无法读取未定义的属性“onBeforeNavigate”（Chrome 扩展）

Question

如果“onBeforeNavigate”上的操作发生，我只想触发扩展。 但是无缘无故的扩展总是会引发这个错误：

Cannot read property 'onBeforeNavigate' of undefined在此行chrome.webNavigation.onBeforeNavigate.addListener(setProxy);

到目前为止，这是我的代码：

popup.js

function setProxy(details){
    console.log("Got fired!\n");
}

chrome.webNavigation.onBeforeNavigate.addListener(setProxy);

manifest.json

{
  "manifest_version": 2,

  "name": "Proxy Changer",
  "description": "This extension Changes the Proxy settings every time you load a website",
  "version": "1.0",

  "browser_action": {
    "default_icon": "icon.png"
  },

  "permissions": [
    "activeTab",
    "webRequest",
    "notifications",
    "debugger",
    "background",
    "management",
    "https://ajax.googleapis.com/",
    "<all_urls>",
    "webRequestBlocking"
  ],

  "background": {
    "scripts": ["popup.js"],
    "persistent": true,
    "js": ["jQuery.js", "popup.js"]
  }
}

我不想说我对 Google Chrome 扩展程序 API 很陌生，但对我来说，扩展程序 API 不起作用......我不知道我做错了什么......我已经看过视频但仍然是同样的错误...... .

我会很感激你的帮助。 谢谢你和亲切的问候！

Answer 1

只需将“webNavigation”权限添加到 Manifest.json

{ "name": "我的扩展", ... "permissions": [ "webNavigation" ], ... }

请参阅文档https://developer.chrome.com/docs/extensions/reference/webNavigation/#event-onCreatedNavigationTarget