diff --git a/src/ts/browser-action.ts b/src/ts/browser-action.ts
index 7a6bb6d..09e1ad8 100644
--- a/src/ts/browser-action.ts
+++ b/src/ts/browser-action.ts
@@ -9,10 +9,15 @@ const MAIN_TEMPLATE: twig.Template = twig.twig({href: MAIN_TEMPLATE_URI, async:
 document.addEventListener("DOMContentLoaded", () => {
 	tabs.getWindows((windows: chrome.windows.Window[]) => {
 		document.querySelector("body").innerHTML = String(MAIN_TEMPLATE.render({windows}));
-		registerTabClickListeners();
+		registerTabClickListeners;
 	});
 });
 
+/**
+ * registerTabClickListeners registers click listeners to switch tabs.
+ *
+ * @returns {void}
+ */
 function registerTabClickListeners(): void {
 	let tabElements = document.getElementsByClassName("tab");
 	[].forEach.call(tabElements, (element) => {