如何在屏幕上可见 div 应用视差滚动

Question

我有多个 div 里面有图片。我想将视差应用于 div 内的图像。但是，如果我将视差滚动设置为图像，则屏幕底部的图像会在 div 内变成白色 space，因为图像向上滚动到高处。

到目前为止，这是我的代码。

HTML

  <div class="workImg">
    <img class="inWorkImg" src="img/08.png"/>
  </div>

  <div class="workImg">
    <img class="inWorkImg" src="img/09.png"/>
  </div>

  <div class="workImg">
    <img class="inWorkImg" src="img/10.png"/>
  </div>

  <div class="workImg">
    <img class="inWorkImg" src="img/11.png"/>
  </div>

CSS

.workImg{
 position: absolute;
  width: 80%;
  height: 230px;
  bottom: 15px;
  overflow: hidden;
}

.inWorkImg {
  object-fit: cover;
  height: 110%;
}

JQUERY

var parallaxElements = $('.inWorkImg'),
  parallaxQuantity = parallaxElements.length;
var visible = isInViewport(this)


$(window).on('scroll', function () {

  if(visible) {

    window.requestAnimationFrame(function () {

      for (var i = 0; i < parallaxQuantity; i++) {
        var currentElement = parallaxElements.eq(i);
        var scrolled = $(window).scrollTop();

        currentElement.css({
          'transform': 'translate3d(0,' + scrolled * -0.06 + 'px, 0)'
        });

      }

    });
  }

});

Answer 1

实际上你不必为此使用 jQuery，而是像那样使用纯 css -

而不是 img 标签，这些 div 将得到一个 background-image 属性.

 <div class="workImg1"></div>
 <div class="workImg2"></div>
 <div class="workImg3"></div>
 <div class="workImg4"></div>

而 CSS 看起来像那样 -

.workImg1, .workImg2, .workImg3, .workImg4 {
      /* Set a specific height */
      min-height: 500px; 

      /* Create the parallax scrolling effect */
      background-attachment: fixed;
      background-position: center;
      background-repeat: no-repeat;
      background-size: cover;
}
.workImg1 {
          /* The image used */
          background-image: url("IMG_URL");
}
.workImg2 {
          /* The image used */
          background-image: url("IMG_URL");
}
.workImg3 {
          /* The image used */
          background-image: url("IMG_URL");
}
.workImg4 {
          /* The image used */
          background-image: url("IMG_URL");
}

如何在屏幕上可见 div 应用视差滚动

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