Minor code style improvements (mostly whitespace)

static/main.js

@@ -81,7 +81,6 @@ function addKeyListeners() {
 		}
 	};
 
-
 	// keyboard listener for playing sounds using enter key
 	var buttons = document.querySelectorAll(".sound");
 
@@ -91,7 +90,7 @@ function addKeyListeners() {
 			var source = e.target;
 			// keylistener for enter or ctrl+enter (which is k10 on chrome)
 			if (key === 13 || (key === 10 && e.ctrlKey)) {
-				if(e.ctrlKey){
+				if (e.ctrlKey){
 					killAllAudio();
 					await sleep(100);
 				}
@@ -135,11 +134,11 @@ function hideSections() {
 
 function ajaxRequest(url) {
 	var ajaxRequest;
-	try{
+	try {
 		ajaxRequest = new XMLHttpRequest();
 		ajaxRequest.open("GET", url, true);
 		ajaxRequest.send(null);
-	}catch (e){
+	} catch (e) {
 		alert("Unfortunately we were unable to handle your request. Please try again later and contact the server administrator if the problem persists.");
 		return false;
 	}
@@ -151,12 +150,12 @@ function ajaxRequest(url) {
 */
 function toggleLocalMode() {
 	toggleButton = document.getElementById("local-mode-button").children[0];
-	if(localModeEnabled){
+	if (localModeEnabled) {
 		localModeEnabled = false;
 		toggleButton.classList.remove("local");
 		toggleButton.innerHTML = "[S]";
 		toggleButton.title = "play sounds on server";
-	}else{
+	} else {
 		localModeEnabled = true;
 		toggleButton.classList.add("local");
 		toggleButton.innerHTML = "[L]";
@@ -168,20 +167,20 @@ function toggleLocalMode() {
 * Either plays the given sound file locally by using howler.js or forwards the request to the remote server using AJAX.
 */
 function playSound(filename) {
-	if(localModeEnabled){
+	if (localModeEnabled){
 		// play local audio using howler.js
 		var sound = new Howl({
-			src: ['/sounds/'+filename]
+			src: ['/sounds/' + filename]
 		});
 		sound.play();
 		howlerSounds.push(sound);
-	}else{
-		ajaxRequest("/play/"+filename);
+	} else {
+		ajaxRequest("/play/" + filename);
 	}
 }
 
 function killAllHowlerAudio() {
-	for(i=0; i<howlerSounds.length; i++) {
+	for (var i = 0; i < howlerSounds.length; i++) {
 		howlerSounds[i].stop();
 	}
 }