Question

我无法在current_script和后台之间构建有效的交换消息。错误消息是：

Error in event handler for 'undefined': Cannot read property 'farewell' of undefined TypeError: Cannot read property 'farewell' of undefined
at chrome-extension://lanofchlikjdallgfmhbbijdglepcomm/script.js:29:23
at <error: illegal access>
at Event.dispatchToListener (event_bindings:356:21)
at Event.dispatch_ (event_bindings:342:27)
at Event.dispatch (event_bindings:362:17)
at Object.chromeHidden.Port.dispatchOnDisconnect (miscellaneous_bindings:258:27)

我使用了Google API Simple one-time requests并拥有以下星座：

mainfest.json

{
  "manifest_version": 2,

  "name": "Facebook Cage",
  "description": "Facebook Cage hilft dir den Inhalt deiner Facebook Seite anzupassen.",
  "version": "1.0",

  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": ["popup.js"]
  },
  "content_scripts": [
    {
      "matches": ["https://www.facebook.com/*"],
      "js": ["script.js"]
    }
  ],
  "permissions": [
    "https://facebook.com/",
    "storage",
    "tabs"
  ]
}

的script.js

document.onclick = function (){
  if(document.URL=="https://www.facebook.com/"){
    chrome.runtime.sendMessage({greeting: "hello"}, function(response) {
      console.log(response.farewell);
    });  
  }
}

popup.js

chrome.storage.sync.get('url', function(result) {
  !!result['url'] ? $("#input-area").val(result['url']) : "";
});

$("#save").click(function() {
  chrome.storage.sync.set({'url': $("#input-area").val()});
  window.close();
  return(false);
});

chrome.runtime.onMessage.addListener(
  function(request, sender, sendResponse) {
    console.log(sender.tab ?
                "from a content script:" + sender.tab.url :
                "from the extension");
    if (request.greeting == "hello")
      sendResponse({farewell: "goodbye"});
  });

也许你可以帮忙，谢谢！

编辑：问题在于清单逻辑。我有三个组件：popup.js和script.js。 popup.js嵌入在popup.html中。 script.js作为内容脚本。遗漏的是背景逻辑，比如backgorund.js。只需输入代码

chrome.runtime.onMessage.addListener(
  function(request, sender, sendResponse) {
    console.log(sender.tab ?
                "from a content script:" + sender.tab.url :
                "from the extension");
    if (request.greeting == "hello")
      sendResponse({farewell: "goodbye"});
  });

在background.js中

并通过

将其链接到清单中

  "background": {
    "scripts": ["background.js"]
  },

总而言之，我最终删除了background.js中的后台登录，从那里也可以使用存储getter。

chrome.runtime.sendMessage中的<error：illegal =“”access =“”> </error：>

0 个答案: