js和css特效-使用 CSS 构建强大且酷炫的粒子动画

js和css特效-使用 CSS 构建强大且酷炫的粒子动画

新建index.html 输入下面的代码：

<style type="text/css">
.caired { 
  height: 100%; 
  margin: 0; 
  overflow: hidden;
}
.caired {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000; //背景黑色
}
</style>
<div class="caired";>
<!-- partial:index.partial.html -->
<css-doodle>
  <style>
    @grid: 50x1 / 50vmin;
    :container {
      perspective: 23vmin;
    }
    background: @m(
      @r(200, 240), 
      radial-gradient(
        @p(#00b8a9, #f8f3d4, #f6416c, #ffde7d) 15%,
        transparent 50%
      ) @r(100%) @r(100%) / @r(1%, 3%) @lr no-repeat
    );

    @size: 80%;
    @place-cell: center;

    border-radius: 50%;
    transform-style: preserve-3d;
    animation: scale-up 20s linear infinite;
    animation-delay: calc(@i * -.4s);

    @keyframes scale-up {
      0% {
        opacity: 0;
        transform: translate3d(0, 0, 0) rotate(0);
      }
      10% { 
        opacity: 1; 
      }
      95% {
        transform:
          translate3d(0, 0, @r(50vmin, 55vmin))
          rotate(@r(-360deg, 360deg));
      }
      100% {
        opacity: 0;
        transform: translate3d(0, 0, 1vmin);
      }
    }
  </style>
</css-doodle>
<!-- partial -->
  <script src='css-doodle.min.js'></script>
</div>

新建css-doodle.min.js文件，输入下面的代码：

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ut(e){return/^\:(host|doodle)/.test(e)}function ct(e){return/^\:(container|parent)/.test(e)}function ht(e){return ut(e)||ct(e)}class pt{constructor(e,t){this.tokens=e,this.rules={},this.props={},this.keyframes={},this.grid=null,this.is_grid_defined=!1,this.coords=[],this.doodles={},this.shaders={},this.paths={},this.reset(),this.Func=Fe(t),this.Selector=function(e){return{at:({x:e,y:t})=>(n,r)=>e==n&&t==r,nth:({count:e,grid:t})=>(...n)=>n.some((n=>rt(n)?nt[n](e):tt(n,e,t.count))),row:({y:e,grid:t})=>(...n)=>n.some((n=>rt(n)?nt[n](e):tt(n,e,t.y))),col:({x:e,grid:t})=>(...n)=>n.some((n=>rt(n)?nt[n](e):tt(n,e,t.x))),even:({count:e,grid:t,y:n})=>r=>{if("cross"===r&&nt.even(t.x)){let t=nt.even(n)?"odd":"even";return nt[t](e)}return nt.even(e)},odd:({count:e,grid:t,y:n})=>r=>{if("cross"===r&&nt.even(t.x)){let t=nt.even(n)?"even":"odd";return nt[t](e)}return nt.odd(e)},random:()=>(t=.5)=>(t>=1&&t<=0&&(t=.5),e()<t)}}(t),this.custom_properties={},this.uniforms={},this.unique_id=K(t).unique_id}reset(){this.styles={host:"",container:"",cells:"",keyframes:""},this.coords=[],this.doodles={};for(let e in this.rules)e.startsWith("#c")&&delete this.rules[e]}add_rule(e,t){let n=this.rules[e];n||(n=this.rules[e]=[]),n.push.apply(n,lt(t))}pick_func(e){return this.Func[e]||it[e]}apply_func(e,t,n){let r=e(...lt(t)),i=[];return n.forEach((e=>{let t=typeof e.value,n="number"===t||"string"===t;if(!e.cluster&&n)i.push(...je(e.value,!0));else if("function"==typeof e)i.push(e);else if(!O(e.value)){let t=D(e.value);i.push(t)}})),i=at(i),r(...lt(i))}compose_aname(...e){return e.join("-")}compose_selector({x:e,y:t,z:n},r=""){return`#${U(e,t,n)}${r}`}is_composable(e){return["doodle","shaders"].includes(e)}compose_argument(e,t,n=[]){let r=e.map((e=>{if("text"===e.type)return e.value;if("func"===e.type){let r=e.name.substr(1),i=this.pick_func(r);if("function"==typeof i){if("t"===r&&(this.uniforms.time=!0),this.is_composable(r)){let n=D((e.arguments[0]||[])[0]);if(!O(n))switch(r){case"doodle":return this.compose_doodle(n);case"shaders":return this.compose_shaders(n,t)}}t.extra=n,t.position=e.position;let s=e.arguments.map((e=>i.lazy?(...n)=>this.compose_argument(e,t,n):this.compose_argument(e,t,n))),o=this.apply_func(i,t,s);return"path"==r?this.compose_path(o):o}}}));return{cluster:e.cluster,value:r.length>=2?{value:r.join("")}:r[0]}}compose_doodle(e){let t=this.unique_id("doodle");return this.doodles[t]=e,"${"+t+"}"}compose_shaders(e,{x:t,y:n,z:r}){let i=this.unique_id("shader");return this.shaders[i]={shader:e,cell:U(t,n,r)},"${"+i+"}"}compose_path(e){let t=this.unique_id("path");return this.paths[t]={id:t,commands:e},"${"+t+"}"}compose_value(e,t){return Array.isArray(e)?e.reduce(((e,n)=>{switch(n.type){case"text":e+=n.value;break;case"func":{let 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r=t.arguments.map((t=>this.compose_argument(t,e)));this.apply_func(n,e,r)&&this.compose(e,t.styles)}break}case"keyframes":this.keyframes[t.name]||(this.keyframes[t.name]=e=>`\n ${ot(t.steps.map((t=>`\n ${t.name}{${ot(t.styles.map((t=>this.compose_rule(t,e))))}}`)))}`)}}))}output(){Object.keys(this.rules).forEach(((e,t)=>{if(ct(e))this.styles.container+=`\n .container{${ot(this.rules[e])}}`;else{let t=ut(e)?"host":"cells",n=ot(this.rules[e]).trim(),r="host"===t?`${e}, .host`:e;this.styles[t]+=`${r}{${n}}`}}));let e=Object.keys(this.keyframes);this.uniforms.time&&(this.styles.container+=`\n:host, .host{animation:${He.animation};}`,this.styles.keyframes+=`\n @keyframes ${He["animation-name"]}{from{--${He.name}:0} to{--${He.name}:${He["animation-duration"]}}}`),this.coords.forEach(((t,n)=>{e.forEach((e=>{let r=this.compose_aname(e,t.count);var i,s;this.styles.keyframes+=`\n ${i=0===n,s=`@keyframes ${e}{${this.keyframes[e](t)}}`,i?"function"==typeof s?s():s:""} @keyframes ${r}{${this.keyframes[e](t)}}`}))}));let t=[];return Object.keys(this.custom_properties).forEach((e=>{let n=function(e){let t=String(e).substr(2).split("-")[0];if(void 0!==st[t])return{name:e,syntax:`<${t}>|<${t}>+ |<${t}>#`,initialValue:st[t],inherits:!1}}(e);n&&t.push(n)})),{props:this.props,styles:this.styles,grid:this.grid,doodles:this.doodles,shaders:this.shaders,paths:this.paths,definitions:t,uniforms:this.uniforms}}}function dt(e,t,n){let r=new pt(e,n),i={};r.pre_compose({x:1,y:1,z:1,count:1,context:{},grid:{x:1,y:1,z:1,count:1}});let{grid:s}=r.output();if(s&&(t=s),r.reset(),1==t.z)for(let e=1,n=0;e<=t.y;++e)for(let s=1;s<=t.x;++s)r.compose({x:s,y:e,z:1,count:++n,grid:t,context:i});else for(let e=1,n=0;e<=t.z;++e)r.compose({x:1,y:1,z:e,count:++n,grid:t,context:i});return r.output()}var ft=window,mt=Math,gt=[],yt=256,vt=mt.pow(yt,6),xt=mt.pow(2,52),bt=2*xt,_t=255;function wt(e,t,n){var r=[],i=Et(St((t=1==t?{entropy:!0}:t||{}).entropy?[e,zt(gt)]:null==e?function(){try{var e;return 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e)try{r.push(St(e[n],t-1))}catch(e){}return r.length?r:"string"==i?e:e+"\0"}function Et(e,t){for(var n,r=e+"",i=0;i<r.length;)t[_t&i]=_t&(n^=19*t[_t&i])+r.charCodeAt(i++);return zt(t)}function zt(e){return String.fromCharCode.apply(0,e)}function Tt(e,t,n){let r=e.createShader(t);return e.shaderSource(r,n),e.compileShader(r),r}function jt(e,t){return e.includes(t)?e:t+"\n"+e}Et(mt.random(),gt);function At(e,t,n){let r=document.createElement("canvas"),i=window.devicePixelRatio||1;t*=i,n*=i,r.width=t,r.height=n;let s=r.getContext("webgl")||r.getContext("exprimental-webgl");if(!s)return Promise.resolve("");let o=jt(e.fragment||"","uniform vec2 u_resolution;");e.textures.forEach((e=>{let t=`uniform sampler2D ${e.name};`;o=jt(o,t)}));let l=function(e,t,n){let r=Tt(e,e.VERTEX_SHADER,t),i=Tt(e,e.FRAGMENT_SHADER,n),s=e.createProgram();return e.attachShader(s,r),e.attachShader(s,i),e.linkProgram(s),e.getProgramParameter(s,e.LINK_STATUS)||(console.warn("Link failed:"+e.getProgramInfoLog(s)),console.warn("vs info-log:"+e.getShaderInfoLog(r)),console.warn("fs info-log:"+e.getShaderInfoLog(i))),s}(s,e.vertex||"\n attribute vec4 position;void main(){gl_Position = position;}","\n precision highp float;"+o),a=s.getAttribLocation(l,"position"),u=s.createBuffer();s.bindBuffer(s.ARRAY_BUFFER,u);return s.bufferData(s.ARRAY_BUFFER,new Float32Array([-1,-1,-1,1,1,-1,1,1,-1,1,1,-1]),s.STATIC_DRAW),s.enableVertexAttribArray(a),s.vertexAttribPointer(a,2,s.FLOAT,!1,0,0),s.viewport(0,0,s.drawingBufferWidth,s.drawingBufferHeight),s.clearColor(0,0,0,0),s.clear(s.COLOR_BUFFER_BIT),s.useProgram(l),s.uniform2fv(s.getUniformLocation(l,"u_resolution"),[t,n]),e.textures.forEach(((e,t)=>{!function(e,t,n){const r=e.createTexture();e.activeTexture(e["TEXTURE"+n]),e.pixelStorei(e.UNPACK_FLIP_Y_WEBGL,!0),e.bindTexture(e.TEXTURE_2D,r),e.texImage2D(e.TEXTURE_2D,0,e.RGBA,e.RGBA,e.UNSIGNED_BYTE,t),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_S,e.CLAMP_TO_EDGE),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_WRAP_T,e.CLAMP_TO_EDGE),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_MIN_FILTER,e.LINEAR),e.texParameteri(e.TEXTURE_2D,e.TEXTURE_MAG_FILTER,e.LINEAR)}(s,e.value,t),s.uniform1i(s.getUniformLocation(l,e.name),t)})),s.drawArrays(s.TRIANGLES,0,6),Promise.resolve(r.toDataURL())}class Rt extends HTMLElement{constructor(){super(),this.doodle=this.attachShadow({mode:"open"}),this.extra={get_variable:e=>function(e,t){return getComputedStyle(e).getPropertyValue(t).trim().replace(/^\(|\)$/g,"")}(this,e)}}connectedCallback(e){/^(complete|interactive|loaded)$/.test(document.readyState)?this.load(e):setTimeout((()=>this.load(e)))}update(e){let t=this.get_use();e||(e=this.innerHTML),this.innerHTML=e,this.grid_size||(this.grid_size=this.get_grid());let{x:n,y:r,z:i}=this.grid_size;const s=this.generate(P(t+e,this.extra));if(!this.shadowRoot.innerHTML)return Object.assign(this.grid_size,s.grid),this.build_grid(s,s.grid);if(s.grid){let{x:e,y:t,z:o}=s.grid;if(n!==e||r!==t||i!==o)return Object.assign(this.grid_size,s.grid),this.build_grid(s,s.grid);Object.assign(this.grid_size,s.grid)}else{let s=this.get_grid(),{x:o,y:l,z:a}=s;if(n!==o||r!==l||i!==a)return Object.assign(this.grid_size,s),this.build_grid(this.generate(P(t+e,this.extra)),s)}let o=this.build_svg_paths(s.paths);if(o){let e=this.shadowRoot.querySelector(".svg-defs");e&&(e.innerHTML=o)}s.uniforms.time&&this.register_uniform_time();let l=this.replace(s);this.set_content(".style-keyframes",l(s.styles.keyframes)),s.props.has_animation&&(this.set_content(".style-cells",""),this.set_content(".style-container","")),setTimeout((()=>{this.set_content(".style-container",l(Mt(this.grid_size)+s.styles.host+s.styles.container)),this.set_content(".style-cells",l(s.styles.cells))}))}get grid(){return Object.assign({},this.grid_size)}set grid(e){this.attr("grid",e),this.connectedCallback(!0)}get seed(){return this._seed_value}set seed(e){this.attr("seed",e),this.connectedCallback(!0)}get use(){return this.attr("use")}set use(e){this.attr("use",e),this.connectedCallback(!0)}static get observedAttributes(){return["grid","use","seed"]}attributeChangedCallback(e,t,n){if(t==n)return!1;["grid","use","seed"].includes(e)&&!O(t)&&(this[e]=n)}get_grid(){return G(this.attr("grid"))}get_use(){let e=this.attr("use")||"";return e&&(e=`@use:${e};`),e}attr(e,t){return 1===arguments.length?this.getAttribute(e):2===arguments.length?(this.setAttribute(e,t),t):void 0}generate(e){let t=this.get_grid(),n=this.attr("seed")||this.attr("data-seed");O(n)&&(n=Date.now()),n=String(n),this._seed_value=n;let r=this.random=wt(n);return this.compiled=dt(e,t,r)}doodle_to_image(e,t,n){"function"==typeof t&&(n=t,t=null);let r=P(e,this.extra),i=G({}),s=dt(r,i,this.random),o=s.grid?s.grid:i;const{keyframes:l,host:a,container:u,cells:c}=s.styles;let h=this.build_svg_paths(s.paths),p=this.replace(s),d=Lt(o);p(`\n<svg ${t&&t.width&&t.height?`width="${t.width}" height="${t.height}"`:""} xmlns="http://www.w3.org/2000/svg" preserveAspectRatio="none"><foreignObject width="100%" height="100%"><div class="host" xmlns="http://www.w3.org/1999/xhtml"><style>${Pt()} ${Mt(o)} ${a} ${u} ${c} ${l}</style><svg xmlns="http://www.w3.org/2000/svg" style="width:0;height:0"><defs class="svg-defs">${h}</defs></svg>${d}</div></foreignObject></svg>`).then((e=>{let t=`data:image/svg+xml;base64,${window.btoa(unescape(encodeURIComponent(e)))}`;q()&&W(t),n(t)}))}shader_to_image({shader:e,cell:t},n){let r=function(e){let t="",n="",r="",i=[],s={textures:[]},o="",l=[],a=0;for(;void 0!==(t=e[a++]);)if('"'!=t&&"'"!=t||(Y(i)==t?i.pop():i.push(t)),"{"!=t||V(Y(i)))if("}"!=t||V(Y(i)))/\s/.test(t)&&o.length?(l.push(o),o="",("#define"==l[l.length-3]||"#ifdef"==l[l.length-2]||"#else"==l[l.length-1]||"#endif"==l[l.length-1])&&(n+="\n")):o+=t,n+=t;else if(i.pop(),i.length)n+=t;else{let e=r.trim(),t=n.trim().replace(/^\(+|\)+$/g,"");e.length&&(e.startsWith("texture")?s.textures.push({name:e,value:t}):s[e]=t),r=n=""}else i.length?n+=t:(r=n,n=""),i.push(t);return void 0===s.fragment?{fragment:e,textures:[]}:s}(e),i=this.doodle.getElementById(t),{width:s=0,height:o=0}=i&&i.getBoundingClientRect()||{},l=window.devicePixelRatio||1;if(r.textures.length){let e=r.textures.map((e=>new Promise((t=>{this.doodle_to_image(e.value,{width:s,height:o},(n=>{let r=new Image;r.width=s*l,r.height=o*l,r.onload=()=>t({name:e.name,value:r}),r.src=n}))}))));Promise.all(e).then((e=>{r.textures=e,At(r,s,o).then(n)}))}else At(r,s,o).then(n)}load(e){e||this.hasAttribute("click-to-update")&&this.addEventListener("click",(e=>this.update()));let t=this.get_use();if(!this.innerHTML.trim()&&!t)return!1;let n=P(t+function(e){let t=document.createElement("textarea");return t.innerHTML=e,t.value}(this.innerHTML),this.extra),r=this.generate(n);this.grid_size=r.grid?r.grid:this.get_grid(),this.build_grid(r,this.grid_size)}replace({doodles:e,shaders:t,paths:n}){let r=Object.keys(e),i=Object.keys(t),s=Object.keys(n);return n=>{if(!r.length&&!i.length&&!s.length)return Promise.resolve(n);let o=[].concat(r.map((t=>n.includes(t)?new Promise((n=>{this.doodle_to_image(e[t],(e=>n({id:t,value:e})))})):Promise.resolve(""))),i.map((e=>n.includes(e)?new Promise((n=>{this.shader_to_image(t[e],(t=>n({id:e,value:t})))})):Promise.resolve(""))),s.map((e=>n.includes(e)?Promise.resolve({id:e,value:"#"+e}):Promise.resolve(""))));return Promise.all(o).then((e=>(n.replaceAll?e.forEach((({id:e,value:t})=>{n=n.replaceAll("${"+e+"}",`url(${t})`)})):e.forEach((({id:e,value:t})=>{n=n.replace("${"+e+"}",`url(${t})`)})),n)))}}build_grid(e,t){const{has_transition:n,has_animation:r}=e.props;let i=n||r;const{keyframes:s,host:o,container:l,cells:a}=e.styles;let u=Mt(t)+o+l,c=i?"":a,h=this.build_svg_paths(e.paths);const{uniforms:p}=e;let d=this.replace(e);this.doodle.innerHTML=`\n<style>${Pt(p)}</style><style class="style-keyframes">${s}</style><style class="style-container">${u}</style><style class="style-cells">${c}</style><svg xmlns="http://www.w3.org/2000/svg" style="width:0;height:0"><defs class="svg-defs">${h}</defs></svg>${Lt(t)}`,this.set_content(".style-container",d(u)),i?setTimeout((()=>{this.set_content(".style-cells",d(a))}),50):this.set_content(".style-cells",d(a));const f=e.definitions;if(window.CSS&&window.CSS.registerProperty)try{p.time&&this.register_uniform_time(),f.forEach(CSS.registerProperty)}catch(e){}}build_svg_paths(e){return Object.keys(e||{}).map((t=>`\n<clipPath id="${e[t].id}" clipPathUnits="objectBoundingBox"><path d="${e[t].commands}" /></clipPath>`)).join("")}register_uniform_time(){if(!this.is_uniform_time_registered){try{CSS.registerProperty({name:"--"+He.name,syntax:"<number>",initialValue:0,inherits:!0})}catch(e){}this.is_uniform_time_registered=!0}}export({scale:e,name:t,download:n,detail:r}={}){return new Promise(((i,s)=>{let o=function(e){let t={};if(e.computedStyleMap)for(let[n,r]of e.computedStyleMap())n.startsWith("--")&&(t[n]=r[0][0]);else{let n=getComputedStyle(e);for(let e of n)e.startsWith("--")&&(t[e]=n.getPropertyValue(e))}return function(e){let t=[];for(let n in e)t.push(n+":"+e[n]);return t.join(";")}(t)}(this),l=this.doodle.innerHTML,{width:a,height:u}=this.getBoundingClientRect(),c=a*(e=parseInt(e)||1),h=u*e,p=`\n<svg xmlns="http://www.w3.org/2000/svg"\n preserveAspectRatio="none"\n viewBox="0 0 ${a} ${u}"\n ${q()?"":`width="${c}px" height="${h}px"`}><foreignObject width="100%" height="100%"><div\n class="host"\n xmlns="http://www.w3.org/1999/xhtml"\n style="width:${a}px;height:${u}px;"\n><style>.host{${o}}</style>${l}</div></foreignObject></svg>`.replace(/\n\s+|^\s+|\n+/g," ").trim();n||r?function(e,t,n,r){return new Promise(((i,s)=>{let o=`data:image/svg+xml;utf8,${encodeURIComponent(e)}`;function l(){let e=new Image;e.crossOrigin="anonymous",e.src=o,e.onload=()=>{let l=document.createElement("canvas"),a=l.getContext("2d"),u=window.devicePixelRatio||1;1!=r&&(u=1),l.width=t*u,l.height=n*u,a.drawImage(e,0,0,l.width,l.height);try{l.toBlob((e=>{i({blob:e,source:o,url:URL.createObjectURL(e)})}))}catch(e){s(e)}}}q?W(o,l,200):l()}))}(p,c,h,e).then((({source:e,url:r,blob:s})=>{if(i({width:c,height:h,svg:p,blob:s,source:e}),n){let e=document.createElement("a");e.download=function(e){return(O(e)?Date.now():String(e).replace(/\/.png$/g,""))+".png"}(t),e.href=r,e.click()}})).catch((e=>{s(e)})):i({width:c,height:h,svg:p})}))}set_content(e,t){if(t instanceof Promise)t.then((t=>{this.set_content(e,t)}));else{const n=this.shadowRoot.querySelector(e);n&&(n.styleSheet?n.styleSheet.cssText=t:n.innerHTML=t)}}}function Pt(e={}){const t=Ge(/grid/).map((e=>`${e}:inherit;`)).join("");return`\n *{box-sizing:border-box\n} *::after, *::before{box-sizing:inherit\n}:host, .host{display:block;visibility:visible;width:auto;height:auto;--${He.name}:0\n}:host([hidden]), .host[hidden]{display:none\n} .container{position:relative;width:100%;height:100%;display:grid;${t}} cell:empty{position:relative;line-height:1;display:grid;place-items:center\n} svg{position:absolute;width:100%;height:100%;}`}function Mt({x:e,y:t}){return`\n:host, .host{grid-template-rows:repeat(${t}, 1fr);grid-template-columns:repeat(${e}, 1fr);}`}function Ct(e,t,n){let r=document.createElement("cell");return r.id=U(e,t,n),r}function Lt({x:e,y:t,z:n}){let r=document.createElement("grid"),i=document.createDocumentFragment();if(1==n)for(let n=1;n<=t;++n)for(let t=1;t<=e;++t)i.appendChild(Ct(t,n,1));else{let e=null;for(let t=1;t<=n;++t){let n=Ct(1,1,t);(e||i).appendChild(n),e=n}e=null}return r.className="container",r.appendChild(i),r.outerHTML}customElements.get("css-doodle")||customElements.define("css-doodle",Rt);return B((e=>{let t=document.createElement("css-doodle");return t.update&&t.update(e),t}))}));

两个文件放在同一文件夹内，打开index.html即可看到特效。