Question

我正在编写一个chrome扩展程序，只是在它警告Hello World我为权限指定的页面完成加载，但它不起作用，这是我的脚本

文件：manifest.json

{
  "name": "Hello",
  "version": "1.0",
  "description": "Says hello to Google",
  "permissions": ["http://*.google.com/"]
  "browser_action": {
    "popup": "Hello.html"
  }
}

文件：Hello.html

<script language="Javascript">
   alert("Hello World");
</script>

Answer 1

您正在添加一个浏览器操作弹出窗口，它会在浏览器的右上角添加一个按钮。（它可能是隐形的，因为你还没有为它指定一个图像。你的地址栏右侧应该有一些空白区域;尝试点击它以在弹出窗口中看到你的Hello.html。）

你想要的是content script。内容脚本可以注入Chrome加载的每个页面。您可以使用清单文件中的matches和exclude_matches子项来指定哪些页面可以获取您注入的脚本。

{
  "name": "Hello",
  "version": "1.0",
  "description": "Says hello to Google",
  "permissions": ["tabs", "*://*.google.com/*"],
  "content_scripts": [
    {
      "matches": ["*://*.google.com/*"],
      "js": ["hello.js"]
    }
  ]
}

确保您将Hello.html重命名为hello.js（并删除<script>代码。）

另请注意，我已将您的http://*.google.com/更改为*://*.google.com/*，以便它将通过HTTP和HTTPS应用于Google（并且结尾*可确保它将应用于google.com上的所有网页{1}}，而不仅仅是主页。）

Answer 2

我遇到了这个答案，试图找到一种方法只启用某些页面上的图标，这就是我所做的。 Docs

背景.js

chrome.runtime.onInstalled.addListener(function() {
  chrome.tabs.onActivated.addListener(async info => {
    const tab = await chrome.tabs.get(info.tabId);
    
    const isGithub = tab.url.startsWith('https://github.com/');
    isGithub 
      ? chrome.action.enable(tab.tabId) 
      : chrome.action.disable(tab.tabId);
  });
});

确保在清单中添加 tabs 权限

Answer 3

First of all there are 2 types of extensions:

1. Browser Action - which work for multiple websites or almost all websites
2. Page Action - which work for specific websites or webpages [which is needed 
   in our case]

Follow these steps to show your extension only on google:

Step 1: Go to manifest.json file and add the below code snippet

        "background":{
           "scripts":["background.js"],
           "persistent":false
         }
         
         ***also make sure you have page action not browser action** 
        
         "page_action" : { "default_popup":"your_popup.html" }

Step 2: Now add permissions in manifest:
        
        "permissions":["declarativeContent"]

Step 3: Now create background.js in root folder of extension and add the 
        below code in it, this will let the extension to work only on 
        urls that contain google.com
        
        // When the extension is installed or upgraded ...
        chrome.runtime.onInstalled.addListener(function() {
         // Replace all rules ...
         chrome.declarativeContent.onPageChanged.removeRules(undefined, 
      function() {
         // With a new rule ...
         chrome.declarativeContent.onPageChanged.addRules([
         {
          // That fires when a page's URL contains a 'g' ...
          conditions: [
          new chrome.declarativeContent.PageStateMatcher({
            pageUrl: { urlContains: 'google.com' },
          })
         ],
          // And shows the extension's page action.
          actions: [ new chrome.declarativeContent.ShowPageAction() ]
        }
      ]);
    });
  });

Step 4: Now reload your extension, you'll find that your extension will work 
        only for google.com

Hope this solved your query, If Yes, then Upvote the answer Thanks!

Chrome扩展程序针对特定页面运行

3 个答案: