javascript - onBeforeRequest 未触发 : expected 'object' but got 'array'

Question

我试图让 onBeforeRequest 触发，但它不会触发一次。

background page console显示错误:

Invalid value for argument 1. Expected 'object' but got 'array'

ma​​nifest.json:

{
  "name": "Blocker",
  "version": "1.0",
  "description": "Blocks all websites",
  "permissions": ["webRequest", "webRequestBlocking", "<all_urls>"],
  "background": {
    "scripts": ["background.js"]
  },

  "manifest_version": 2
}

background.js:

chrome.webRequest.onBeforeRequest.addListener(
  function(info) {
    console.log("TRIGGERED")
    return {cancel: true};
  },
  // extraInfoSpec
  ["blocking"]);

我做错了什么或者我只是期待 onBeforeRequest 不应该做的事情？例如，我期望以下内容:

1. 我在地址栏中输入网址
2. 我按 Enter
3. onBeforeRequest 在网站显示之前触发
4. 用户收到网站被屏蔽的消息

Answer 1

根据documentation :

In addition to specifying a callback function, you have to specify a filter argument

chrome.webRequest.onBeforeRequest.addListener(
    function(info) {
        console.log(info);
        return {cancel: true};
    }, {
        urls: ['<all_urls>'],
    },
    ['blocking']
);