云间玉兔,自出机抒,从零开始制作Web插件网页特效小兔子组件(小挂件widget),基于原生CSS/NPM

著意登楼瞻玉兔，何人张幕遮银阙？又到了一年一度的网页小挂件环节，以往我们都是集成别人开源的组件，但所谓熟读唐诗三百首，不会做诗也会吟，熟读了别人的东西，做几首打油诗也是可以的，但若不能自出机抒，却也成不了大事，所以本次我们从零开始制作属于自己的网页小挂件，博君一晒。

玉兔主题元素绘制

成本最低的绘制方式是使用纯CSS，不依赖任何图片和三方库，首先创建绘制容器：

<div id="rabbit_box">  

</div>

由于是小挂件，我们首先将容器固定在右下角：

#rabbit_box{  

    position: fixed;
    bottom: var(--pos,5%);
    right: 35px;
    z-index: 99;
    border: none;
    outline: none;
    filter: drop-shadow(3px 5px 2px rgb(0 0 0 / 0.4));  

  }

这里加了一层filter滤镜，可以让玉兔更加立体。

考虑到复用性和可移植性，将主题元素动态添加到容器中：

function rabbit_init(){  

    var container = document.getElementById("rabbit_box");  

    container.innerHTML = '<div class="rabbit"><div class="rabbit__leg rabbit__leg--one"></div><div class="rabbit__leg rabbit__leg--two"></div><div class="rabbit__tail"></div><div class="rabbit__body"></div><div class="rabbit__leg rabbit__leg--three"></div><div class="rabbit__leg rabbit__leg--four"></div><div class="rabbit__ear rabbit__ear--right"></div><div class="rabbit__head"></div><div class="rabbit__ear rabbit__ear--left"></div></div>';  

}  

rabbit_init()

这里玉兔元素由八个小组件构成，分别是头部，四肢，四爪，两只耳朵，眼睛，尾巴以及嘴。

随后设置CSS样式：

.rabbit .rabbit__body {
    width: 4em;
    height: 5.6em;
    background: #F4F4F4;
    border-radius: 50% 50% 50% 50%/60% 60% 40% 40%;
    transform: rotate(-40deg);
    box-shadow: inset -2.3em -2.7em 0 0 var(--theme-color,#D2DAEE);
  }

兔子身体元素通过border-radius来获得圆润的曲线，同时使用transform旋转元素得到一个适合的角度。最后通过box-shadow属性来设置颜色，颜色可以自定义，如果没有自定义则使用默认值#D2DAEE，注意旋转角度需要指定单位：deg。

接着绘制头部：

.rabbit .rabbit__head {
    position: absolute;
    width: 4em;
    height: 4.6em;
    top: -2.5em;
    left: -2em;
    background: var(--theme-color,#e1e6f4);
    border-radius: 50% 50% 50% 50%/65% 60% 40% 35%;
    transform: rotate(-120deg);
    overflow: hidden;
  }
  .rabbit .rabbit__head:before {
    content: "";
    position: absolute;
    width: 0.65em;
    height: 0.5em;
    top: -0.1em;
    left: 1.8em;
    background: #F97996;
    border-radius: 50% 50% 50% 50%/30% 30% 70% 70%;
    transform: rotate(130deg);
  }
  .rabbit .rabbit__head:after {
    content: "";
    position: absolute;
    width: 1em;
    height: 1em;
    top: 1.5em;
    left: 1.6em;
    background: #F4F4F4;
    border-radius: 50%;
    box-shadow: inset 0.1em 0.15em 0 0.37em #e2262e;
  }

这里通过::before 和 ::after 伪元素在兔子头部元素的前面或后面插入内容，头部前面绘制兔嘴，后面则插入兔子眼睛，之所以这样控制，是因为可以灵活的使用box-shadow填充颜色。

接着绘制耳朵：

.rabbit .rabbit__ear {
    position: absolute;
    border-radius: 50% 50% 50% 50%/40% 40% 60% 60%;
    transform-origin: 50% 100%;
  }
  .rabbit .rabbit__ear--left {
    width: 2.2em;
    height: 4.7em;
    top: -5.7em;
    left: -0.2em;
    background: #F3E3DE;
    transform: rotate(60deg);
    box-shadow: inset 0.3em -0.4em 0 -0.1em var(--theme-color,#c7d1ea);
    -webkit-animation: ear-left 3s infinite ease-out;
            animation: ear-left 3s infinite ease-out;
  }
  .rabbit .rabbit__ear--right {
    width: 2em;
    height: 4.7em;
    top: -5.5em;
    left: -0.7em;
    background: var(--theme-color,#D2DAEE);
    transform: rotate(20deg);
    -webkit-animation: ear-right 3s infinite ease-out;
            animation: ear-right 3s infinite ease-out;
  }

@-webkit-keyframes ear-left {
    0%, 20%, 100% {
      transform: rotate(40deg);
    }
    10%, 30%, 80% {
      transform: rotate(45deg);
    }
    90% {
      transform: rotate(50deg);
    }
  }  

  @keyframes ear-left {
    0%, 20%, 100% {
      transform: rotate(40deg);
    }
    10%, 30%, 80% {
      transform: rotate(45deg);
    }
    90% {
      transform: rotate(50deg);
    }
  }
  @-webkit-keyframes ear-right {
    0%, 20%, 100% {
      transform: rotate(10deg);
    }
    10%, 30%, 80% {
      transform: rotate(5deg);
    }
    90% {
      transform: rotate(0deg);
    }
  }
  @keyframes ear-right {
    0%, 20%, 100% {
      transform: rotate(10deg);
    }
    10%, 30%, 80% {
      transform: rotate(5deg);
    }
    90% {
      transform: rotate(0deg);
    }
  }

这里通过-webkit-animation属性让兔子左右耳在3秒内进行来回摆动，达到一种动态效果，注意左耳内侧颜色固定为：#F3E3DE，同时动画会影响元素的布局，需要注意元素的宽高。

最后就是四肢和尾巴：

.rabbit .rabbit__leg {
    position: absolute;
  }
  .rabbit .rabbit__leg--one {
    width: 0.8em;
    height: 3em;
    top: 2.3em;
    left: 0.2em;
    background: var(--theme-color,#c7d1ea);
    border-radius: 50% 50% 50% 50%/30% 30% 70% 70%;
    transform-origin: 50% 0%;
    transform: rotate(15deg);
  }
  .rabbit .rabbit__leg--one:before {
    content: "";
    position: absolute;
    width: 0.8em;
    height: 0.5em;
    top: 2.6em;
    left: -0.2em;
    background: #f3f6ff;
    border-radius: 50% 50% 50% 50%/70% 70% 30% 30%;
    transform: rotate(-10deg);
  }
  .rabbit .rabbit__leg--three {
    width: 0.9em;
    height: 3em;
    top: 2.4em;
    left: 0.7em;
    background: var(--theme-color,#e1e6f4);
    border-radius: 50% 50% 50% 50%/30% 30% 70% 70%;
    transform-origin: 50% 0%;
    transform: rotate(10deg);
  }
  .rabbit .rabbit__leg--three:before {
    content: "";
    position: absolute;
    width: 0.8em;
    height: 0.5em;
    top: 2.6em;
    left: -0.2em;
    background: #f3f6ff;
    border-radius: 50% 50% 50% 50%/70% 70% 30% 30%;
    transform: rotate(-10deg);
  }
  .rabbit .rabbit__leg--two {
    width: 2.6em;
    height: 3.6em;
    top: 1.7em;
    left: 1.6em;
    background: #c7d1ea;
    border-radius: 50% 50% 50% 50%/50% 50% 50% 50%;
    transform-origin: 50% 0%;
    transform: rotate(10deg);
  }
  .rabbit .rabbit__leg--two:before {
    content: "";
    position: absolute;
    width: 1.6em;
    height: 0.8em;
    top: 3.05em;
    left: 0em;
    background: #f3f6ff;
    border-radius: 50% 50% 50% 50%/70% 70% 30% 30%;
    transform: rotate(-10deg);
  }
  .rabbit .rabbit__leg--four {
    width: 2.6em;
    height: 3.6em;
    top: 1.8em;
    left: 2.1em;
    background: var(--theme-color,#e1e6f4);
    border-radius: 50% 50% 50% 50%/50% 50% 50% 50%;
    transform-origin: 50% 0%;
    transform: rotate(10deg);
  }
  .rabbit .rabbit__leg--four:before {
    content: "";
    position: absolute;
    width: 1.6em;
    height: 0.8em;
    top: 3.05em;
    left: 0em;
    background: #f3f6ff;
    border-radius: 50% 50% 50% 50%/70% 70% 30% 30%;
    transform: rotate(-10deg);
  }
  .rabbit .rabbit__tail {
    position: absolute;
    width: 0.9em;
    height: 0.9em;
    top: 3.7em;
    left: 4em;
    background: var(--theme-color,#D2DAEE);
    transform: rotate(25deg);
  }
  .rabbit .rabbit__tail:after, .rabbit .rabbit__tail:before {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--theme-color,#D2DAEE);
    border-radius: 50%;
  }
  .rabbit .rabbit__tail:before {
    top: 0;
    left: -50%;
  }
  .rabbit .rabbit__tail:after {
    top: 50%;
    left: 0;
  }

这里四肢和四爪的颜色应该有差异，四肢颜色可以自定义，四爪固定为白色，以达到“四蹄踏雪”的效果。

接着改造初始化函数，使其可以动态更改颜色：

function rabbit_init(color=null,pos=null){  

    var container = document.getElementById("rabbit_box");  

    container.innerHTML = '<div class="rabbit"><div class="rabbit__leg rabbit__leg--one"></div><div class="rabbit__leg rabbit__leg--two"></div><div class="rabbit__tail"></div><div class="rabbit__body"></div><div class="rabbit__leg rabbit__leg--three"></div><div class="rabbit__leg rabbit__leg--four"></div><div class="rabbit__ear rabbit__ear--right"></div><div class="rabbit__head"></div><div class="rabbit__ear rabbit__ear--left"></div></div>';  

    if(color != null){  

        document.documentElement.style.setProperty("--theme-color",color);  

    }
    if(pos != null){  

        document.documentElement.style.setProperty("--pos",pos);  

    }  

}  

rabbit_init("pink")

最终效果：

开源发布

现在我们将这个开源特效打包上线，首先创建项目目录：

mkdir rabbit

随后将特效的样式CSS代码以及JS代码分别抽离出来：rabbit.css:

.rabbit {
    position: relative;
  }
  .rabbit .rabbit__body {
    width: 4em;
    height: 5.6em;
    background: #F4F4F4;
    border-radius: 50% 50% 50% 50%/60% 60% 40% 40%;
    transform: rotate(-40deg);
    box-shadow: inset -2.3em -2.7em 0 0 var(--theme-color,#D2DAEE);
  }
  .rabbit .rabbit__head {
    position: absolute;
    width: 4em;
    height: 4.6em;
    top: -2.5em;
    left: -2em;
    background: var(--theme-color,#e1e6f4);
    border-radius: 50% 50% 50% 50%/65% 60% 40% 35%;
    transform: rotate(-120deg);
    overflow: hidden;
  }
  .rabbit .rabbit__head:before {
    content: "";
    position: absolute;
    width: 0.65em;
    height: 0.5em;
    top: -0.1em;
    left: 1.8em;
    background: #F97996;
    border-radius: 50% 50% 50% 50%/30% 30% 70% 70%;
    transform: rotate(130deg);
  }
  .rabbit .rabbit__head:after {
    content: "";
    position: absolute;
    width: 1em;
    height: 1em;
    top: 1.5em;
    left: 1.6em;
    background: #F4F4F4;
    border-radius: 50%;
    box-shadow: inset 0.1em 0.15em 0 0.37em #e2262e;
  }
  .rabbit .rabbit__ear {
    position: absolute;
    border-radius: 50% 50% 50% 50%/40% 40% 60% 60%;
    transform-origin: 50% 100%;
  }
  .rabbit .rabbit__ear--left {
    width: 2.2em;
    height: 4.7em;
    top: -5.7em;
    left: -0.2em;
    background: #F3E3DE;
    transform: rotate(60deg);
    box-shadow: inset 0.3em -0.4em 0 -0.1em var(--theme-color,#c7d1ea);
    -webkit-animation: ear-left 3s infinite ease-out;
            animation: ear-left 3s infinite ease-out;
  }
  .rabbit .rabbit__ear--right {
    width: 2em;
    height: 4.7em;
    top: -5.5em;
    left: -0.7em;
    background: var(--theme-color,#D2DAEE);
    transform: rotate(20deg);
    -webkit-animation: ear-right 3s infinite ease-out;
            animation: ear-right 3s infinite ease-out;
  }
  .rabbit .rabbit__leg {
    position: absolute;
  }
  .rabbit .rabbit__leg--one {
    width: 0.8em;
    height: 3em;
    top: 2.3em;
    left: 0.2em;
    background: var(--theme-color,#c7d1ea);
    border-radius: 50% 50% 50% 50%/30% 30% 70% 70%;
    transform-origin: 50% 0%;
    transform: rotate(15deg);
  }
  .rabbit .rabbit__leg--one:before {
    content: "";
    position: absolute;
    width: 0.8em;
    height: 0.5em;
    top: 2.6em;
    left: -0.2em;
    background: #f3f6ff;
    border-radius: 50% 50% 50% 50%/70% 70% 30% 30%;
    transform: rotate(-10deg);
  }
  .rabbit .rabbit__leg--three {
    width: 0.9em;
    height: 3em;
    top: 2.4em;
    left: 0.7em;
    background: var(--theme-color,#e1e6f4);
    border-radius: 50% 50% 50% 50%/30% 30% 70% 70%;
    transform-origin: 50% 0%;
    transform: rotate(10deg);
  }
  .rabbit .rabbit__leg--three:before {
    content: "";
    position: absolute;
    width: 0.8em;
    height: 0.5em;
    top: 2.6em;
    left: -0.2em;
    background: #f3f6ff;
    border-radius: 50% 50% 50% 50%/70% 70% 30% 30%;
    transform: rotate(-10deg);
  }
  .rabbit .rabbit__leg--two {
    width: 2.6em;
    height: 3.6em;
    top: 1.7em;
    left: 1.6em;
    background: #c7d1ea;
    border-radius: 50% 50% 50% 50%/50% 50% 50% 50%;
    transform-origin: 50% 0%;
    transform: rotate(10deg);
  }
  .rabbit .rabbit__leg--two:before {
    content: "";
    position: absolute;
    width: 1.6em;
    height: 0.8em;
    top: 3.05em;
    left: 0em;
    background: #f3f6ff;
    border-radius: 50% 50% 50% 50%/70% 70% 30% 30%;
    transform: rotate(-10deg);
  }
  .rabbit .rabbit__leg--four {
    width: 2.6em;
    height: 3.6em;
    top: 1.8em;
    left: 2.1em;
    background: var(--theme-color,#e1e6f4);
    border-radius: 50% 50% 50% 50%/50% 50% 50% 50%;
    transform-origin: 50% 0%;
    transform: rotate(10deg);
  }
  .rabbit .rabbit__leg--four:before {
    content: "";
    position: absolute;
    width: 1.6em;
    height: 0.8em;
    top: 3.05em;
    left: 0em;
    background: #f3f6ff;
    border-radius: 50% 50% 50% 50%/70% 70% 30% 30%;
    transform: rotate(-10deg);
  }
  .rabbit .rabbit__tail {
    position: absolute;
    width: 0.9em;
    height: 0.9em;
    top: 3.7em;
    left: 4em;
    background: var(--theme-color,#D2DAEE);
    transform: rotate(25deg);
  }
  .rabbit .rabbit__tail:after, .rabbit .rabbit__tail:before {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--theme-color,#D2DAEE);
    border-radius: 50%;
  }
  .rabbit .rabbit__tail:before {
    top: 0;
    left: -50%;
  }
  .rabbit .rabbit__tail:after {
    top: 50%;
    left: 0;
  }  

  @-webkit-keyframes ear-left {
    0%, 20%, 100% {
      transform: rotate(40deg);
    }
    10%, 30%, 80% {
      transform: rotate(45deg);
    }
    90% {
      transform: rotate(50deg);
    }
  }  

  @keyframes ear-left {
    0%, 20%, 100% {
      transform: rotate(40deg);
    }
    10%, 30%, 80% {
      transform: rotate(45deg);
    }
    90% {
      transform: rotate(50deg);
    }
  }
  @-webkit-keyframes ear-right {
    0%, 20%, 100% {
      transform: rotate(10deg);
    }
    10%, 30%, 80% {
      transform: rotate(5deg);
    }
    90% {
      transform: rotate(0deg);
    }
  }
  @keyframes ear-right {
    0%, 20%, 100% {
      transform: rotate(10deg);
    }
    10%, 30%, 80% {
      transform: rotate(5deg);
    }
    90% {
      transform: rotate(0deg);
    }
  }  

  #rabbit_box{  

    position: fixed;
    bottom: var(--pos,5%);
    right: 35px;
    z-index: 99;
    border: none;
    outline: none;
    filter: drop-shadow(3px 5px 2px rgb(0 0 0 / 0.4));  

  }

rabbit.js代码：

(function (name, context, fn) {
    if (typeof module != 'undefined' && module.exports) {
        // Node 环境
        module.exports = fn();
    } else if (typeof context['define'] == 'function' && (context['define']['amd'] || context['define']['cmd'])) {
        // Require.js 或 Sea.js 环境
        define(fn);
    } else {
        // client 环境
        context[name] = fn();
    }
})('rabbit_init', this, function () {
    return function (color=null,pos=null) {  

        var container = document.getElementById("rabbit_box");  

    container.innerHTML = '<div class="rabbit"><div class="rabbit__leg rabbit__leg--one"></div><div class="rabbit__leg rabbit__leg--two"></div><div class="rabbit__tail"></div><div class="rabbit__body"></div><div class="rabbit__leg rabbit__leg--three"></div><div class="rabbit__leg rabbit__leg--four"></div><div class="rabbit__ear rabbit__ear--right"></div><div class="rabbit__head"></div><div class="rabbit__ear rabbit__ear--left"></div></div>';  

    if(color != null){  

        document.documentElement.style.setProperty("--theme-color",color);  

    }
    if(pos != null){  

        document.documentElement.style.setProperty("--pos",pos);  

    }  

    }
});

保存在项目的lib目录。

首先将项目提交到Github: https://github.com/zcxey2911/rabbit

随后运行命令填写NPM配置：

npm init

entry point 配置项填写你的入口文件：

entry point: ./lib/rabbit.js

登录NPM账号，随后发布：

npm login
npm publish

登录之前，最好将切换回默认源，否则无法登录：

npm config set registry=https://registry.npmjs.com

发布成功后，查看发布内容：https://www.npmjs.com/package/rabbit-widget

开源库引入和使用

首先需要引入模块，可以使用 CDN 直接引入或者通过 NPM 包的形式安装。

直接引入：

<!-- https://cdn.jsdelivr.net/gh/zcxey2911/rabbit@v1.0.0/lib/rabbit.css -->
<!-- https://cdn.jsdelivr.net/gh/zcxey2911/rabbit@v1.0.0/lib/rabbit.js -->  

<link
  rel="stylesheet"
  href="https://cdn.jsdelivr.net/gh/zcxey2911/rabbit@v1.0.0/lib/rabbit.css"
/>  

<div id="rabbit_box">
</div>  

<script>  

function init_rabbit(){  

 rabbit_init("pink","20%");  // 粉色 高度20%  

 //rabbit_init(); //默认颜色 默认位置  

}  

</script>  

<script
  async
  onload="init_rabbit()"
  src="https://cdn.jsdelivr.net/gh/zcxey2911/rabbit@v1.0.0/lib/rabbit.js"
></script>

NPM 包的形式安装：

// npm install --save rabbit-widget
import 'rabbit-widget/lib/rabbit.css';  

var rabbit_init = require('rabbit-widget');  

rabbit_init();

如果使用NPM导入模块的形式引入，请确保页面加载完毕之后执行再执行rabbit_init();，否则会报错：Uncaught TypeError: Cannot set properties of null (setting 'innerHTML')。

这里以Vue.js3.0组件为例子：

<template>
  <a-layout class="layout">
    <a-layout-header>
      <div class="logo" />  

      <ad_header />  

    </a-layout-header>
    <a-layout-content style="padding: 0 50px">
      <a-breadcrumb style="margin: 16px 0">
        <a-breadcrumb-item>广告平台</a-breadcrumb-item>
        <a-breadcrumb-item>首页</a-breadcrumb-item>  

      </a-breadcrumb>
      <div :style="{ background: '#fff', padding: '24px', minHeight: '280px' }">  

        这里是首页  

        <div id="rabbit_box"></div>  

    </div>
    </a-layout-content>
    <a-layout-footer style="text-align: center">
      在线广告平台
    </a-layout-footer>
  </a-layout>
</template>  

<script>  

import ad_header from './ad_header';  

import 'rabbit-widget/lib/rabbit.css';  

var rabbit_init = require('rabbit-widget');  

export default {
 data() {
    return {  

    }
  },
  //声明子组件
  components:{  

    'ad_header':ad_header  

  },
  methods:{  

  },
  created(){  

    this.$nextTick(() => {
    console.log("页面加载完啦~")  

    rabbit_init();
})  

  }  

}
</script>
<style>
.site-layout-content {
  min-height: 280px;
  padding: 24px;
  background: #fff;
}
#components-layout-demo-top .logo {
  float: left;
  width: 120px;
  height: 31px;
  margin: 16px 24px 16px 0;
  background: rgba(255, 255, 255, 0.3);
}
.ant-row-rtl #components-layout-demo-top .logo {
  float: right;
  margin: 16px 0 16px 24px;
}  

[data-theme='dark'] .site-layout-content {
  background: #141414;
}
</style>

项目中引入效果：

结语

奉上项目代码，与众亲同飨:https://github.com/zcxey2911/rabbit https://www.npmjs.com/package/rabbit-widget ，最后祝各位乡亲祥瑞玉兔，人机平安，愿诸君2023年武运昌隆，前端一统。