Move `with_player` to a new module

Move this function to a new module as I'd like to use it for checking
the "Watch Credits" button.

Also change from a callback to a `Promise`. Need to include the
`Promise` lib via ES2015 in tsconfig to be able to build with promises.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/player.ts b/src/player.ts
new file mode 100644
index 0000000..ea0e541
--- /dev/null
+++ b/src/player.ts
@@ -0,0 +1,16 @@
+export default function with_player (): Promise<HTMLElement> {
+	return new Promise(function(resolve) {
+		const interval = setInterval(
+			function() {
+				const player = document.querySelector('.NFPlayer.nf-player-container');
+
+				if (player) {
+					clearInterval(interval);
+
+					resolve(player);
+				}
+			},
+			1000
+		);
+	});
+}