背景大小的过渡在Chrome中不起作用



我正在尝试过渡background-sizebackground-color

  • chrome background-size的过渡不起作用
  • Firefox :两者都在工作正常

我也创建了一个小提琴。

.highlight {
  display: block;
  position: relative;
  /*min-height: 800px;*/
  min-height: 200px;
  background-position: center center;
  background-repeat: no-repeat;
  /*padding-top: 200px;*/
  padding-top: 80px;
  /*background-size: cover;*/
}
.highlight:before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, .25);
  content: "";
}
.highlight {
  position: relative;
  height: 200px;
  cursor: pointer;
  background-size: auto 110%;
  background-position: center center;
  -moz-transition: background-size 3s ease;
  -webkit-transition: background-size 3s ease;
  transition: background-size 3s ease;
}
.highlight:hover {
  background-size: auto 130%;
  background-color: rgba(0, 0, 0, 0.4);
  -moz-transition: background-size 3s ease;
  -webkit-transition: background-size 3s ease;
  transition: background-size 3s ease;
}
.highlight:before {
  content: ' ';
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.4);
  -moz-transition: background-color 3s ease;
  -webkit-transition: background-color 3s ease;
  transition: background-color 3s ease;
}
.highlight:hover:before {
  background-color: rgba(0, 0, 0, 0.8);
  -moz-transition: background-color 3s ease;
  -webkit-transition: background-color 3s ease;
  transition: background-color 3s ease;
}
<div class="highlight" style="background-image:url(http://cdn2.stillgalaxy.com/ori/2015/06/06/female-doctors-stock-photos-2331433563559.jpg);">
</div>

有人帮助我吗?还是可以弄清楚这些过渡?

谢谢

不起作用的原因是使用covercontainauto时,background-size不是动画(或至少不应该是)。

mdn 进一步说明:

Animatable :是的,作为可重复的列表,简单的列表,长度,百分比或calc();当两个值都是长度时,它们会插值为长度。当两个值是百分比时,它们被插值为百分比;否则,将两个值转换为一个calc()函数,该函数是长度和百分比(每个可能为零)的总和(每个)函数,并且这些calc()函数每个都将一半插值为实数。这意味着关键字值不是动画

因此,将原始/最终值调整为实际数字(或更正确地提到的长度),您将解决此问题。

您可以使用transform: scale(1.3)transition: all来实现背景大小过渡效果。

更新了小提琴。

注意:我还添加了包装器以隐藏溢出。

.container {
  overflow: hidden;
}
.highlight {
  display: block;
  position: relative;
  /*min-height: 800px;*/
  min-height: 200px;
  background-position: center center;
  background-repeat: no-repeat;
  /*padding-top: 200px;*/
  padding-top: 80px;
  /*background-size: cover;*/
}
.highlight:before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, .25);
  content: "";
}
.highlight {
  position: relative;
  height: 200px;
  cursor: pointer;
  background-size: auto 110%;
  background-position: center center;
  -moz-transition: all 3s ease;
  -webkit-transition: all 3s ease;
  transition: all 3s ease;
}
.highlight:hover {
  transform: scale(1.3);
  background-color: rgba(0, 0, 0, 0.4);
  -moz-transition: all 3s ease;
  -webkit-transition: all 3s ease;
  transition: all 3s ease;
}
.highlight:before {
  content: ' ';
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.4);
  -moz-transition: background-color 3s ease;
  -webkit-transition: background-color 3s ease;
  transition: background-color 3s ease;
}
.highlight:hover:before {
  background-color: rgba(0, 0, 0, 0.8);
  -moz-transition: background-color 3s ease;
  -webkit-transition: background-color 3s ease;
  transition: background-color 3s ease;
}
<div class="container">
  <div class="highlight" style="background-image:url(http://cdn2.stillgalaxy.com/ori/2015/06/06/female-doctors-stock-photos-2331433563559.jpg);">
  </div>
</div>

这是另一个在Chrome&amp;Firefox:

html代码:

<div class="highlight">
    <div class="filter">
    </div>
    <img src="http://cdn2.stillgalaxy.com/ori/2015/06/06/female-doctors-stock-photos-2331433563559.jpg" alt="image" />
</div>

CSS:

.highlight {
  display: block;
  position: relative;
  text-align: center;
  overflow: hidden;
}
.highlight .filter {
    background-color:rgba(0,0,0,0.4);
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 2;
    transition: background-color 3s ease;
}
.highlight:hover > img{
  transform: scale(1.3);
}
.highlight:hover > .filter {
    background-color:rgba(0,0,0,0.8);
}

.highlight img {
  height: 280px;
  transition: transform 3s ease;
}
In background-size you have to give width otherwise it wont work. 
Check this fiddle i have modified your code : 

https://jsfiddle.net/shriharim/26lq1oxx/

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