firefox-addon-webextensions - TypeError : browser. webRequest 未定义

Question

这个问题在这里已经有了答案:





TypeError: [API] is undefined in content script or Why can't I do this in a content script?

(2 个回答)


4年前关闭。




我正在尝试使用 webextension 记录错误。我有以下简单的例子:
manifest.json :

{

  "manifest_version": 2,
  "name": "testOnErrorWebex",
  "version": "1.0",

  "description": "Adds a red border to all webpages matching mozilla.org.",

  "icons": {
    "48": "icons/border-48.png"
  },

  "content_scripts": [
    {
      "matches": ["<all_urls>"],
      "js": ["testOnErrorWebex.js"]
    }
  ],

  "permissions": [
  "webRequest"
]

}

并且，内容脚本: testOnErrorWebex.js

console.log("-- inside js file --");

var target = "<all_urls>"; 

/*
e.g., with no network:
"https://developer.mozilla.org/en-US/"
NS_ERROR_NET_ON_RESOLVED in Firefox
net::ERR_INTERNET_DISCONNECTED in Chrome
*/

function logError(responseDetails) {
  console.log("-- inside logError  --");
  console.log("inside logError");
  console.log(responseDetails.url);
  console.log(responseDetails.error);
}

browser.webRequest.onErrorOccurred.addListener(
  logError,
  {urls: [target]}
);

当我尝试扩展并加载它时，输入任何会引发错误的错误 URL:
例如， https://doesnotexist/
打印内容脚本中的以下行:

-- inside js file --

但我得到了这个错误:

TypeError: browser.webRequest is undefined

Answer 1

browser.webRequest在内容脚本中不可用。
请尝试更改 testOnErrorWebex.js在后台运行，您可以在以下更改的 list 中找到:

{

  "manifest_version": 2,
  "name": "testOnErrorWebex",
  "version": "1.0",
  "description": "Adds a red border to all webpages matching mozilla.org.",
  "background": {
    "scripts": ["testOnErrorWebex.js"]
  },
  "permissions": [
    "webRequest"
  ]
}