Question

我是Chrome扩展开发的新手，我想获取当前标签的内容。

我提到了this个问题。但我无法看到它的工作。

这是我的background.js：

chrome.tabs.onCreated.addListener(function(tab){
    console.log("Tab is been created " );
    console.log(tab);
    console.log(document.body.innerText)
});


chrome.tabs.onUpdated.addListener(function(tabId,changeInfo,tab){
    console.log(document.body.innerText)
});

chrome.tabs.onSelectionChanged.addListener(function(tabId,changeInfo,tab){  
chrome.tabs.getSelected(null,function(tab){
chrome.tabs.sendRequest(tab.id, {method: "getText"}, function (response) {
  console.log("Sending request ")
  alltext = response.data;
});
});
});

我的内容脚本如下：

chrome.extension.onRequest.addListener(function(request, sender, sendResponse) {
if (request.method == "getText")
{
  console.log("In the request method" +  document.all[0].innerText)
  sendResponse({data: document.all[0].innerText});
}
else 
{
  console.log("came here in the else blog")
  sendResponse({});
}
});

console.log("Loaded the content ")

日志语句Loaded the content（但我无法看到sendRequest函数中的日志，为什么？）正在控制台上打印，这意味着内容脚本正在加载。在扩展清单文件中，我给出了所有这样的URL：

"content_scripts": [
    {
      "matches": ["http://*/*","https://*/*"],
      "js": ["contentscript.js"]
    }
  ]

但我仍然无法获取当前标签的数据。我一直得到以下例外：

Error in event handler for (unknown): TypeError: Cannot read property 'data' of undefined
    at chrome-extension://gndneapginhhkepodhngcbcbknfjfobj/background.js:33:21
    at disconnectListener (extensions::messaging:338:9)
    at Function.target.(anonymous function) (extensions::SafeBuiltins:19:14)
    at Event.dispatchToListener (extensions::event_bindings:394:22)
    at Event.dispatch_ (extensions::event_bindings:378:27)
    at Event.dispatch (extensions::event_bindings:400:17)
    at dispatchOnDisconnect (extensions::messaging:293:27)

我犯了错误？

Answer 1

您是否注意到Request已被弃用，而不是“Message”。因此，您应使用onRequest和onMessage代替sendMessage而不是sendRequest。参见

Is chrome.extension.onRequest deprecated?

无法获取当前选项卡的数据

1 个答案: