Fixes #6 by implementing link unfurling

packages/plugos/environments/node_worker.ts

@@ -39,6 +39,7 @@ let vm = new VM({
     clearTimeout,
     setInterval,
     URL,
+    window: {},
     clearInterval,
     fetch: require(`${nodeModulesPath}/node-fetch`),
     WebSocket: require(`${nodeModulesPath}/ws`),

packages/plugos/environments/sandbox_worker.ts

@@ -11,8 +11,16 @@ let pendingRequests = new Map<
   }
 >();
 
+let isWorker = false;
+
+if (typeof window === "undefined") {
+  // @ts-ignore
+  window = {};
+  isWorker = true;
+}
+
 function workerPostMessage(msg: ControllerMessage) {
-  if (typeof window !== "undefined" && window.parent !== window) {
+  if (!isWorker && window.parent !== window) {
     window.parent.postMessage(msg, "*");
   } else {
     self.postMessage(msg);