我的CSS不是通过我的内容脚本注入 [英] My CSS is not getting injected through my content script

问题描述

任何人都可以向我解释这个问题。我试图注入一个CSS文件到网页使用content_script与谷歌扩展，但我的CSS文件从来没有添加到网页。有人能告诉我我做错了什么，帮我修复它吗？感谢

Can anyone explain this to me. I'm trying to inject a CSS file onto a webpage using the content_script with Google extensions, but my css file never gets added to the webpage. Can someone tell me what I'm doing wrong and help me fix it? thanks

清单：

{
  "name": "Extension",
  "version": "0",
  "description": "",


  "permissions": ["tabs", "http://*/*", "https://*/*", "file:///*/*"],
    "content_scripts": [
    {
        "matches": [ "http://*/*", "https://*/*", "file:///*/*"],
        "css": ["myStyles.css"],
        "js": ["myScript.js"],
        "all_frames": true
    }
  ]
}

myStyles.css

myStyles.css

#test {
    margin: 0 10px;
    background: #fff;
    padding: 3px;
    color: #000;
}

推荐答案

，但不适用，因为其他样式会覆盖规则。要使规则生效，您可以使用以下选项：

The style sheet is actually injected, but not applied, because other styles override the rules. To get the rules to work, you have some options:

1. 增加特殊性。



2. 用！重要后缀每个规则：

#test {
    margin: 0 10px !important;
    background: #fff !important;
    padding: 3px !important;
    color: #000 !important;
}

通过内容脚本注入CSS：

Inject the CSS via a content script:

myScript.js ：

var style = document.createElement('link');
style.rel = 'stylesheet';
style.type = 'text/css';
style.href = chrome.extension.getURL('myStyles.css');
(document.head||document.documentElement).appendChild(style);

manifest.json

{
  "name": "Extension",
  "version": "0",
  "description": "",
  "manifest_version": 2,
  "permissions": ["tabs", "http://*/*", "https://*/*", "file:///*/*"],
    "content_scripts": [
    {
        "matches": [ "http://*/*", "https://*/*", "file:///*/*"],
        "js": ["myScript.js"],
        "all_frames": true
    }
  ],
  "web_accessible_resources": ["myStyles.css"]
}

清单版本 2需要最后一个键 web_accessible_resources 是活动的，因此可以从非扩展页面读取CSS文件。

The last key, web_accessible_resources is necessary when manifest version 2 is active, so that the CSS file can be read from a non-extension page.

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