import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

addon-sdk/source/examples/toolbar-api/lib/main.js

@@ -0,0 +1,48 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const { Toolbar } = require("sdk/ui/toolbar");
+const { Frame } = require("sdk/ui/frame");
+const { ActionButton } = require("sdk/ui/button/action");
+
+var button = new ActionButton({
+  id: "button",
+  label: "send!",
+  icon: "./favicon.ico",
+  onClick: () => {
+    frame.postMessage({
+      hello: "content"
+    });
+  }
+});
+
+var frame = new Frame({
+    url: "./index.html",
+    onAttach: () => {
+      console.log("frame was attached");
+    },
+    onReady: () => {
+      console.log("frame document was loaded");
+    },
+    onLoad: () => {
+      console.log("frame load complete");
+    },
+    onMessage: (event) => {
+      console.log("got message from frame content", event);
+      if (event.data === "ping!")
+        event.source.postMessage("pong!", event.source.origin);
+    }
+});
+var toolbar = new Toolbar({
+  items: [frame],
+  title: "Addon Demo",
+  hidden: false,
+  onShow: () => {
+    console.log("toolbar was shown");
+  },
+  onHide: () => {
+    console.log("toolbar was hidden");
+  }
+});