I Can't make css svg animation emoji similar to Pinterest reactions

问题

I can't make a CSS animation with my SVG sprite similar to Pinterest. The sprite is 90 frames, but I can't get it to work

Pinterest Reactions Emojis

View Pinterest Sprite 90 frames in Svg

My code:

.emoji{
  width: 110px;
  height: 110px;
  background-image : url(https://s.pinimg.com/webapp/style/images/wow-0a7ea725.svg);
  animation: moveX 1s steps(90) infinite;
}

@keyframes moveX{
  from{background-position-x:0px;}
  to{background-position-x:-500px;}
}

<div class="emoji"></div>

My JSFiddle:

https://jsfiddle.net/u81xkcon/

回答1:

Here you go

.emoji {
  width: 110px;
  display: inline-flex;
  background-image: url(https://s.pinimg.com/webapp/style/images/wow-0a7ea725.svg);
  background-size: auto 100%;
  animation: moveX 1s steps(90) infinite;
}

.emoji::before {
  content: "";
  padding-top: 100%; /* keep the square ratio */
}

@keyframes moveX {
  to {
    background-position: right; /* you only need to move to right */
  }
}

<div class="emoji"></div>
<div class="emoji" style="width:50px"></div>

回答2:

If you take Temani his great answer, add a modern W3C standard Web Component that uses Template Literal parsing to create the SVG sprite Client Side in a shadowDOM

(and do some better animation calculations in the <template>)

You save downloading a 65KB SVG file, and get:

<svg-spriter w=100 h=100 s=40 width="130px">
  <template>
    <g id="sprite${n}_${s}" transform="translate(${n*w})">
      <rect x='5' y='5' width='90' height='90' rx='20' fill='#ffad65'></rect>
      <circle cx='30' cy='30' r='${12+(n<10?-n:n)*.1}'></circle>
      <circle cx='80' cy='30' r='${12+(n<10?n:-n)*.1}'></circle>
      <ellipse cx='60' cy='70' rx="${10+(n<20?n*0.5:((20-n)*-0.5))}" ry="5"></ellipse>
    </g>
  </template>
</svg-spriter>
<script>
  customElements.define("svg-spriter", class extends HTMLElement {
    constructor() { super().attachShadow({mode: "open"}) }
    connectedCallback() {
      const parsed = (template, vars = {}) => new Function('vars', [
        'let f = ( ' + Object.keys(vars).join(', ') + ' ) =>',
        '`' + template + '`','return f(...Object.values(vars))'
      ].join('\n'))(vars);
      setTimeout(() => { // wait till <template> is parsed by the Browser
        let attr = (x) => this.getAttribute(x);
        let [w, h, s] = ["w", "h", "s"].map(a => ~~attr(a));
        let width = attr("width");
        let frame = this.querySelector("template").innerHTML;
        let svg =
          (`data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 ${s*w} ${h}'>` +
            Array(s).fill().map((s, n) => parsed(frame, {n,w,h,s})).join("") + "</svg>").replace(/#/g, "%23").replace(/\n/g, "").replace(/</g, "%3C").replace(/>/g, "%3E").replaceAll('"', "'");
        let html = `<style>div{width:${width};display:inline-flex;background-image: url("${svg}");background-size: auto ${width};animation:moveX 1s steps(${s-1}) infinite}div::before{content:"";padding-top:100%;}@keyframes moveX{to{background-position:right}}</style><div></div>`;
        html += `<br>Sprite as IMG:<br><img src="${svg}">`;
        this.shadowRoot.innerHTML = html;
      })
    }
  });
</script>

来源：https://stackoverflow.com/questions/65516030/i-cant-make-css-svg-animation-emoji-similar-to-pinterest-reactions

标签

css

svg

css-animations