如何更改后台文件（Chrome扩展程序）中的content_scripts？

Question

How can i change the CSS file declared in content_scripts (manifest.json)?
I need to change it from background.js (style.css to style2.css)
Is it possible to do that?
The manifest.json:

 { "manifest_version": 2, /* ... */ /* ... */ "background": { "scripts": [ "files/script/jquery-3.2.1.min.js", "files/script/background.js" ] }, "permissions": [ "tabs", "http://*/*", "https://*/*", "background", "browsingData", "cookies", "webRequest", "management", "storage" ], "content_scripts": [{ "matches": ["*"], "css": [ "files/css/style.css" ] }] } 

Answer 1

You cannot change declared CSS in the manifest file.
But in order to run custom CSS programmatically from background script, you can use chrome.tabs.insertCSS .

// use a file
chrome.tabs.insertCSS({file: "style2.css"});

// use a CSS string
chrome.tabs.insertCSS({code: "body { background: red }" });