Chrome 擴充功能更新後如何刪除孤立腳本？

<code class="javascript">// Re-inject content scripts on reloading/installing the extension
// (See example in link provided in QA)</code>

<code class="javascript">// Generate a unique message ID for the orphan check
const orphanMessageId = chrome.runtime.id + 'orphanCheck';

// Register a listener for the orphan check message
window.addEventListener(orphanMessageId, unregisterOrphan);

// ... (Continue with original content script code) ...

// Function to unregister the orphaned script
function unregisterOrphan() {
  // Check if the extension is uninstalled
  if (!chrome.runtime.id) {
    // The script is not orphaned
    return;
  }
  
  // Remove the orphan message listener
  window.removeEventListener(orphanMessageId, unregisterOrphan);

  // Remove DOM event listeners
  document.removeEventListener('mousemove', onMouseMove);

  // Remove runtime message listener (try-catch required in some cases)
  try {
    chrome.runtime.onMessage.removeListener(onMessage);
  } catch (e) {}
}</code>

<code class="javascript">// Function to send a message and ensure a content script is injected before doing so
async function sendMessage(data) {
  const [tab] = await chrome.tabs.query({ active: true, currentWindow: true });
  if (await ensureContentScript(tab.id)) {
    return await chrome.tabs.sendMessage(tab.id, data);
  }
}

// Function to check if a content script is running and re-inject it if not
async function ensureContentScript(tabId) {
  try {
    // Check if the content script is running
    const [{ result }] = await chrome.scripting.executeScript({
      target: { tabId },
      func: () => window.running === true,
    });
    
    // If not, inject the content script
    if (!result) {
      await chrome.scripting.executeScript({
        target: { tabId },
        files: ['content.js'],
      });
    }
    
    return true;
  } catch (e) {}
}</code>