如何在滑动条滑块的边缘上设置幻灯片样式

Question

我正在使用Swiper滑块插件（https://swiperjs.com）。我需要在可见视口的边缘上向幻灯片添加不透明度0.5。 https://i.stack.imgur.com/A6nr5.png

我发现我可以使用此选择器选择正确的幻灯片，并在可见幻灯片的数量发生变化时通过媒体查询对其进行更改：

.swiper-slide-active + * + * + * {
      opacity: 0.5;
}

但是此技巧不适用于左侧的幻灯片。我想不仅有CSS解决方案，而且我必须使用JS来检测可见的幻灯片？

const specialSlider = new Swiper('.special-slider', {
    loop: true,
    speed: 1000,
    slidesPerView: 'auto',
    spaceBetween: 30,
    centeredSlides: true,

    navigation: {
      nextEl: '.special-slider__next',
      prevEl: '.special-slider__prev',
    },
    watchOverflow: true,
    grabCursor: true,

  });

Answer 1

这是我发现的解决方案：

const specialSlider = new Swiper('.special-slider', {
    loop: true,
    speed: 1000,
    slidesPerView: 'auto',
    spaceBetween: 0,
    centeredSlides: true,

    navigation: {
      nextEl: '.special-slider__next',
      prevEl: '.special-slider__prev',
    },
    watchOverflow: true,
    grabCursor: true,

    on: {

      init: makeSlidesTransparent,
      slideChangeTransitionStart: makeSlidesTransparent,
    }

  });

  function makeSlidesTransparent() {

    //Hide old slides
    const oldSlides = d.getAll('.special-slider__item.js-visible');
    for (let i = 0; i < oldSlides.length; i++) {
      oldSlides[i].classList.remove('js-visible')
    }

    const width = window.innerWidth;

    if (width >= 0 && width < 960) {
      //Make visible new slides
      const activeSlide = d.get('.special-slider__item.swiper-slide-active');
      activeSlide.classList.add('js-visible');
    }

    if (width >= 960 && width < 1700) {
      //Make visible new slides
      const activeSlide = d.get('.special-slider__item.swiper-slide-active');
      const prev1 = activeSlide.previousElementSibling;
      const next1 = activeSlide.nextElementSibling;

      prev1.classList.add('js-visible');
      activeSlide.classList.add('js-visible');
      next1.classList.add('js-visible');
    }

    if (width >= 1700) {
      //Make visible new slides
      const activeSlide = d.get('.special-slider__item.swiper-slide-active');
      const prev1 = activeSlide.previousElementSibling;
      const prev2 = prev1.previousElementSibling;
      const next1 = activeSlide.nextElementSibling;
      const next2 = next1.nextElementSibling;

      prev1.classList.add('js-visible');
      prev2.classList.add('js-visible');
      activeSlide.classList.add('js-visible');
      next1.classList.add('js-visible');
      next2.classList.add('js-visible');
    }

  }

和样式：

.special-slider {

  &__item {
    padding-left: 15px;
    padding-right: 15px;
    width: 330px;
    box-sizing: border-box;
    height: auto;
    opacity: 0.5;
    transition: all $transition-style-slow;

    &.js-visible{
      opacity: 1;
    }

    .product-item {
      background-color: rgba(218, 215, 205, 0.2);
    }

  }
}