我正在尝试从我的弹出窗口访问activeTab DOM内容。这是我的清单文件:
{
"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,是使用后台脚本(带有 persistence: false 的事件页面)还是内容脚本更好。我已经阅读了所有文档和其他 SO 帖子,但对我来说仍然毫无意义。
有人能解释一下为什么我可能会选择其中之一吗?
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);
}
);
我只是从弹出式控制台执行这个命令:
chrome.tabs.getSelected(null, function(tab) {
chrome.tabs.sendMessage(tab.id, { }, function(response) {
console.log(response);
});
});
我得到:
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"
}
}
内容.js
chrome.extension.onMessage.addListener(
function(request, sender, sendResponse) {
if (request.text && (request.text == "getDOM")) {
sendResponse({ dom: document.body.innerHTML });
}
}
);
弹出窗口.html
chrome.tabs.getSelected(null, function(tab) {
chrome.tabs.sendMessage(tab.id, { action: "getDOM" }, function(response) {
console.log(response);
});
});
当我运行它时,我仍然得到相同的错误:undefined
Port: Could not establish connection. Receiving end does not exist. lastError:30
undefined
chrome.runtime.sendMessage
可以向后台页(BackgroundPage)和弹出窗口(Popups)发送消息。而chrome.tabs.sendMessage
则可以向内容脚本(ContentScripts)发送消息。 - gkalpak