Javascript 扩展can'；t访问窗口对象中的自定义函数

当Chrome扩展试图通过Chrome.executeScript在window对象中获取自定义函数时，它什么也得不到

例如：

标签编号：150

选项卡js：

window.customfunc = function(){return 'yeap';}

扩展的背景JS:

chrome.tabs.executeScript(150, { code: "console.log(window);" })

{
   "background": {
      "scripts": [ "background.js" ]
   },
   "content_scripts": [ {
      "exclude_globs": [  ],
      "exclude_matches": [  ],
      "include_globs": [ "*://*/*" ],
      "js": [ "script.js" ],
      "matches": [ "http://*/*" ],
      "run_at": "document_idle"
   } ],
   "content_security_policy": "script-src 'self' https://ssl.google-analytics.com; object-src 'self'",
   "description": "Test",
   "manifest_version": 2,
   "name": "Workspace",
   "permissions": [ "unlimitedStorage", "notifications", "clipboardWrite", "notifications", "clipboardRead", "management", "tabs", "history", "cookies", "idle", "storage", "webRequest", "webRequestBlocking", "contentSettings", "*://*/*" ],
   "version": "1.0"
}

Manifest.json:

chrome.tabs.executeScript(150, { code: "console.log(window);" })

{
   "background": {
      "scripts": [ "background.js" ]
   },
   "content_scripts": [ {
      "exclude_globs": [  ],
      "exclude_matches": [  ],
      "include_globs": [ "*://*/*" ],
      "js": [ "script.js" ],
      "matches": [ "http://*/*" ],
      "run_at": "document_idle"
   } ],
   "content_security_policy": "script-src 'self' https://ssl.google-analytics.com; object-src 'self'",
   "description": "Test",
   "manifest_version": 2,
   "name": "Workspace",
   "permissions": [ "unlimitedStorage", "notifications", "clipboardWrite", "notifications", "clipboardRead", "management", "tabs", "history", "cookies", "idle", "storage", "webRequest", "webRequestBlocking", "contentSettings", "*://*/*" ],
   "version": "1.0"
}

结果：

chrome.tabs.executeScript(150, { code: "console.log(window);" })

{
   "background": {
      "scripts": [ "background.js" ]
   },
   "content_scripts": [ {
      "exclude_globs": [  ],
      "exclude_matches": [  ],
      "include_globs": [ "*://*/*" ],
      "js": [ "script.js" ],
      "matches": [ "http://*/*" ],
      "run_at": "document_idle"
   } ],
   "content_security_policy": "script-src 'self' https://ssl.google-analytics.com; object-src 'self'",
   "description": "Test",
   "manifest_version": 2,
   "name": "Workspace",
   "permissions": [ "unlimitedStorage", "notifications", "clipboardWrite", "notifications", "clipboardRead", "management", "tabs", "history", "cookies", "idle", "storage", "webRequest", "webRequestBlocking", "contentSettings", "*://*/*" ],
   "version": "1.0"
}

在控制台中，

窗口

对象不显示

customfunc

，因此我们不能将

window.customfunc

与

chrome.executeScript

一起使用

为什么会发生这种情况，我们如何解决它？

---

谢谢。

这是为了安全。内容脚本（正在执行的

background.js

）与选项卡的脚本（其中定义了

customfunc

）隔离。您还可以获得不必担心名称空间冲突的额外好处（这正是您将事情搞砸的地方）

一种方法是创建
myscript.js上面写着

console.log（窗口）

然后使用内容脚本（或

chrome.tabs.executeScript

）编写

到选项卡的DOM。您还需要添加

“web可访问资源”：[“myscript.js”]

到你的舱单

但是有了这么复杂的事情，一个好问题是为什么需要访问

customfunc

。（您还可以查看以获得更长的答案。）