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更新时间：2023-11-17 13:58:04
您必须使用一叠圆圈，而不是阴影。 < circle> 的半径无法CSS设置动画，因此要解决此问题，您必须使用比例转换。 （SMIL动画可以在半径上工作，但与Microsoft浏览器不兼容。）
rect {填充：＃4e4e4e;}圆圈{填充：＃65ff78;透明度：0.3;} svg> circle：last-child {填充：＃35ffc3;透明度：1；}＃rp1 {动画：ripple1 0.7s线性无限；} @关键帧涟漪1 {0％{转换：scale（5.5）;不透明度：0.3; } 100％{transform：scale（8.5）;不透明度：0.0; }}＃rp2 {动画：涟漪2 0.7s线性无限；} @关键帧涟漪2 {0％{变换：scale（3.5）; } 100％{transform：scale（5.5）; }}＃rp3 {动画：涟漪3 0.7s线性无限；} @关键帧涟漪3 {0％{变换：scale（1.5）; } 100％{transform：scale（3.5）; }}＃rp4 {动画：涟漪4 0.7s线性无限；} @关键帧涟漪4 {0％{变换：scale（0.5）; } 100％{transform：scale（1.5）; }}
< svg xmlns = http：// www.w3.org/2000/svg height = 100％ width = 100％< defs> < g id = anims> < circle id = rp1 r = 1em /> < circle id = rp2 r = 1em /> < circle id = rp3 r = 1em /> < circle id = rp4 r = 1em /> < / g>< / defs>< rect height = 100％ width = 100％ /><使用xlink：href =＃anims x = 50％ y = 50％ /><圆r = 0.5em cx = 50％ cy = 50％ />< / svg>
I am trying to apply the following animation to an svg circle element:
$color: #65ff78;
html, body {
width: 100%;
height: 100%;
}
body {
background-color: #4e4e4e;
display: flex;
align-items: center;
justify-content: center;
}
.circle-ripple {
background-color: #35ffc3;
width: 1em;
height: 1em;
border-radius: 50%;
animation: ripple 0.7s linear infinite;
}
@keyframes ripple {
0% {
box-shadow: 0 0 0 0 rgba($color, 0.3),
0 0 0 1em rgba($color, 0.3),
0 0 0 3em rgba($color, 0.3),
0 0 0 5em rgba($color, 0.3);
}
100% {
box-shadow: 0 0 0 1em rgba($color, 0.3),
0 0 0 3em rgba($color, 0.3),
0 0 0 5em rgba($color, 0.3),
0 0 0 8em rgba($color, 0);
}
}
https://codepen.io/FabienMotte/pen/gPKVxE
Changing the div to a circle did not work, as expected.
In the above codepen a div element has been used, but can I apply the same effect to an svg circle element?
Thanks in advance.
You'll have to use a stack of circles instead of shadows. The radius of a <circle> is not CSS-animatable, so as a workaround you'll have to use a scale transformation. (A SMIL animation could work on the radius, but would not be compatible with Microsoft browsers.)
rect {
fill: #4e4e4e;
}
circle {
fill: #65ff78;
opacity: 0.3;
}
svg > circle:last-child {
fill: #35ffc3;
opacity: 1;
}
#rp1 {
animation: ripple1 0.7s linear infinite;
}
@keyframes ripple1 {
0% {
transform: scale(5.5);
opacity: 0.3;
}
100% {
transform: scale(8.5);
opacity: 0.0;
}
}
#rp2 {
animation: ripple2 0.7s linear infinite;
}
@keyframes ripple2 {
0% {
transform: scale(3.5);
}
100% {
transform: scale(5.5);
}
}
#rp3 {
animation: ripple3 0.7s linear infinite;
}
@keyframes ripple3 {
0% {
transform: scale(1.5);
}
100% {
transform: scale(3.5);
}
}
#rp4 {
animation: ripple4 0.7s linear infinite;
}
@keyframes ripple4 {
0% {
transform: scale(0.5);
}
100% {
transform: scale(1.5);
}
}
<svg xmlns="http://www.w3.org/2000/svg" height="100%" width="100%">
<defs>
<g id="anims">
<circle id="rp1" r="1em" />
<circle id="rp2" r="1em" />
<circle id="rp3" r="1em" />
<circle id="rp4" r="1em" />
</g>
</defs>
<rect height="100%" width="100%" />
<use xlink:href="#anims" x="50%" y="50%"/>
<circle r="0.5em" cx="50%" cy="50%" />
</svg>