JavaScript
vue+element开发一个谷歌插件的全过程
简单功能:点击浏览器右上角插件icon弹出小弹窗,点击设置弹出设置页,并替换背景图或颜色。
开始
1.本地创建文件夹testPlugin并新建manifest.json文件
{ "name": "testPlugin", "description": "这是一个测试用例", "version": "0.0.1", "manifest_version": 2 }
2.添加插件的小icon
testPlugin下创建icons文件夹,可以放入一些不同尺寸的icon,测试可以偷懒都放一种尺寸的icon。修改manifest.json为:
{ "name": "testPlugin", "description": "这是一个测试用例", "version": "0.0.1", "manifest_version": 2, "icons": { "16": "icons/16.png", "48": "icons/16.png" } }
这时候在扩展程序中加载已解压的程序(就是我们创建的文件夹),就可以看到雏形了:
3.选择性地添加点击插件icon浏览器右上角弹出来的框
"browser_action": { "default_title": "test plugin", "default_icon": "icons/16.png", "default_popup": "index.html" }
testPlugin创建index.html文件:
<!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="请输入"/> </body> </html>
刷新插件,这时候点击浏览器中刚刚添加的插件的icon,就会弹出:
4.js事件(样式同理)
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,这时候点击浏览器中刚刚添加的插件的icon,就会弹出输入框中的值:
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) }); }) }
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。
总结
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