Add files via upload

Author: thiagogq

js/background.js

@@ -0,0 +1,27 @@
+let creating;
+const setupOffscreenDocument = async function(path) {
+  if (await chrome.offscreen.hasDocument?.()) return;
+
+  if (creating) {
+    await creating;
+  } else {
+    creating = chrome.offscreen.createDocument({
+      url: chrome.runtime.getURL(path),
+      reasons: [
+        chrome.offscreen.Reason.WORKERS, 
+        chrome.offscreen.Reason.LOCAL_STORAGE
+      ],
+      justification: "So that the SQLite tables are created before the first display, allowing the page to load faster.",
+    });
+    await creating;
+    creating = null;
+  }
+}
+
+setupOffscreenDocument("index.html");
+
+chrome.action.onClicked.addListener((_) => {
+  chrome.tabs.create({
+    url: "index.html"
+  });
+});