我有以下代码,我想在feDropShadow
内为defs
设置动画
@import url("https://fonts.googleapis.com/css?family=Open+Sans:300&display=swap");
*,*::before,*::after {
box-sizing: border-box;
position: relative;
}
html,body {
padding: 0;
margin: 0;
width: 100%;
height: 100%;
}
body {
display: flex;
justify-content: center;
align-items: center;
font-family: "Open Sans",sans-serif;
}
:root {
--easing: cubic-bezier(0.87,0.08,0.23,0.91);
--duration: 0.3s;
--pink: #770946;
}
#app {
height: 100vh;
width: 100%;
background: #1e0238;
position: relative;
overflow: hidden;
}
.circle-pink {
transform: scale(1);
fill: none;
stroke: var(--pink);
stroke-width: 6;
}
.circle-fill {
transform: scale(1);
transform-origin: center center;
fill: var(--pink);
stroke: none;
stroke-width: 0;
filter: url(#shadow);
}
<div id='app'>
<svg viewBox="0 0 100 100">
<defs>
<filter id="shadow">
<feDropShadow id="shadow-appear" dx="-0.4" dy="0.4" stdDeviation="0.2" flood-opacity="0.25" />
</filter>
<animate xlink:href="shadow-appear" attributeName="dx" values="0;-0.4;0" dur="3s" />
<animate xlink:href="shadow-appear" attributeName="dy" values="0;0.4;0" dur="3s" />
</defs>
<circle cx="50" cy="25" r="45" class="circle-pink" />
<circle cx="50" cy="25" r="40" class="circle-pink" />
<circle cx="50" cy="25" r="35" class="circle-pink" />
<circle cx="50" cy="25" r="30" class="circle-pink" />
<circle cx="50" cy="25" r="25" class="circle-pink" />
<circle cx="50" cy="25" r="20" class="circle-pink" />
<circle cx="50" cy="25" r="18" class="circle-pink circle-fill">
<animate attributeName="r" values="18;20;18" dur="3s" repeatCount="indefinite" />
</circle>
</svg>
</div>
根据MDN docs,这些属性是可动画的。
我只想使用SVG实现this animation。
半径是动画,而不是阴影。
我也找不到与此相关的任何体面的文档。
PS; 我已经尝试过this pen,但在我的情况下不起作用。