// background.js
chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
  console.log("Received message:", message);
  // 处理消息逻辑
  sendResponse({status: "received"});
});

// content-script.js
chrome.runtime.sendMessage({action: "doSomething"}, (response) => {
  console.log("Received response:", response);
});

{
  "manifest_version": 3,
  "background": {
    "service_worker": "background.js"
  },
  "content_scripts": [{
    "matches": ["<all_urls>"],
    "js": ["content-script.js"]
  }]
}

chrome.runtime.onMessage.addListener((message, sender, sendResponse) => {
  setTimeout(() => {
    sendResponse({data: "Async response"});
  }, 1000);
  return true; // 保持消息通道开放
});

{
  "permissions": ["scripting", "activeTab"]
}

try {
  chrome.runtime.onMessage.addListener(handler);
} catch (error) {
  console.error("Listener registration failed:", error);
}

chrome.runtime.sendMessage({...}, (response) => {
  if (chrome.runtime.lastError) {
    console.error(chrome.runtime.lastError);
  }
});