updated

windows_print_service/chrome_extension/content.js

@@ -1,28 +1,48 @@
 /**
  * Quality Label Printing Service - Content Script
- * Injects print service functionality into web pages
+ * Simplified injection for extension ID detection
  */
 
+console.log('Quality Label Printing - Content Script Loaded');
 
-// Inject extension ID into the page as a hidden DOM element for detection
+// Inject extension ID into DOM for web page detection
 function injectExtensionId() {
-    try {
-        const existing = document.getElementById('chrome-extension-id');
-        if (existing) return; // Already injected
-        const el = document.createElement('div');
-        el.id = 'chrome-extension-id';
-        el.setAttribute('data-extension-id', chrome.runtime.id);
-        el.style.display = 'none';
-        document.documentElement.appendChild(el);
-        // Optionally, also set a global variable
-        window.CHROME_EXTENSION_ID = chrome.runtime.id;
-        console.log('Injected extension ID:', chrome.runtime.id);
-    } catch (e) {
-        console.warn('Failed to inject extension ID:', e);
+    // Remove any existing extension ID element
+    const existingElement = document.getElementById('chrome-extension-id');
+    if (existingElement) {
+        existingElement.remove();
     }
+    
+    // Create new element with extension ID
+    const extensionIdElement = document.createElement('div');
+    extensionIdElement.id = 'chrome-extension-id';
+    extensionIdElement.setAttribute('data-extension-id', chrome.runtime.id);
+    extensionIdElement.style.display = 'none';
+    
+    // Add to document head or body
+    (document.head || document.body || document.documentElement).appendChild(extensionIdElement);
+    
+    console.log('Extension ID injected:', chrome.runtime.id);
 }
-injectExtensionId();
 
-console.log('Quality Label Printing Service: Content script loaded');
+// Inject extension ID when DOM is ready
+if (document.readyState === 'loading') {
+    document.addEventListener('DOMContentLoaded', injectExtensionId);
+} else {
+    injectExtensionId();
+}
 
-// Remove all script injection and messaging. Only inject the extension ID for CSP compatibility.
+// Also inject when page changes (for SPAs)
+if (window.navigation) {
+    navigation.addEventListener('navigate', injectExtensionId);
+} else {
+    // Fallback for older browsers
+    let lastUrl = location.href;
+    new MutationObserver(() => {
+        const url = location.href;
+        if (url !== lastUrl) {
+            lastUrl = url;
+            setTimeout(injectExtensionId, 100);
+        }
+    }).observe(document, { subtree: true, childList: true });
+}