vue+element開發一個谷歌外掛的全過程
簡單功能:點選瀏覽器右上角外掛icon彈出小彈窗,點選設定彈出設定頁,並替換背景圖或顏色。
開始
1.本地建立資料夾testPlugin並新建manifest.json檔案
{ "name": "testPlugin","description": "這是一個測試用例","version": "0.0.1","manife程式設計客棧st_version": 2 }
2.新增外掛的小icon
testPlugin下建立icons資料夾,可以放入一些不同尺寸的icon,測試可以偷懶都放一種尺寸的icon。修改manifest.json為:
{ "name": "testPlugin","manifest_version": 2,"icons": { "16": "icons/16.png","48": "icons/16.png" } }
這時候在擴充套件程式中載入已解壓的程式(就是我們建立的資料夾),就可以看到雛形了:
3.選擇性地新增點選外掛icon瀏覽器右上角彈出來的框
"browser_action": { "default_title": "test plugin","default_icon": "icons/16.png","default_popup": "index.html" }
testPlugin建立index.html檔案:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width,initial-scale=1.0"> <title>test plugin</title> </head> <body> <input id="name" placeholder="請輸入"/> </body> </html>
重新整理外掛,這時候點選瀏覽器中剛剛新增的外掛的icon,就會彈出:
4.js事件(樣式同理)
document.getElementById('button').onclick = function() { alert(document.getElementById('name').value) }
html中:
<input id="name" placeholder="請輸入"/> <input id="button" type="button" value="點選"/> <script src="js/index.js"></script>
重新整理外掛,這時候點選瀏覽器中剛剛新增的外掛的icon,就會彈出輸入框中的值:
一個嵌入網頁中的懸浮框
上述例子是點選icon瀏覽器右上角出現的小彈窗,
引入vue.js、element-ui
下載合適版本的vue.js和element-ui等外掛,同樣按照index.js一樣的操作引入,如果沒有下載單獨js檔案的地址,可以開啟cdn地址直接將壓縮後的程式碼複製。
manifest.json中新增:
"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檔案:
這裡使用在head裡插入link 的方式引入element-ui的css,減少外掛包的一點大小,當然也可以像引入index.js那樣在manifest.json中引入。
直接在index.js檔案中寫Vue例項,不過首先得建立掛載例項的節點:
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 } } })
讓我們來寫一個簡易替換網頁背景顏色工具
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">顏色 <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>
<www.cppcns.comdiv class="app-plugin-content">字型:<el-colowww.cppcns.comr-picker v-model="color2"></el-color-picker></div>
</div>
`,data: function () {
return { color1: null,color2: null,documentArr: [],textArr: [],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}!imporhttp://www.cppcns.comtant;`
}
})
},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 nhttp://www.cppcns.comame="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="開啟" />
</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) }); }) }
這樣一個小嚐試就完成了,當然如果有更多需求可以結合本地儲存或者服務端來協作。
總結
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