使用vue+element开发一个谷歌插件

document.getElementById('button').onclick = function() {
    alert(document.getElementById('name').value)
}

html中：

<input id="name" placeholder="请输入"/>
<input id="button" type="button" value="点击"/>
<script src="js/index.js"></script>

刷新插件

一个嵌入网页中的悬浮框
上述例子是点击icon浏览器右上角出现的小弹窗，

引入vue.js、element-ui
    下载合适版本的vue.js和element-ui等插件，同样按照index.js一样的操作引入，如果没有下载单独js文件的地址，可以打开cdn地址直接将压缩后的代码复制。
manifest.json中添加：

"content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "css/index.css"
      ],
      "js": [
        "js/vue.js",
        "js/element.js",
        "js/index.js"
      ],
      "run_at": "document_idle"
    }
  ],

在index.js文件：
这里使用在head里插入link 的方式引入element-ui的css，减少插件包的一点大小，当然也可以像引入index.js那样在manifest.json中引入。
直接在index.js文件中写Vue实例，不过首先得创建挂载实例的节点：

let element = document.createElement('div')
let attr =  document.createAttribute('id')
attr.value = 'appPlugin'
element.setAttributeNode(attr)
document.getElementsByTagName('body')[0].appendChild(element)

let link = document.createElement('link')
let linkAttr =  document.createAttribute('rel')
linkAttr.value = 'stylesheet'
let linkHref =  document.createAttribute('href')
linkHref.value = 'https://unpkg.com/element-ui/lib/theme-chalk/index.css'
link.setAttributeNode(linkAttr)
link.setAttributeNode(linkHref)
document.getElementsByTagName('head')[0].appendChild(link)


const vue = new Vue({
    el: '#appPlugin',
    template:`
      <div class="app-plugin-content">{{text}}{{icon_post_message}}<el-button @click="Button">Button</el-button></div>
    `,
    data: function () {
        return { text: 'hhhhhh', icon_post_message: '_icon_post_message', isOcContentPopShow: true }
    },
    mounted() {
        console.log(this.text)
    },
    methods: {
        Button() {
            this.isOcContentPopShow = false
        }
    }
})

让我们来写一个简易替换网页背景颜色工具

index.js：

let element = document.createElement('div')
let attr = document.createAttribute('id')
attr.value = 'appPlugin'
element.setAttributeNode(attr)
document.getElementsByTagName('body')[0].appendChild(element)

let link = document.createElement('link')
let linkAttr = document.createAttribute('rel')
linkAttr.value = 'stylesheet'
let linkHref = document.createAttribute('href')
linkHref.value = 'https://unpkg.com/element-ui/lib/theme-chalk/index.css'
link.setAttributeNode(linkAttr)
link.setAttributeNode(linkHref)
document.getElementsByTagName('head')[0].appendChild(link)


const vue = new Vue({
    el: '#appPlugin',
    template: `
        <div v-if="isOcContentPopShow" class="oc-move-page" id="oc_content_page">
            <div class="oc-content-title" id="oc_content_title">颜色 <el-button type="text" icon="el-icon-close" @click="close"></el-button></div>
            <div class="app-plugin-content">背景：<el-color-picker v-model="color1"></el-color-picker></div>
            <div class="app-plugin-content">字体：<el-color-picker v-model="color2"></el-color-picker></div>
        </div>
    `,
    data: function () {
        return { color1: null, color2: null, documentArr: [], textArr: [], isOcContentPopShow: true }
    },
    watch: {
        color1(val) {
            let out = document.getElementById('oc_content_page')
            let outC = document.getElementsByClassName('el-color-picker__panel')
            this.documentArr.forEach(item => {
                    if(!out.contains(item) && !outC[0].contains(item) && !outC[1].contains(item)) {
                        item.style.cssText = `background-color: ${val}!important;color: ${this.color2}!important;`
                    }
            })
        },
        color2(val) {
            let out = document.getElementById('oc_content_page')
            let outC = document.getElementsByClassName('el-color-picker__panel')[1]
            this.textArr.forEach(item => {
                if(!out.contains(item) && !outC.contains(item)) {
                        item.style.cssText = `color: ${val}!important;`
                    }
            })
        }
    },
    mounted() {
        chrome.runtime.onConnect.addListener((res) => {
            if (res.name === 'testPlugin') {
                res.onMessage.addListener(mess => {
                    this.isOcContentPopShow = mess.isShow
                })
            }
        })
        this.$nextTick(() => {
            let bodys = [...document.getElementsByTagName('body')]
            let headers = [...document.getElementsByTagName('header')]
            let divs = [...document.getElementsByTagName('div')]
            let lis = [...document.getElementsByTagName('li')]
            let articles = [...document.getElementsByTagName('article')]
            let asides = [...document.getElementsByTagName('aside')]
            let footers = [...document.getElementsByTagName('footer')]
            let navs = [...document.getElementsByTagName('nav')]
            this.documentArr = bodys.concat(headers, divs, lis, articles, asides, footers, navs)

            let as = [...document.getElementsByTagName('a')]
            let ps = [...document.getElementsByTagName('p')]
            this.textArr = as.concat(ps)

        })

    },
    methods: {
        close() {
            this.isOcContentPopShow = false
        }
    }
})

index.html:

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>my plugin</title>
  <link rel="stylesheet" href="css/index.css">
</head>

<body>
  <div class="plugin">
    <input id="plugin_button" type="button" value="打开" />
  </div>
</body>
<script src="js/icon.js"></script>

</html>

新建icon.js：

plugin_button.onclick = function () {
  mess()
}
async function mess () {
  const tabId = await getCurrentTabId()
  const connect = chrome.tabs.connect(tabId, {name: 'testPlugin'});
  connect.postMessage({isShow: true})
}
function getCurrentTabId() {
  return new Promise((resolve, reject) => {
      chrome.tabs.query({ active: true, currentWindow: true }, function (tabs) {
          resolve(tabs.length ? tabs[0].id : null)
      });
  })
}

新建index.css:

.oc-move-page{
  width: 100px; 
  height: 200px; 
  background: white; 
  box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.12);
  border-radius: 8px;
  position: fixed; 
  transform: translateY(-50%);
  right: 0; 
  top: 50%; 
  z-index: 1000001;
}
.oc-move-page .oc-content-title{
  text-align: left; 
  padding: 12px 16px;
  font-weight: 600;
  font-size: 18px;
  border-bottom: 1px solid #DEE0E3;
}
.oc-move-page .app-plugin-content {
  display: flex;
  align-items: center;
  margin-top: 10px;
}

.el-color-picker__panel {
  right: 100px!important;
  left: auto!important;
}

这样一个小尝试就完成了，当然如果有更多需求可以结合本地存储或者服务端来协作。

本文链接：https://blog.csdn.net/qq_26769677/article/details/116611072