Question

我正在尝试achieve parallax effect with only CSS在一个无限滚动的页面上，该页面应该具有无缝的重复背景图案。后台的内容将由AJAX加载，因此它的高度取决于加载的内容量。作为示例：

body, html { 
  margin: 0;
  padding:0;
  height: 100%;
}

.wrapper { 
  height: 2000px;
  overflow-x: hidden;
  overflow-y: auto;
  perspective: 1px;
}

.section {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: white;
}

.parallax{
  content: " ";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  transform: translateZ(-1px) scale(2);
  background-size: 100%;
  z-index: -1;
  background-image: url('https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQz56_A2dNoJkPZu3nFpCRn-4NaM9oMsrl1nT0JEjWlbYtkIWg1');
  
   /*height: 100% <-displayed height of the background is not the expected height (full document height) due to the 3D transformations we are applying to the parallax div to achieve the parallax effect*/
  
  /*My approach was setting absurd height for the parrallax div and then think how to cut it, maybe by a wrapper div with overflow hidden...*/
  height: 999999999999999px;
    
}

.content {
  height: 100%;
  width: 400px;
  margin: auto;
  display: flex;
  justify-content: center;
  background: red;
}

/*I also tried wrapping the parallax div with other div to hide by overflow property the background that is below the content div, but parallax effect is lost, or it just behaves the same as if no wrapper were indeed 

.parallax-wrapper{
  overflow-y: hidden; 
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  height: 200px;
}*/

<div class="wrapper">
  

 <div class="section parallax"></div>

  
  <div class="content">
    <h1>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum fermentum venenatis magna, eget hendrerit leo varius vel. Mauris sit amet posuere elit, porta molestie orci. Praesent in vestibulum eros, sit amet aliquam magna. Etiam sed egestas sem, sit amet gravida sapien. Nullam ipsum ligula, ullamcorper ut facilisis vitae, convallis quis ligula. Morbi eleifend tellus mauris, et fermentum nulla semper non. Sed accumsan ultricies ipsum, vestibulum varius est rhoncus quis. Suspendisse nec odio quis magna gravida interdum. Suspendisse in elit tortor. Cras ac nibh sed dolor rhoncus accumsan. Morbi iaculis id mauris quis tristique. Phasellus eleifend purus nec gravida euismod.

</h1>
  </div>
</div>

我希望背景在当前div内容所在的地方结束（滚动滚动会加载更多内容，但这不是这里的问题），而且我不知道该怎么做。问题在于，由于用于实现视差效果的3D CSS效果，视差div的高度将不是屏幕上显示的实际高度，因此很难以某种方式设置该高度来实现我想要的效果。我的方法是设置一个很大的高度，以后再用包装纸和overflow-y: hidden切掉，但那根本不起作用。

Answer 1

用.parallax-wrapper换行的想法很好。我只是做了一些调整。

<div class="wrapper">
  <div class="parallax-wrapper">
   <div class="section parallax"></div>
    <div class="content">...</div>
  </div>
</div>

.wrapper { 
  height: 100vh;
  overflow-x: hidden;
  overflow-y: auto;
  perspective: 1px;
}

.parallax {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  transform: translateZ(-1px) scale(2);
  background-size: 100%;
  z-index: -1;
  background-image: url('https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQz56_A2dNoJkPZu3nFpCRn-4NaM9oMsrl1nT0JEjWlbYtkIWg1');  
}

.content {
  background: red;
  width: 400px;
  margin: auto;
}

.parallax-wrapper{
  position: relative;
  overflow: hidden;   
}

Codepen链接=> https://codepen.io/moorthy-g/pen/OqwYNQ

使用CSS视差效果滚动

1 个答案: