css - 在 Firefox 中可怕地转换图像 "vibrating"。为什么？

Question

这与我之前问过的一个问题有关，但直到现在我才真正找到问题的根源。

我想要的是一个展开为矩形的圆。它还从 0.9 缩放到 1。

我有的是这个http://codepen.io/StuffieStephie/full/zrZwEQ/我放慢了动画速度，因此“振动”更清晰。

    #seasonOne .test {
    padding:0;
        background-color: #fff;
    background: #fff url('http://i296.photobucket.com/albums/mm174/StuffieStephie/S1ChibiPreview2_zpsswyamase.png') 50% 50% no-repeat;
width: 200px;
height: 200px;
    border-radius: 50%;
    display: block;
        margin: 0 auto;
    -webkit-transition: 2s;
            -moz-transition: 2s;
            transition: 2s;
    -webkit-transform: scale(.9);
        -ms-transform: scale(.9);
        -moz-transform: scale(.9);
            transform: scale(.9);
    font-size: 0;
    -webkit-transform-origin: 50% 50%;
    -moz-transform-origin: 50% 50%;
        -ms-transform-origin: 50% 50%;
            transform-origin: 50% 50%;

}

#seasonOne:hover .test {
-webkit-transform: scale(1);
    -ms-transform: scale(1);
     -moz-transform: scale(1);
        transform: scale(1);
    width: 250px;
    height: 200px;

    border-radius: 0;
}

为什么只有在 Firefox 中才会这样晃动？添加供应商前缀没有帮助...

Answer 1

首先，原因几乎是背景图片。所有浏览器在尝试为两个方向的大小和位置设置动画时都会有点卡顿，只是 Firefox 丢掉的帧数最少^{(开枪了？)}。如果不知道你正在制作的动画是什么，就很难流畅地制作动画(原因是像 GSAP 这样的 js 库和它们一样好)。因此，您想要做的是 a) 一次只做一个或 b) 通过仅在图像本身上设置动画大小来“伪造”它，然后将动画的其余部分放在图像周围的框架上。

因为图像是居中的，我们完全可以做B:

.season img {
  float: left;
  max-width: 500px;
  width: 100%;
  animation-delay:0.1s; 
}

.season p.oneP {
  animation-delay:0.5s; 
}

.season p.twoP {
  animation-delay:0.75s; 
}
.season p.threeP {
  animation-delay:1s; 
}
.season h2 {
  border-radius: 10px 10px 0 0;
  background-color: #eee;
  padding: 3px;
  margin-top: 0;
  overflow-x: hidden;
}
.season .smallText {
  animation-delay:0.2s; 
  overflow: hidden;
}
.season h6, .season .arts, .season h3 {
  text-align: center !important;
  animation-delay: 1.8s;
}
.next, .prev {
  float: right;
  box-sizing: border-box;
  width: 49%;
  animation-delay: 3s;
  border: 3px solid #EEE;
  border-radius: 15px;
}
.prev {
  float: left;
}
.prev img.preview, .next img.preview {
  float: left;
}
.previews {
  display: -webkit-flex; /* Safari */
  -webkit-justify-content: space-around; /* Safari 6.1+ */
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}
.card{
  color: #ff2772;
  border-radius: 15px;
  margin: 3px 1px;
  background-color: #2d3034;
  box-sizing: border-box;
  width: 300px;
  min-height: 400px;
  display: inline-block;
  transition: .25s;
  cursor:pointer;
  border: 1px solid #ff2772;
  text-align: center;
}
.floatRight {
  float: right;
  margin-right: 10px;

}
#page-content .card h6 {
  padding: 10px 2px;
  background: none;
  border-radius: 10px 10px 0 0;
  transition: .3s;

  border-bottom: 1px solid #fff;
}


#page-content .card .smallText {
  transition: .3s;
  background: none;
  border-bottom: 1px solid #fff;
  border-top: 1px solid #fff;
}

#page-content .card:hover .smallText, #page-content .card:hover h6{
  background-color: #ff2772;
  color: #2d3034;
}
.card:hover{
  background: #fff;
}

/*
.card img {
width: 200px;
text-align: center;
border-radius: 100%;
background: #fff;
margin: 0 auto;
display: block;
transform: scale(.9);
transition: all .2s ease-in-out;
}
/*.card .test {
transform: scale(.9);
width: 200px;
height: 200px;
overflow-x: hidden;
display: block;
margin: 0 auto;
}
*/




.imgwrapper {
  position:relative;
  width:100%;
  height:200px;
  margin:0;
  padding:0;
  overflow:hidden;
}
#seasonOne .test {
  padding:0;
  background-color:rgba(0,0,0,0);
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border-style:solid;
  border-color: #2d3034;
  border-width:80px;
  display: block;
  transition:all 2s, border-color 0.25s;
  transform: scale(.9);
  font-size: 0;  
  position:absolute;
  z-index: 1;
  top:-80px;
  left:-30px;
}
#seasonOne .img{
  background: #fff url('http://i296.photobucket.com/albums/mm174/StuffieStephie/S1ChibiPreview2_zpsswyamase.png') 50% 50% no-repeat;
  /*Was gonna make that a dataURI, but that's 112KB. Heh.*/
  width:250px;
  height:200px;
  transition: 2s;
  transform: scale(.9);
  position:absolute;
  left:25px;
}

#seasonOne:hover .test {
  width: 250px;
  height: 200px;
  transform: scale(1);
  border-radius: 0;
  border-color:#fff;
  left:-55px;
}
#seasonOne:hover .img{
  transform: scale(1);
}



.card:hover img{
  transform: scale(1);
  border-radius: 0;
}


hr {
  margin: 0;
  padding: 0;
}
img.preview {
  transform: scale(.9);
  width: 200px;
  display: inline;
  float: none;
  border-radius: 10px;
  transition: all .2s ease-in-out;
  box-shadow: 0 1px 1px rgba(0,0,0,0.3);
  border-radius: 10px;
  line-height: 0;
  font-size: 0;
}
.art img.preview:nth-child(1) {
  animation-delay: 2s;
}
.art img.preview:nth-child(2) {
  animation-delay: 2.25s;
}

.logo{
  clear:left;
  padding-bottom: 10px;
}
img.preview:hover {
  transform: scale(1);
  box-shadow: 0 15px 15px rgba(0,0,0,0.3);
  border-radius: 0;
}
.season img.no-float {
  float: none;
}
@media screen and (max-width: 1200px) {
  .season h6 {
    clear: both;
  }
}
@media screen and (max-width: 800px) {	
  .prev img.preview, .next img.preview {
    float: left;
  }

  .season p {
    clear: both;
  }
  .prev p, .next p {
    clear: none;
  }
  .season img{
    float: none;
    margin: 0 auto;
    text-align: center;
  }
}
@media screen and (max-width: 750px) {	
  .card {
    /*width: 49%;/*For this part to work, you'll have to do up more rules
     *, otherwise you'll get an off-center image.*/
    box-sizing: border-box;
  }
}
@media screen and (max-width: 600px) {

  .prev, .next{
    width: 100%;
    float: none;
    margin: 5px auto;
  }
  .prev img.preview, .next img.preview {
  }
}
@media screen and (max-width: 399px) {
  .card{
    width: 100%;
  }
}

<!doctype html>
<html>
    <head>
        <!-- Meta -->
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
        <meta name="viewport" content="initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,width=device-width,user-scalable=no" />
        <!-- Styles -->
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.4.0/css/font-awesome.css">
        <link rel="stylesheet" href="http://cdn.jsdelivr.net/animatecss/2.1.0/animate.min.css">
        <!-- Magnific Popup core CSS file -->
        <link href='http://fonts.googleapis.com/css?family=Quicksand:700|Montserrat:700|Open+Sans|Sniglet:400,800' rel='stylesheet' type='text/css'>
        <link rel="stylesheet" href="http://kamicon.net/assets/styles/mainStyles.css">
        <link rel="stylesheet" 
        <!--[if lt IE 9]><script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script><![endif]-->
    </head>
    <body>
        <div id="site-canvas">
            <div id="page-content">
                <section>
                    <h1>Help Me!</h1>
                    <p>The art shakes horribly when you hover over it in Firefox Why!?</p>
                    <div id="area" class="holder"></div>
                    <div class="previews">
                        <div id="seasonOne" class="card seasonOne">
                            <h6 class="center">Season 1 (2009) - The Pilot</h6>
                            <div class="imgwrapper">
                                <div class="img"></div>
                                <div class="test"></div>
                                <div class="wrapper2"></div>
                            </div>
                            <p class="animated smallText fadeInRight oneP">Ut cursus purus in lacinia tincidunt. Quisque lorem odio, posuere ut aliquam vel, fringilla at enim. Duis ligula lacus, viverra et sapien rhoncus, commodo euismod ipsum.</p>
                            <a href="#area" class="button">Read More</a>
                        </div>
                    </div>
                    <hr/>
                </section>
            </div>
            <!-- #page-content -->
        </div>
        <!-- #site-canvas -->
        <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
    </body>
</html>

或者在 codepen .

我将框架(.test 静止)和图像(.img)分开，两者都包含在包装器(.imgwrapper)中.

包装器处理页面布局中的足迹。

框架的边框颜色现在特别地与卡片的背景一起动画，并且定位(和 border-width'd)相当hackishly ....看看我是怎么做到的，你就会明白我的意思。呵呵。

图片现在具有固定的宽度和位置，只有动画比例(因此，不再卡顿)。

我 90% 确定有更好的方法来做到这一点，但是因为我必须对图像进行绝对定位(因此它的位置不会在框架移动时抽动)，所以我无法保留 image-div作为 frame-div 的子项。

另外，令我惊讶的是生成一个内 Angular 为圆 Angular 的正方形如此笨拙。我基本上只是做了一个非常粗的圆圈，然后说“只显示它的这个正方形”。

编辑注意:@media 宽度低于 750px 的调整大小导致偏心。禁用它“修复”它。把固定代码移到这里才发现，呵呵。