
        });
    }, { root: slideContainerEl, threshold: .1 });
    document.querySelectorAll('.slide').forEach((slide) => {
        slideObserver.observe(slide);
    });
}
autoplayCarousel();