在渐变背景中使用CSS3过渡

215

我试图在css上的缩略图上进行悬停过渡，以便在悬停时背景渐变消失。过渡不起作用，但是如果我简单地将其更改为一个rgba()值，则可以正常工作。不支持渐变吗？我也尝试过使用图像，它也不会转换图像。

我知道这是有可能的，就像在另一篇文章中有人做的那样，但我不知道具体如何。任何帮助>以下是一些可使用的CSS：

#container div a {
  -webkit-transition: background 0.2s linear;
  -moz-transition: background 0.2s linear;
  -o-transition: background 0.2s linear;
  transition: background 0.2s linear;
  position: absolute;
  width: 200px;
  height: 150px;
  border: 1px #000 solid;
  margin: 30px;
  z-index: 2
}

#container div a:hover {
  background: -webkit-gradient(radial, 100 75, 100, 100 75, 0, from(rgba(0, 0, 0, .7)), to(rgba(0, 0, 0, .4)))
}
css  gradient  css-transitions 
— alt
source
5
IE10现在支持渐变过渡-这是一个惊喜！
— sirmdawg 2013年
@mkprogramming，哇，它确实不错，看起来很棒！这是一个演示（适用于IE10 +）。希望其他浏览器也能获得对这些很棒的东西的支持。
— Qtax
该网站是对我有用
— Tom Hagen

Answers:

173

渐变尚不支持过渡（尽管当前规范说，它们应支持渐变，例如通过插值进行渐变过渡）。

如果要使用背景渐变的淡入效果，则必须在容器元素上设置不透明度，然后对不透明度进行“过渡”。

（有一些浏览器版本支持渐变过渡（例如IE10。我在2016年在IE中测试了渐变过渡，当时似乎可以使用，但我的测试代码不再可用。）

更新：2018年10月 使用无前缀的新语法[例如：radial-gradient（...）]的渐变过渡现已确认可以在Microsoft Edge 17.17134上正常运行（再次？）。我不知道何时添加。仍无法在最新的Firefox和Chrome / Windows 10上运行。

— 迈克尔·穆兰尼
source
1
而且，梯度规范尚未完成，当前的梯度规范开发已经远离当前的-webkit-gradient实现。
— c-smile
1
但是边缘webkit浏览器现在支持新的mozilla-heritage渐变规范以及较旧的webkit语法。令人困惑的是，它们都是-webkit前缀
— Michael Mullany 2011年
3
IE10完全支持渐变过渡。
— Niet the Dark Absol 2013年
2
— Dave Lunny 2015年
2
您现在可以添加有关使用渐变过渡的演示吗？我似乎无法根据您的回答找出答案（也找不到其他有关它的消息）。我听到的最后一个内容是，您无法在两个背景图像之间切换，这就是渐变。
— Mackenzie McClane
98

一种解决方法是转换背景位置，以产生渐变变化的效果：http : //sapphion.com/2011/10/css3-gradient-transition-with-background-position/

具有背景位置的CSS3渐变过渡

尽管您不能使用CSS transition属性直接为渐变设置动画，但可以为background-position属性设置动画以实现简单的渐变动画：

此代码非常简单：

#DemoGradient{  
    background: -webkit-linear-gradient(#C7D3DC,#5B798E);  
    background: -moz-linear-gradient(#C7D3DC,#5B798E);  
    background: -o-linear-gradient(#C7D3DC,#5B798E);  
    background: linear-gradient(#C7D3DC,#5B798E);  
  
    -webkit-transition: background 1s ease-out;  
    -moz-transition: background 1s ease-out;  
    -o-transition: background 1s ease-out;  
    transition: background 1s ease-out;  
  
    background-size:1px 200px;  
    border-radius: 10px;  
    border: 1px solid #839DB0;  
    cursor:pointer;  
    width: 150px;  
    height: 100px;  
}  
#DemoGradient:Hover{  
    background-position:100px;  
}  
<div id="DemoGradient"></div>
展开摘要

— 艾伦
source
31

一种解决方案是使用背景位置来模仿渐变过渡。 几个月前，该解决方案已在Twitter Bootstrap中使用。

更新资料

http://codersblock.blogspot.fr/2013/12/gradient-animation-trick.html?showComment=1390287622614

这是一个简单的示例：

链接状态

 .btn {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 12px;
  font-weight: 300;
  position: relative;
  display: inline-block;
  text-decoration: none;
  color: #fff;
  padding: 20px 40px;
  background-image: -moz-linear-gradient(top, #50abdf, #1f78aa);
  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#50abdf), to(#1f78aa));
  background-image: -webkit-linear-gradient(top, #50abdf, #1f78aa);
  background-image: -o-linear-gradient(top, #50abdf, #1f78aa);
  background-image: linear-gradient(to bottom, #50abdf, #1f78aa);
  background-repeat: repeat-x;
  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff50abdf', endColorstr='#ff1f78aa', GradientType=0);
  background-repeat: repeat-y;
  background-size: 100% 90px;
  background-position: 0 -30px;
  -webkit-transition: all 0.2s linear;
     -moz-transition: all 0.2s linear;
       -o-transition: all 0.2s linear;
          transition: all 0.2s linear;
}

悬停状态

.btn:hover {
   background-position: 0 0;
}
— 文策拉维
source
1
在编辑之前，您的答案是适当的。现在，它根本不是一个答案，而仅仅是您网站的链接。我正在将您的答复恢复为原始答复。
— Andrew Barber
好的，没问题。只需进行一些小的更改。
— vinzcelavi 2013年
2
这是一个小提琴：jsfiddle.net/Volker_E/RksTV关键是property background-size，您不能在IE8中使用它。caniuse.com/#search=background-size 除此之外，这是一个不错的解决方案。
— Volker E.
11

对于它的价值，这里有一个Sass mixin：

用法：

@include gradientAnimation(red, blue, .6s);

混合：

@mixin gradientAnimation( $start, $end, $transTime ){
    background-size: 100%;
    background-image: linear-gradient($start, $end);
    position: relative;
    z-index: 100;
    &:before {
        background-image: linear-gradient($end, $start);
        content: "";
        display: block;
        height: 100%;
        position: absolute;
        top: 0; left: 0;
        opacity: 0;
        width: 100%;
        z-index: -100;
        transition: opacity $transTime;
    }
    &:hover {
        &:before {
            opacity: 1;
        }
    }
}

摘自Dave Lunny在Medium上的一篇很棒的文章：https：//medium.com/@dave_lunny/animating-css-gradients-using-only-css-d2fd7671e759

— 里卡多·泽（Ricardo Zea）
source
1
关于Medium的帖子非常有用，感谢您添加它
— Gendrith
9

我知道这是一个古老的问题，但是让人们喜欢我在纯CSS中的解决方案。渐变从左到右淡入淡出。

.contener{
  background-image:url('http://www.imgbase.info/images/safe-wallpapers/digital_art/3d_landscape/9655_3d_landscape.jpg');   width:300px;
  height:200px;
  background-size:cover;
  border:solid 2px black;
}
.ed {
    width: 0px;
    height: 200px;
    background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.75));
    position: relative;
    opacity:0;
    transition:width 20s, opacity 0.6s;
}

.contener:hover .ed{
    width: 300px;
    background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.75));
    position: relative;
    opacity:1;
    transition:width 0.4s, opacity 1.1s;
    transition-delay: width 2s;
    
    animation-name: gradient-fade;
    animation-duration: 1.1s;   
    -webkit-animation-name: gradient-fade; /* Chrome, Safari, Opera */
    -webkit-animation-duration: 1.1s; /* Chrome, Safari, Opera */
}




/* ANIMATION */
@-webkit-keyframes gradient-fade {
    0%   {background:linear-gradient(to right, rgba(0,0,255,0), rgba(255,0,0,0));}
    2%  {background:linear-gradient(to right, rgba(0,0,255,0.01875), rgba(255,0,0,0));}
    4%  {background:linear-gradient(to right, rgba(0,0,255,0.0375), rgba(255,0,0,0.0));}
    6%  {background:linear-gradient(to right, rgba(0,0,255,0.05625), rgba(255,0,0,0.0));}
    8% {background:linear-gradient(to right, rgba(0,0,255,0.075), rgba(255,0,0,0));}
    10%  {background:linear-gradient(to right, rgba(0,0,255,0.09375), rgba(255,0,0,0));}
    12%   {background:linear-gradient(to right, rgba(0,0,255,0.1125), rgba(255,0,0,0));}
    14%  {background:linear-gradient(to right, rgba(0,0,255,0.13125), rgba(255,0,0,0));}
    16%  {background:linear-gradient(to right, rgba(0,0,255,0.15), rgba(255,0,0,0));}
    18%  {background:linear-gradient(to right, rgba(0,0,255,0.16875), rgba(255,0,0,0));}
    20% {background:linear-gradient(to right, rgba(0,0,255,0.1875), rgba(255,0,0,0));}
    22%  {background:linear-gradient(to right, rgba(0,0,255,0.20625), rgba(255,0,0,0.01875));}
    24%   {background:linear-gradient(to right, rgba(0,0,255,0.225), rgba(255,0,0,0.0375));}
    26%  {background:linear-gradient(to right, rgba(0,0,255,0.24375), rgba(255,0,0,0.05625));}
    28%  {background:linear-gradient(to right, rgba(0,0,255,0.2625), rgba(255,0,0,0.075));}
    30%  {background:linear-gradient(to right, rgba(0,0,255,0.28125), rgba(255,0,0,0.09375));}
    32% {background:linear-gradient(to right, rgba(0,0,255,0.3), rgba(255,0,0,0.1125));}
    34%  {background:linear-gradient(to right, rgba(0,0,255,0.31875), rgba(255,0,0,0.13125));}
    36%   {background:linear-gradient(to right, rgba(0,0,255,0.3375), rgba(255,0,0,0.15));}
    38%  {background:linear-gradient(to right, rgba(0,0,255,0.35625), rgba(255,0,0,0.16875));}
    40%  {background:linear-gradient(to right, rgba(0,0,255,0.375), rgba(255,0,0,0.1875));}
    42%  {background:linear-gradient(to right, rgba(0,0,255,0.39375), rgba(255,0,0,0.20625));}
    44% {background:linear-gradient(to right, rgba(0,0,255,0.4125), rgba(255,0,0,0.225));}
    46%  {background:linear-gradient(to right, rgba(0,0,255,0.43125),rgba(255,0,0,0.24375));}
    48%   {background:linear-gradient(to right, rgba(0,0,255,0.45), rgba(255,0,0,0.2625));}
    50%  {background:linear-gradient(to right, rgba(0,0,255,0.46875), rgba(255,0,0,0.28125));}
    52%  {background:linear-gradient(to right, rgba(0,0,255,0.4875), rgba(255,0,0,0.3));}
    54%   {background:linear-gradient(to right, rgba(0,0,255,0.50625), rgba(255,0,0,0.31875));}
    56%  {background:linear-gradient(to right, rgba(0,0,255,0.525), rgba(255,0,0,0.3375));}
    58%  {background:linear-gradient(to right, rgba(0,0,255,0.54375), rgba(255,0,0,0.35625));}
    60%  {background:linear-gradient(to right, rgba(0,0,255,0.5625), rgba(255,0,0,0.375));}
    62% {background:linear-gradient(to right, rgba(0,0,255,0.58125), rgba(255,0,0,0.39375));}
    64%  {background:linear-gradient(to right,rgba(0,0,255,0.6), rgba(255,0,0,0.4125));}
    66%   {background:linear-gradient(to right, rgba(0,0,255,0.61875), rgba(255,0,0,0.43125));}
    68%  {background:linear-gradient(to right, rgba(0,0,255,0.6375), rgba(255,0,0,0.45));}
    70%  {background:linear-gradient(to right, rgba(0,0,255,0.65625), rgba(255,0,0,0.46875));}
    72%  {background:linear-gradient(to right, rgba(0,0,255,0.675), rgba(255,0,0,0.4875));}
    74% {background:linear-gradient(to right, rgba(0,0,255,0.69375), rgba(255,0,0,0.50625));}
    76%  {background:linear-gradient(to right, rgba(0,0,255,0.7125), rgba(255,0,0,0.525));}
    78%   {background:linear-gradient(to right, rgba(0,0,255,0.73125),,rgba(255,0,0,0.54375));}
    80%  {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.5625));}
    82%  {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.58125));}
    84%  {background:linear-gradient(to right, rgba(0,0,255,0.75),rgba(255,0,0,0.6));}
    86% {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.61875));}
    88%  {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.6375));}
    90%   {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.65625));}
    92%  {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.675));}
    94%  {background:linear-gradient(to right, rgba(0,0,255,0.75),rgba(255,0,0,0.69375));}
    96%  {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.7125));}
    98% {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.73125),);}
    100%  {background:linear-gradient(to right, rgba(0,0,255,0.75), rgba(255,0,0,0.75));}
}
<div class="contener" style="">
  <div class="ed"></div>
</div>
展开摘要

— Skylin R
source
3

在下面，anchor标签具有一个孩子和一个孙子。孙子具有较远的背景渐变。靠近背景的孩子是透明的，但要过渡到渐变。悬停时，孩子的不透明度会在1秒的时间内从0变为1。

这是CSS：

.bkgrndfar {
  position:absolute;
  top:0;
  left:0;
  z-index:-2;
  height:100%;
  width:100%;
  background:linear-gradient(#eee, #aaa);
}

.bkgrndnear {
  position:absolute;
  top:0;
  left:0;
  height:100%;
  width:100%;
  background:radial-gradient(at 50% 50%, blue 1%, aqua 100%);
  opacity:0;
  transition: opacity 1s;
}

a.menulnk {
  position:relative;
  text-decoration:none;
  color:#333;
  padding: 0 20px;
  text-align:center;
  line-height:27px;
  float:left;
}

a.menulnk:hover {
  color:#eee;
  text-decoration:underline;
}

/* This transitions child opacity on parent hover */
a.menulnk:hover .bkgrndnear {
  opacity:1;
}

而且，这是HTML：

<a href="#" class="menulnk">Transgradient
<div class="bkgrndfar">
  <div class="bkgrndnear">
  </div>
</div>
</a>

以上内容仅在最新版本的Chrome中经过测试。这些是悬停前，悬停中途和完全过渡的悬停图像：

之前 半 后

— 保罗·Q
source
3

渐变过渡的部分解决方法是使用插入框阴影-您可以转换框阴影本身或背景颜色-例如，如果您创建与背景颜色相同的插入框阴影，而不是对背景颜色使用过渡，则会产生幻觉普通的背景变成了径向渐变

.button SPAN {
    padding: 10px 30px; 
    border: 1px solid ##009CC5;

    -moz-box-shadow: inset 0 0 20px 1px #00a7d1;
    -webkit-box-shadow: inset 0 0 20px 1px#00a7d1;
    box-shadow: inset 0 0 20px 1px #00a7d1; 

    background-color: #00a7d1;
    -webkit-transition: background-color 0.5s linear;
    -moz-transition: background-color 0.5s linear;
    -o-transition: background-color 0.5s linear;
    transition: background-color 0.5s linear;
}

.button SPAN:hover {
    background-color: #00c5f7; 
}
— Frantisek Were布斯卡
source
1
巧妙的解决方案，嵌入阴影可以完美地创建渐变错觉
— Aziz 2015年
2

在codepen上发现了一个不错的技巧，该技巧修改了opacity属性，但通过利用伪元素实现了从一个渐变到另一个渐变的渐变。他所做的是设置一个值，:after以便当您更改实际元素的不透明度时，该:after元素会显示出来，因此看起来好像是淡入淡出。认为分享会很有用。

原始Codepen：http：//codepen.io/sashtown/pen/DfdHh

.button {
  display: inline-block;
  margin-top: 10%;
  padding: 1em 2em;
  font-size: 2em;
  color: #fff;
  font-family: arial, sans-serif;
  text-decoration: none;
  border-radius: 0.3em;
  position: relative;
  background-color: #ccc;
  background-image: linear-gradient(to top, #6d8aa0, #8ba2b4);
  -webkit-backface-visibility: hidden;
  z-index: 1;
}
.button:after {
  position: absolute;
  content: '';
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 0.3em;
  background-image: linear-gradient(to top, #ca5f5e, #d68584);
  transition: opacity 0.5s ease-out;
  z-index: 2;
  opacity: 0;
}
.button:hover:after {
  opacity: 1;
}
.button span {
  position: relative;
  z-index: 3;
}
body {
  text-align: center;
  background: #ddd;
}
<a class="button" href="#"><span>BUTTON</span></a>
展开摘要

— 八月
source
2

根据您问题中的CSS代码，我尝试了以下代码，它对我有用（运行代码片段），请您自己尝试：

#container div a {
  display: inline-block;
  margin-top: 10%;
  padding: 1em 2em;
  font-size: 2em;
  color: #fff;
  font-family: arial, sans-serif;
  text-decoration: none;
  border-radius: 0.3em;
  position: relative;
  background-color: #ccc;
  background-image: linear-gradient(to top, #C0357E, #EE5840);
  -webkit-backface-visibility: hidden;
  z-index: 1;
}
     
#container div a:after {
  position: absolute;
  content: '';
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 0.3em;
  background-image: linear-gradient(to top, #6d8aa0, #343436);
  transition: opacity 0.5s ease-out;
  z-index: 2;
  opacity: 0;
}
    
#container div a:hover:after {
  opacity: 1;
}
#container div a span {
  position: relative;
  z-index: 3;
}
<div id="container"><div><a href="#"><span>Press Me</span></a></div></div>
展开摘要

根据您问题中的CSS代码，我尝试了如下代码，它对我有用，请您自己尝试：

    #container div a {
  display: inline-block;
  margin-top: 10%;
  padding: 1em 2em;
  font-size: 2em;
  color: #fff;
  font-family: arial, sans-serif;
  text-decoration: none;
  border-radius: 0.3em;
  position: relative;
  background-color: #ccc;
  background-image: linear-gradient(to top, #C0357E, #EE5840);
  -webkit-backface-visibility: hidden;
  z-index: 1;
}

#container div a:after {
  position: absolute;
  content: '';
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 0.3em;
  background-image: linear-gradient(to top, #6d8aa0, #343436);
  transition: opacity 0.5s ease-out;
  z-index: 2;
  opacity: 0;
}

#container div a:hover:after {
  opacity: 1;
}
#container div a span {
  position: relative;
  z-index: 3;
}

它对您有用吗？根据需要更改颜色：）

— 雷蒙德
source
1

尝试使用：before和：after（ie9 +）

#wrapper{
    width:400px;
    height:400px;
    margin:0 auto;
    border: 1px #000 solid;
    position:relative;}
#wrapper:after,
#wrapper:before{
    position:absolute;
    top:0;
    left:0;
    width:100%;
    height:100%;
    content:'';
    background: #1e5799;
    background: -moz-linear-gradient(top, #1e5799 0%, #2989d8 50%, #207cca 51%, #7db9e8 100%);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#1e5799), color-stop(50%,#2989d8), color-stop(51%,#207cca), color-stop(100%,#7db9e8));
    background: -webkit-linear-gradient(top, #1e5799 0%,#2989d8 50%,#207cca 51%,#7db9e8 100%);
    background: -o-linear-gradient(top, #1e5799 0%,#2989d8 50%,#207cca 51%,#7db9e8 100%);
    background: -ms-linear-gradient(top, #1e5799 0%,#2989d8 50%,#207cca 51%,#7db9e8 100%);
    background: linear-gradient(to bottom, #1e5799 0%,#2989d8 50%,#207cca 51%,#7db9e8 100%);
    opacity:1;
    z-index:-1;
    -webkit-transition: all 2s ease-out;
    -moz-transition: all 2s ease-out;
    -ms-transition: all 2s ease-out;
    -o-transition: all 2s ease-out;
    transition: all 2s ease-out;
}
#wrapper:after{
    opacity:0;
    background: #87e0fd;
    background: -moz-linear-gradient(top, #87e0fd 0%, #53cbf1 40%, #05abe0 100%);
    background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#87e0fd), color-stop(40%,#53cbf1), color-stop(100%,#05abe0));
    background: -webkit-linear-gradient(top, #87e0fd 0%,#53cbf1 40%,#05abe0 100%);
    background: -o-linear-gradient(top, #87e0fd 0%,#53cbf1 40%,#05abe0 100%);
    background: -ms-linear-gradient(top, #87e0fd 0%,#53cbf1 40%,#05abe0 100%);
    background: linear-gradient(to bottom, #87e0fd 0%,#53cbf1 40%,#05abe0 100%);
}
#wrapper:hover:before{opacity:0;}
#wrapper:hover:after{opacity:1;}
— 安农
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1

就像声明的那样。当前，CSS Transitions不支持渐变。但是在某些情况下，您可以通过将一种颜色设置为透明来解决该问题，以使其他包装元素的背景色发光，并进行过渡。

— 詹斯
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1

我在工作中使用它:) IE6 + https://gist.github.com/GrzegorzPerko/7183390

不要忘记<element class="ahover"><span>Text</span></a>您是否使用文本元素。

.ahover {
    display: block;
    /** text-indent: -999em; ** if u use only only img **/
    position: relative;
}
.ahover:after {
    content: "";
    height: 100%;
    left: 0;
    opacity: 0;
    position: absolute;
    top: 0;
    transition: all 0.5s ease 0s;
    width: 100%;
    z-index: 1;
}
.ahover:hover:after {
    opacity: 1;
}
.ahover span {
    display: block;
    position: relative;
    z-index: 2;
}
— 达顿
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0

发表另一种观点很容易，因为仍然没有官方的方法可以做到这一点。编写了一个轻量级的jQuery插件，您可以使用它定义背景径向渐变和过渡速度。然后，此基本用法将使其淡出，并使用requestAnimationFrame优化（非常平滑）：

$('#element').gradientFade({

    duration: 2000,
    from: '(20,20,20,1)',
    to: '(120,120,120,0)'
});

http://codepen.io/Shikkediel/pen/xbRaZz?editors=001

保持原始背景和所有属性不变。还具有突出显示跟踪设置：

http://codepen.io/Shikkediel/pen/VYRZZY?editors=001

— Shikkediel
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0

我想让div看起来像3D球体并通过颜色进行过渡。我发现渐变背景色还没有过渡。我在元素前面放置了一个径向渐变背景（使用z-index），并带有过渡的实心背景。

/* overlay */
z-index : 1;
background : radial-gradient( ellipse at 25% 25%, rgba( 255, 255, 255, 0 ) 0%, rgba( 0, 0, 0, 1 ) 100% );

然后在div.ball下面：

transition : all 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);

然后更改和的背景颜色div.ball！

https://codepen.io/keldon/pen/dzPxZP

— 拉什克尔顿
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