SVG 动画 - CSS 中心的 SVG 悬停动画

Question

这个效果我在GSAP做过，这里有Codepen作为参考：

https://codepen.io/whitelionx/full/vYGQqBZ

const svgs = document.querySelectorAll("svg");

svgs.forEach((svg) => {
  const tl = gsap
    .timeline({
      defaults: { ease: "power1.in" },
      paused: true
    })
    .to(svg.children[0], { drawSVG: "50% 50%" })
    .from(svg.children[1], { drawSVG: "0% 0%" }, 0);

  svg.addEventListener("mouseenter", () => tl.play());
  svg.addEventListener("mouseleave", () => tl.reverse());
});

现在我只想用 CSS 来做，这样当我悬停我的 svg 时我会得到同样的效果，这是我的代码沙箱：

https://codesandbox.io/s/xenodochial-benz-17lss?file=/src/styles.css

Answer 1

我修改了一些东西来为 stroke-dasharray 设置动画。

body {
    background: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    flex-direction: column;
}

svg {
    width: 50px;
    height: 50px;
    margin: 25px;
}

.circle {
    stroke-dasharray: 28.3,0,28.3;
    transform-origin: 50% 50%;
    transform: rotate(180deg);
    transition: stroke-dasharray 0.5s linear;
}

.line {
    stroke-dasharray: 20;
    stroke-dashoffset: 20;
    transition: stroke-dashoffset 0.5s linear;
}

svg:hover .circle {
    stroke-dasharray: 0,56.0;
}

svg:hover .line {
    stroke-dashoffset: 0;
}

<svg
  version="1.1"
  shape-rendering="auto"
  xmlns="http://www.w3.org/2000/svg"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  viewBox="0 0 20 20"
  xml:space="preserve">
 <path class="circle" fill="none" stroke="#FFFFFF" stroke-miterlimit="10" d="M10,1c5,0,9,4,9,9s-4,9-9,9s-9-4-9-9S5,1,10,1z"/>
 <path class="line" fill="none" stroke="#FFFFFF" stroke-miterlimit="10" d="M10,0v20"/>
</svg>

Answer 2

同时我也这样做了，现在我对 css 动画有了更好的理解，这也要感谢你的回答:D 跳出框框思考

body {
    background: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    flex-direction: column;
}

svg {
    width: 50px;
    height: 50px;
    margin: 25px;
    cursor: pointer;
}

.circle {
    stroke-dasharray: 56.6;
    stroke-dashoffset: 0;
    transform-origin: 50% 50%;
    transition: stroke-dashoffset 0.3s linear, transform 0.3s linear;
}

.line {
    stroke-dasharray: 20;
    stroke-dashoffset: 20;
    transition: stroke-dashoffset 0.3s linear;
}

svg:hover .circle {
    stroke-dashoffset: 56.6;
    transform: rotate(180deg);
}

svg:hover .line {
    stroke-dashoffset: 0;
}

    <svg
                version="1.1"
                shape-rendering="auto"
                xmlns="http://www.w3.org/2000/svg"
                xmlns:xlink="http://www.w3.org/1999/xlink"
                x="0px"
                y="0px"
                viewBox="0 0 20 20"
                enable-background="new 0 0 20 20"
                xml:space="preserve"
            >
                <path
                    class="circle"
                    fill="none"
                    stroke="#FFFFFF"
                    stroke-miterlimit="10"
                    d="M10,1c5,0,9,4,9,9s-4,9-9,9s-9-4-9-9S5,1,10,1z"
                ></path>
                <path
                    class="line"
                    fill="none"
                    stroke="#FFFFFF"
                    stroke-miterlimit="10"
                    d="M10,0v20"
                ></path>
            </svg>

SVG 动画 - CSS 中心的 SVG 悬停动画

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