From 96c65aaebbf9670cc4b41977ac3ea772f8f4f5e6 Mon Sep 17 00:00:00 2001
From: Jordan Eldredge <jordan@jordaneldredge.com>
Date: Sat, 16 Mar 2019 23:30:25 -0700
Subject: [PATCH] Improve typing of onTrackDidChange

---
 demo/js/mediaSession.ts |  2 +-
 index.d.ts              | 12 +++++++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/demo/js/mediaSession.ts b/demo/js/mediaSession.ts
index 1ca84c32..1f3b4c46 100644
--- a/demo/js/mediaSession.ts
+++ b/demo/js/mediaSession.ts
@@ -4,7 +4,7 @@ import { LoadedURLTrack } from "../../js/types";
 export default function enableMediaSession(webamp: WebampLazy) {
   if ("mediaSession" in navigator) {
     /* global MediaMetadata */
-    webamp.onTrackDidChange((track: LoadedURLTrack | null) => {
+    webamp.onTrackDidChange(track => {
       if (track == null) {
         return;
       }
diff --git a/index.d.ts b/index.d.ts
index 15252031..139edb27 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -45,6 +45,16 @@ interface BlobTrack extends TrackInfo {
   blob: Blob;
 }
 
+interface LoadedURLTrack {
+  url: string;
+  metaData: {
+    artist: string | null;
+    title: string | null;
+    album: string | null;
+    albumArtUrl: string | null;
+  };
+}
+
 /**
  * Many methods on the webamp instance deal with track.
  *
@@ -190,7 +200,7 @@ export default class Webamp {
    * @returns An "unsubscribe" function. Useful if at some point in the future you want to stop listening to these events.
    */
   public onTrackDidChange(
-    cb: (trackInfo: { url: string } | null) => void
+    cb: (trackInfo: LoadedURLTrack | null) => void
   ): () => void;
 
   /**