术语“背景页面”,“弹出窗口”,“内容脚本”仍然让您感到困惑;我强烈建议您更深入地了解GoogleChrome扩展程序文档 。
关于您的问题,内容脚本或后台页面是不是要走的路:
内容脚本 :绝对地, 内容脚本是扩展程序中有权访问网页DOM的唯一组件。
后台页面/弹出窗口 :也许(可能最多两个)之一,您可能需要让内容脚本将DOM内容传递给后台页面或弹出窗口以进行进一步处理。
让我重复一遍,我强烈建议您对可用文档进行更仔细的研究!就是说,这里是一个示例扩展,它检索StackOverflow页面上的DOM内容并将其发送到后台页面,然后在控制台中将其打印出来:
background.js:
// Regex-pattern to check URLs against. // It matches URLs like: http[s]://[...]stackoverflow.com[...]var urlRegex = /^https?://(?:[^./?#]+.)?stackoverflow.com/;// A function to use as callbackfunction doStuffWithDom(domContent) { console.log('I received the following DOM content:n' + domContent);}// When the browser-action button is clicked...chrome.browserAction.onClicked.addListener(function (tab) { // ...check the URL of the active tab against our pattern and... if (urlRegex.test(tab.url)) { // ...if it matches, send a message specifying a callback too chrome.tabs.sendMessage(tab.id, {text: 'report_back'}, doStuffWithDom); }});content.js:
// Listen for messageschrome.runtime.onMessage.addListener(function (msg, sender, sendResponse) { // If the received message has the expected format... if (msg.text === 'report_back') { // Call the specified callback, passing // the web-page's DOM content as argument sendResponse(document.all[0].outerHTML); }});manifest.json:
{ "manifest_version": 2, "name": "Test Extension", "version": "0.0", ... "background": { "persistent": false, "scripts": ["background.js"] }, "content_scripts": [{ "matches": ["*://*.stackoverflow.com/*"], "js": ["content.js"] }], "browser_action": { "default_title": "Test Extension" }, "permissions": ["activeTab"]}


