Question

Chrome 扩展程序导致“未捕获（承诺中）错误：无法访问 chrome:// URL”

2021-06-07

19237

google-chrome google-chrome-extension chrome-extension-manifest-v3

我正在按照 chrome 官方网站上发布的如何开始使用 chrome 扩展程序 https://developer.chrome.com/docs/extensions/mv3/getstarted/

我复制并粘贴了所有代码并以相同的方式运行。但就我而言，当我运行 chrome.scripting.executeScript 时，它会导致 “未捕获（在承诺中）错误：无法访问 chrome:// URL” 错误。

我不知道问题是什么。这是我从上面的链接复制的代码。

manifest.json

{
  "name": "Getting Started Example",
  "description": "Build an Extension!",
  "version": "1.0",
  "manifest_version": 3,
  "background": {
    "service_worker": "background.js"
  },
  "permissions": ["storage", "activeTab", "scripting"],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/images/get_started16.png",
      "32": "/images/get_started32.png",
      "48": "/images/get_started48.png",
      "128": "/images/get_started128.png"
    }
  },
  "icons": {
    "16": "/images/get_started16.png",
    "32": "/images/get_started32.png",
    "48": "/images/get_started48.png",
    "128": "/images/get_started128.png"
  }
}

background.js

let color = '#3aa757';

chrome.runtime.onInstalled.addListener(() => {
  chrome.storage.sync.set({ color });
  console.log(`default color: ${color}`);
});

popoup.js

// Initialize button with user's preferred color
let changeColor = document.getElementById('changeColor');

chrome.storage.sync.get('color', ({ color }) => {
  changeColor.style.backgroundColor = color;
});

// When the button is clicked, inject setPageBackgroundColor into current page
changeColor.addEventListener('click', async () => {
  console.log('clicked');
  console.log(chrome.tabs);

  let [tab] = await chrome.tabs.query({ active: true, currentWindow: true });
  console.log(tab);

  chrome.scripting.executeScript({
    target: { tabId: tab.id },
    function: setPageBackgroundColor,
  });
});

// The body of this function will be executed as a content script inside the
// current page
function setPageBackgroundColor() {
  chrome.storage.sync.get('color', ({ color }) => {
    document.body.style.backgroundColor = color;
  });
}

popup.html

<!DOCTYPE html>
<html>
  <head>
    <link rel="stylesheet" href="button.css" />
  </head>
  <body>
    <button id="changeColor"></button>
    <script src="popup.js"></script>
  </body>
</html>

您有什么想法吗？

Answer 1

当您尝试触发该事件时，请确保您不在 chrome://extensions/ 或类似位置。

VJPPaz

2021-08-09

Answer 2

您可以检查 URL 并避免为“chrome://”注入脚本：

// skip urls like "chrome://" to avoid extension error
if (tab.url?.startsWith("chrome://")) return undefined;

chrome.scripting.executeScript({
   //...

我也在 background.js 中执行此操作，因为我在那里注入了脚本：

chrome.tabs.onUpdated.addListener((tabId, changeInfo, tab) => {

  // skip urls like "chrome://" to avoid extension error
  if (tab.url?.startsWith("chrome://")) return undefined;

  if (tab.active && changeInfo.status === "complete") {
    chrome.scripting.executeScript({
       //...

注意。要访问 tab.url ，您需要清单 (V3)“权限”中的“tabs”。