同时应用两个不同的CSS转换 [英] Apply two different CSS transforms simultanesouly

问题描述

我正在研究一个脚本，该脚本基于光标位置使用向左和向右变换来调整图像.
还有一些CSS可以将鼠标悬停在图片上.

I am working on a script to adjust an image using transform left and right based on the cursor position.
There is also some CSS to zoom the image on hover.

// JavaScript source code
var catchX = 0,
    catchY = 0,
    x = 0,
    y = 0,
    burn = 1 / 28;

function imageWatch() {
    x += (catchX - x) * burn;

    translate = 'translate(' + x + 'px, ' + y + 'px)';

    $('.image-area img').css({
        '-webit-transform': translate,
        '-moz-transform': translate,
        'transform': translate
    });

    window.requestAnimationFrame(imageWatch);
}

$(window).on('mousemove click', function (e) {

    var mouseX = Math.max(-100, Math.min(100, $(window).width() / 2 - e.clientX));
    catchX = (26 * mouseX) / 100;

});

imageWatch();
     

html,body { height:100%}
body {margin: 0; padding: 0;}
*, *::before, *::after {
  content:"\0020";
  box-sizing: border-box;
}
.poster {
  display: inline-block;
  width: 32vw;
  height: 100vh;
  position:relative;
  overflow:hidden !important
}
 .image-area {
            position: absolute;
            width: 100%;
            height: 100vh;
            opacity: .24;
            transition: 2.5s ease;
        }

.image-area {
            opacity: 1;
        }


.image-area > img {
            margin-top: -312px;
            margin-left: -913px;
            width: auto;
            /* height: auto */
            height: 1000px;
            transform: scale(1,1);
            transition:8s all;
        }

.poster:hover .image-area > img {
            transform: scale(1.3,1.3)
        }
        
        

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="poster">
    <div class="image-area">
         <img class="poster" src="https://vignette1.wikia.nocookie.net/logopedia/images/f/fc/Sky_Believe_in_better_logo.jpg/revision/latest?cb=20110910152552" alt="Sky" />
    </div>
</div>

<div class="poster">
    <div class="image-area">
         <img class="poster" src="https://vignette1.wikia.nocookie.net/logopedia/images/f/fc/Sky_Believe_in_better_logo.jpg/revision/latest?cb=20110910152552" alt="Sky" />
    </div>
</div>

<div class="poster">
    <div class="image-area">
         <img class="poster" src="https://vignette1.wikia.nocookie.net/logopedia/images/f/fc/Sky_Believe_in_better_logo.jpg/revision/latest?cb=20110910152552" alt="Sky" />
    </div>
</div>
   

我的JS使用的是transform属性，我的CSS也使用它来使鼠标悬停缩放.我认为这是问题所在.

My JS is using the transform property, and so is my CSS to make it zoom on hover. I think this is the problem.

如果您从CSS中删除了转换，则脚本可以正常工作，但是我需要 transition:8s all ，图像才能在鼠标悬停时进行缩放，并使其与光标对齐.

If you remove the transform from the CSS, the script works fine, but I need the transition:8s all for the image to zoom on hover, as well as to align it with the cursor.

此 SO 告诉我，您可以拥有两个转换属性但它们必须在一条线上.我该如何使用Javascript做到这一点?

This S.O informed me that you can have two transform properties but they must be on one line. How do I do that with my Javascript?

jsFiddle

推荐答案

transform 是一个属性，因此您不能仅以CSS为目标，例如，不能为两个CSS设置不同的 transition-duration 在同一 transform中应用的变换功能属性.

transform is a single property, so you can't target from CSS for only part of it, e.g, you cannot set different CSS transition-duration for two transform-functions applied in the same transform property.

您可以通过js编写所有内容，并随着时间的推移更新两个变换函数的值，但这需要大量的工作，以实现潜在的非硬件加速结果，并且有一个简单的解决方法.

You could write everything through js, updating yourself both transform-functions values over time, but that would be a lot of work, for a potentially non-hardware accelerated result, while there is a simple workaround.

最简单的解决方案是更改您的结构，以便将 scale 应用于包装器元素，并将平移应用于内部元素.

The easiest solution is to change a little bit your structure so that you apply the scale on a wrapper element, and the translate on the inner-one.

通过这种方式，这两种转换都将应用到您内部的< img> 上，但是它们不会相互冲突.

This way, both transforms are applied on your inner <img>, but they don't conflict each other.

// JavaScript source code
var catchX = 0,
  catchY = 0,
  x = 0,
  y = 0,
  burn = 1 / 28;

function imageWatch() {
  x += (catchX - x) * burn;

  translate = 'translate(' + x + 'px, ' + y + 'px)';

  $('.image-area img').css({
    '-webit-transform': translate,
    '-moz-transform': translate,
    'transform': translate
  });

  window.requestAnimationFrame(imageWatch);
}

$(window).on('mousemove click', function(e) {

  var mouseX = Math.max(-100, Math.min(100, $(window).width() / 2 - e.clientX));
  catchX = (26 * mouseX) / 100;

});

imageWatch();

html,
body {
  height: 100%
}

body {
  margin: 0;
  padding: 0;
}

*,
*::before,
*::after {
  content: "\0020";
  box-sizing: border-box;
}

.poster {
  display: inline-block;
  width: 32vw;
  height: 100vh;
  position: relative;
  overflow: hidden !important
}

.image-area {
  position: absolute;
  width: 100%;
  height: 100vh;
  opacity: .24;
  transition: 2.5s ease;
}

.image-area {
  opacity: 1;
}

.image-area img {
  margin-top: -312px;
  margin-left: -913px;
  width: auto;
  /* height: auto */
  height: 1000px;
 /* here we can remove the transition */
}


/* scaling on hover is only applied on the parent elmt */

.image-area>.scaler {
  transform: scale(1, 1);
  transition: 8s transform;
}

.poster:hover .image-area>.scaler {
  transform: scale(1.3, 1.3);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="poster">
  <div class="image-area">
    <!-- the scaling wrapper-->
    <div class="scaler">
      <img class="poster" src="https://vignette1.wikia.nocookie.net/logopedia/images/f/fc/Sky_Believe_in_better_logo.jpg/revision/latest?cb=20110910152552" alt="Sky" />
    </div>
  </div>
</div>

<div class="poster">
  <div class="image-area">
    <!-- the scaling wrapper-->
    <div class="scaler">
      <img class="poster" src="https://vignette1.wikia.nocookie.net/logopedia/images/f/fc/Sky_Believe_in_better_logo.jpg/revision/latest?cb=20110910152552" alt="Sky" />
    </div>
  </div>
</div>

<div class="poster">
  <div class="image-area">
    <!-- the scaling wrapper-->
    <div class="scaler">
      <img class="poster" src="https://vignette1.wikia.nocookie.net/logopedia/images/f/fc/Sky_Believe_in_better_logo.jpg/revision/latest?cb=20110910152552" alt="Sky" />
    </div>
  </div>
</div>

这篇关于同时应用两个不同的CSS转换的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！