Very simple js console switcher.

core/js/js.js

+/**
+ * Disable console output unless DEBUG mode is enabled.
+ * Add 
+ *     define('DEBUG', true);
+ * To the end of config/config.php to enable debug mode.
+ */
+if (oc_debug !== true) {
+	if (!window.console) {
+		window.console = {};
+	}
+	var methods = ['log', 'debug', 'warn', 'info', 'error', 'assert'];
+	for (var i = 0; i < methods.length; i++) {
+	console[methods[i]] = function () { };
+	}
+}
+
 /**
  * translate a string
  * @param app the id of the app for which to translate the string

core/templates/layout.base.php

@@ -8,6 +8,7 @@
 			<link rel="stylesheet" href="<?php echo $cssfile; ?>" type="text/css" media="screen" />
 		<?php endforeach; ?>
 		<script type="text/javascript">
+			var oc_debug = <?php echo (defined('DEBUG') && DEBUG) ? 'true' : 'false'; ?>;
 			var oc_webroot = '<?php echo OC::$WEBROOT; ?>';
 			var oc_appswebroots = <?php echo $_['apps_paths'] ?>;
 			var oc_requesttoken = '<?php echo $_['requesttoken']; ?>';

core/templates/layout.guest.php

@@ -8,6 +8,7 @@
 			<link rel="stylesheet" href="<?php echo $cssfile; ?>" type="text/css" media="screen" />
 		<?php endforeach; ?>
 		<script type="text/javascript">
+			var oc_debug = <?php echo (defined('DEBUG') && DEBUG) ? 'true' : 'false'; ?>;
 			var oc_webroot = '<?php echo OC::$WEBROOT; ?>';
 			var oc_appswebroots = <?php echo $_['apps_paths'] ?>;
 			var oc_requesttoken = '<?php echo $_['requesttoken']; ?>';

core/templates/layout.user.php

@@ -8,6 +8,7 @@
 			<link rel="stylesheet" href="<?php echo $cssfile; ?>" type="text/css" media="screen" />
 		<?php endforeach; ?>
 		<script type="text/javascript">
+			var oc_debug = <?php echo (defined('DEBUG') && DEBUG) ? 'true' : 'false'; ?>;
 			var oc_webroot = '<?php echo OC::$WEBROOT; ?>';
 			var oc_appswebroots = <?php echo $_['apps_paths'] ?>;
 			var oc_current_user = '<?php echo OC_User::getUser() ?>';