Chrome扩展程序-获取DOM内容

Question

我正在尝试从弹出窗口中访问activeTab DOM内容。这是我的清单：{  "manifest_version": 2,  "name": "Test",  "description": "Test script",  "version": "0.1",  "permissions": [    "activeTab",    "https://api.domain.com/"  ],  "background": {    "scripts": ["background.js"],    "persistent": false  },  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",  "browser_action": {    "default_icon": "icon.png",    "default_title": "Chrome Extension test",    "default_popup": "index.html"  }}我真的很困惑，背景脚本（持久性事件页：false）还是content_scripts是可行的方法。我已经阅读了所有文档和其他SO帖子，但对我来说仍然没有意义。有人可以解释为什么我可能会在另一个上使用。这是我一直在尝试的background.js：chrome.extension.onMessage.addListener(  function(request, sender, sendResponse) {    // LOG THE CONTENTS HERE    console.log(request.content);  });我只是从弹出控制台执行此操作：chrome.tabs.getSelected(null, function(tab) {  chrome.tabs.sendMessage(tab.id, { }, function(response) {    console.log(response);  });});我越来越：Port: Could not establish connection. Receiving end does not exist. 更新：{  "manifest_version": 2,  "name": "test",  "description": "test",  "version": "0.1",  "permissions": [    "tabs",    "activeTab",    "https://api.domain.com/"  ],  "content_scripts": [    {      "matches": ["<all_urls>"],      "js": ["content.js"]    }  ],  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'",  "browser_action": {    "default_icon": "icon.png",    "default_title": "Test",    "default_popup": "index.html"  }}content.jschrome.extension.onMessage.addListener(  function(request, sender, sendResponse) {    if (request.text && (request.text == "getDOM")) {      sendResponse({ dom: document.body.innertHTML });    }  });popup.htmlchrome.tabs.getSelected(null, function(tab) {  chrome.tabs.sendMessage(tab.id, { action: "getDOM" }, function(response) {    console.log(response);  });});当我运行它时，我仍然遇到相同的错误：undefinedPort: Could not establish connection. Receiving end does not exist. lastError:30undefined

Answer 1

对于那些尝试gkalpak答案但没有效果的人，

请注意，只有在chrome启动过程中启用了扩展程序后，chrome才会将内容脚本添加到所需的页面，并且最好在进行这些更改后重新启动浏览器