basic search implementation

globals.d.ts

@@ -0,0 +1,10 @@
+export declare global {
+  interface Document {
+    addEventListener<K extends keyof CustomEventMap>(type: K,
+      listener: (this: Document, ev: CustomEventMap[K]) => void): void;
+    dispatchEvent<K extends keyof CustomEventMap>(ev: CustomEventMap[K]): void;
+  }
+  interface Window {
+    spaNavigate(url: URL, isBack: boolean = false)
+  }
+}