docs: update README with future plans

src/libs/msg.js

@@ -0,0 +1,38 @@
+import { browser } from "./browser";
+
+/**
+ * 获取当前tab信息
+ * @returns
+ */
+export const getCurTab = async () => {
+  const [tab] = await browser.tabs.query({
+    active: true,
+    lastFocusedWindow: true,
+  });
+  return tab;
+};
+
+export const getCurTabId = async () => {
+  const tab = await getCurTab();
+  return tab.id;
+};
+
+/**
+ * 发送消息给background
+ * @param {*} action
+ * @param {*} args
+ * @returns
+ */
+export const sendBgMsg = (action, args) =>
+  browser.runtime.sendMessage({ action, args });
+
+/**
+ * 发送消息给当前页面
+ * @param {*} action
+ * @param {*} args
+ * @returns
+ */
+export const sendTabMsg = async (action, args) => {
+  const tabId = await getCurTabId();
+  return browser.tabs.sendMessage(tabId, { action, args });
+};