diff --git a/.js/github.com.js b/.js/github.com.js
index 94cead7..9e7f1c5 100644
--- a/.js/github.com.js
+++ b/.js/github.com.js
@@ -5,68 +5,74 @@ let repoUrl = $("div.repohead-details-container > h1.public > strong[itemprop=na
 // $("body").css("font-family", $("body").css("font-family").replace("BlinkMacSystemFont,", ""));
 
 // releases tab
-let repoNav = $("nav.reponav");
-if (repoNav.length > 0) {
-	let releasesUrl = repoUrl + "/releases";
-	let releasesTab = $("<a></a>");
-	releasesTab.attr("href", releasesUrl);
-	releasesTab.attr("data-selected-links", releasesUrl);
-	releasesTab.addClass("js-selected-navigation-item reponav-item");
+(function() {
+	let repoNav = $("nav.reponav");
+	if (repoNav.length > 0) {
+		let releasesUrl = repoUrl + "/releases";
+		let releasesTab = $("<a></a>");
+		releasesTab.attr("href", releasesUrl);
+		releasesTab.attr("data-selected-links", releasesUrl);
+		releasesTab.addClass("js-selected-navigation-item reponav-item");
 
-	let icon = $("<svg aria-hidden=\"true\" class=\"octicon octicon-tag\" height=\"16\" version=\"1.1\" viewBox=\"0 0 14 16\" width=\"14\"><path d=\"M7.73 1.73C7.26 1.26 6.62 1 5.96 1H3.5C2.13 1 1 2.13 1 3.5v2.47c0 .66.27 1.3.73 1.77l6.06 6.06c.39.39 1.02.39 1.41 0l4.59-4.59a.996.996 0 0 0 0-1.41L7.73 1.73zM2.38 7.09c-.31-.3-.47-.7-.47-1.13V3.5c0-.88.72-1.59 1.59-1.59h2.47c.42 0 .83.16 1.13.47l6.14 6.13-4.73 4.73-6.13-6.15zM3.01 3h2v2H3V3h.01z\"></path></svg>");
-	releasesTab.append(icon);
+		let icon = $("<svg aria-hidden=\"true\" class=\"octicon octicon-tag\" height=\"16\" version=\"1.1\" viewBox=\"0 0 14 16\" width=\"14\"><path d=\"M7.73 1.73C7.26 1.26 6.62 1 5.96 1H3.5C2.13 1 1 2.13 1 3.5v2.47c0 .66.27 1.3.73 1.77l6.06 6.06c.39.39 1.02.39 1.41 0l4.59-4.59a.996.996 0 0 0 0-1.41L7.73 1.73zM2.38 7.09c-.31-.3-.47-.7-.47-1.13V3.5c0-.88.72-1.59 1.59-1.59h2.47c.42 0 .83.16 1.13.47l6.14 6.13-4.73 4.73-6.13-6.15zM3.01 3h2v2H3V3h.01z\"></path></svg>");
+		releasesTab.append(icon);
 
-	releasesTab.append("      Releases");
+		releasesTab.append("      Releases");
 
-	let counter = $("<span></span>");
-	counter.text("0");
-	counter.addClass("counter");
-	releasesTab.append(counter);
+		let counter = $("<span></span>");
+		counter.text("0");
+		counter.addClass("counter");
+		releasesTab.append(counter);
 
-	repoNav.append(releasesTab);
+		repoNav.append(releasesTab);
 
-	$.ajax({
-		url: "https://api.github.com/repos" + repoUrl + "/releases",
-		dataType: "text",
-		success: (data) => {
-			let json = JSON.parse(data);
-			counter.text(json.length);
+		$.ajax({
+			url: "https://api.github.com/repos" + repoUrl + "/releases",
+			dataType: "text",
+			success: (data) => {
+				let json = JSON.parse(data);
+				counter.text(json.length);
+			}
+		});
+
+		if (location.pathname.endsWith("/releases")) {
+			$("nav.reponav > span:first > a").removeClass("selected");
+			releasesTab.addClass("selected");
 		}
-	});
-
-	if (location.pathname.endsWith("/releases")) {
-		$("nav.reponav > span:first > a").removeClass("selected");
-		releasesTab.addClass("selected");
 	}
-}
+})();
 
 // add explore link to menu
-if (!location.hostname.startsWith("gist")) {
-	let lastItem = $(".header-nav[role=navigation] > .header-nav-item:last");
+(function() {
+	if (!location.hostname.startsWith("gist")) {
+		let lastItem = $(".header-nav[role=navigation] > .header-nav-item:last");
 
-	if (lastItem.find("a.header-nav-link").text() != "Explore") {
-		let exploreItem = $("<li></li>");
-		exploreItem.addClass("header-nav-item");
-		let exploreLink = $("<a></a>");
-		exploreLink.addClass("header-nav-link");
-		exploreLink.attr("href", "/explore");
-		exploreLink.text("Explore");
-		exploreItem.append(exploreLink);
-		lastItem.before(exploreItem);
+		if (lastItem.find("a.header-nav-link").text() != "Explore") {
+			let exploreItem = $("<li></li>");
+			exploreItem.addClass("header-nav-item");
+			let exploreLink = $("<a></a>");
+			exploreLink.addClass("header-nav-link");
+			exploreLink.attr("href", "/explore");
+			exploreLink.text("Explore");
+			exploreItem.append(exploreLink);
+			lastItem.before(exploreItem);
+		}
 	}
-}
+})();
 
 // linkify branch references in PRs
-$("span.commit-ref").each((i, el) => {
-	el = $(el);
-	let bits = el.attr("title").split(":");
-	let repo = bits[0];
-	let branch = bits[1];
-	let link = $("<a></a>");
-	link.attr("href", `https://github.com/${repo}/tree/${branch}`);
-	el.wrap(link);
-});
-$("body").after("<style>span.commit-ref:hover, span.commit-ref:hover span { text-decoration: underline; }</style>");
+(function() {
+	$("span.commit-ref").each((i, el) => {
+		el = $(el);
+		let bits = el.attr("title").split(":");
+		let repo = bits[0];
+		let branch = bits[1];
+		let link = $("<a></a>");
+		link.attr("href", `https://github.com/${repo}/tree/${branch}`);
+		el.wrap(link);
+	});
+	$("body").after("<style>span.commit-ref:hover, span.commit-ref:hover span { text-decoration: underline; }</style>");
+})();
 
 // linkify issue/pr references in issue titles
 (function() {