我正在开发一个初学者项目,当我将鼠标悬停在Instagram图标上时,我希望它能够从我从StackOverflow复制的一些svg代码中慢慢过渡到渐变色。我理解SVG代码是如何工作的(通常),但无法弄清楚如何使转换工作。
这是一段必要的代码,以及我迄今为止尝试过的CSS。
我认为fill
的结束转换价值是造成问题的原因。如果我将其更改为其他值,例如"blue"
或"red"
,则转换效果正常。
.social-container {
position: absolute;
bottom: 0;
color: white;
border: 1px solid white;
display: flex;
width: 150px;
height: 35px;
justify-content: space-between;
align-items: center;
}
svg {
transition: fill 3s ease;
}
.instagram-logo svg * {
transition: all 2s ease;
fill: black;
}
.instagram-logo:hover svg * {
fill: url(#rg);
}
/* So I noticed the issue is the .instagram-logo:hover svg * {}. When I use a solid color like "blue" for the fill value, the transition works flawlessly. But when using the url, it doesn't work at all */

<script src="https://use.fontawesome.com/releases/v5.0.8/js/all.js"></script>
<div class="instagram-logo">
<svg width="0" height="0">
<radialGradient id="rg" r="150%" cx="30%" cy="107%">
<stop stop-color="#fdf497" offset="0" />
<stop stop-color="#fdf497" offset="0.05" />
<stop stop-color="#fd5949" offset="0.45" />
<stop stop-color="#d6249f" offset="0.6" />
<stop stop-color="#285AEB" offset="0.9" />
</radialGradient>
</svg>
<i class="fab fa-instagram fa-2x"></i>
</div>
&#13;
答案 0 :(得分:1)
浏览器开始支持<color>
值的CSS转换,因此他们接受在您的CSS fill: <color>
与其他fill: <color>
之间进行转换。
但是,当您将此fill
值设置为渐变时,对于引擎,它现在是<urlFunc>
值,最终解析为<image>
值*。因此,无法从<color>
过渡到此新值。
* 虽然我不确定这个断言......
一种解决方案是设置CSS <filter>
值的动画:
.instagram-logo{
padding: 2px 8px;
}
.instagram-logo svg.fa-instagram path{
fill: url(#rg);
}
/* from black to color */
.instagram-logo svg.fa-instagram{
filter: brightness(0%) grayscale(100%);
transition: filter 2s ease, -webkit-filter 2s ease;
}
.instagram-logo svg.fa-instagram:hover{
filter: brightness(100%) grayscale(0%);
}
/* from white to color */
.instagram-logo.white{
background: black;
}
.instagram-logo.white svg.fa-instagram{
filter: brightness(0%) grayscale(100%) invert(1);
}
.instagram-logo.white svg.fa-instagram:hover{
/*
we need to make a new declaration
because transitions can only be done on func values
so we need the same <filterFunc> at both hands of the transition
*/
filter: brightness(100%) grayscale(0%) invert(0);
}
&#13;
<script src="https://use.fontawesome.com/releases/v5.0.8/js/all.js"></script>
<div class="instagram-logo">
<svg class="hidden" width="0" height="0" style="position:absolute; z-index:-1">
<radialGradient id="rg" r="150%" cx="30%" cy="107%">
<stop stop-color="#fdf497" offset="0" />
<stop stop-color="#fdf497" offset="0.05" />
<stop stop-color="#fd5949" offset="0.45" />
<stop stop-color="#d6249f" offset="0.6" />
<stop stop-color="#285AEB" offset="0.9" />
</radialGradient>
</svg>
<i class="fab fa-instagram fa-2x"></i>
</div>
<div class="instagram-logo white">
<i class="fab fa-instagram fa-2x"></i>
</div>
&#13;
请注意,在给定的示例中,我在父<svg>
节点上设置了过滤器,因为chrome似乎不支持在没有前缀的内部SVG节点上进行CSS过滤。