使用content.js [Chrome EXTENSION]注入自定义CSS不起作用

yebdmbv4 于 2023-09-28 发布在 Go

关注(0)|答案(1)|浏览(130)

我创建了一个Chrome扩展，用于更改某些网站的默认字体。

manifest.json

{
  "name": "Custom Font",
  "version": "0.0.1",
  "description": "A Extension to change default Fonts.",
  "manifest_version": 3,
  "content_scripts": [
    {
      "matches": ["https://dev.to/*", "https://github.com/*"],
      "js": ["main.js"] // content.js
    }
  ]
}

main.js

const head = document.head || document.getElementsByTagName('head')[0];

const link = document.createElement('link');
link.rel = 'stylesheet';

if (window.location.href.includes('https://dev.to')) {
  link.href = chrome.runtime.getURL('devTo.css');
}
if (window.location.href.includes('https://github.com')) {
  link.href = chrome.runtime.getURL('github.css');
}

head.appendChild(link);

但当我尝试在上述网站中运行上述代码时，它给了我一个错误：
GET chrome-extension://invalid/ net::ERR_FAILED

google-chrome

来源：https://stackoverflow.com/questions/71455272/injecting-custom-css-with-content-js-chrome-extension-is-not-working

1条答案

按热度按时间

7vux5j2d1#

如果您想从JavaScript内容脚本（在Chrome扩展清单v3中）动态添加样式。你可以这样做：
如果您希望为用户提供随时启用/禁用样式表的选项，那么动态添加样式表是一个不错的主意。例如，使用选项页。

manifest.json

{
    "name": "Inject Style",
    "action": {},
    "manifest_version": 3,
    "version": "0.1",
    "description": "Inject the stylesheet from content script",
    "content_scripts": [
        {
            "matches": ["https://dev.to/*", "https://github.com/*"],
            "js": ["main.js"]
        }
    ],
    "permissions": ["activeTab"],
    "host_permissions": ["<all_urls>"],
    "web_accessible_resources": [
        {
            "resources": [ "devTo.css"],
            "matches": [ "https://dev.to/*" ]
        },
        {
            "resources": [ "github.css"],
            "matches": [ "https://github.com/*" ]
        }
    ]
}

main.js（内容脚本）

function addstylesheet(filename){
    var link = document.createElement("link");
    link.href = chrome.runtime.getURL(filename);
    link.type = "text/css";
    link.rel = "stylesheet";
    document.getElementsByTagName("head")[0].appendChild(link);
}
    
if(window.location.href.match(/(https:\/\/(.*github\.com\/.*))/i)) {
    addstylesheet("github.css");
} else if(window.location.href.match(/(https:\/\/(.*dev\.to\/.*))/i) {
    addstylesheet("devTo.css");
}

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我来回答

使用content.js [Chrome EXTENSION]注入自定义CSS不起作用

1条答案

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