diff --git a/js/node_helper.js b/js/node_helper.js
index 45bd03dd..86ad3aa4 100644
--- a/js/node_helper.js
+++ b/js/node_helper.js
@@ -122,6 +122,13 @@ NodeHelper.checkFetchStatus = function (response) {
 	}
 };
 
+/**
+ * Look at the specified error and return an appropriate error type, that
+ * can be translated to a detailed error message
+ *
+ * @param {Error} error the error from fetching something
+ * @returns {string} the string of the detailed error message in the translations
+ */
 NodeHelper.checkFetchError = function (error) {
 	let error_type = "MODULE_ERROR_UNSPECIFIED";
 	if (error.code === "EAI_AGAIN") {
diff --git a/modules/default/alert/notificationFx.js b/modules/default/alert/notificationFx.js
index 0aa2a5c3..317fa75a 100644
--- a/modules/default/alert/notificationFx.js
+++ b/modules/default/alert/notificationFx.js
@@ -123,7 +123,7 @@
 	/**
 	 * Dismiss the notification
 	 *
-	 * @param close
+	 * @param {boolean} [close] call the onClose callback at the end
 	 */
 	NotificationFx.prototype.dismiss = function (close = true) {
 		this.active = false;
diff --git a/modules/default/calendar/calendarutils.js b/modules/default/calendar/calendarutils.js
index 223dfb26..7f0b14b8 100644
--- a/modules/default/calendar/calendarutils.js
+++ b/modules/default/calendar/calendarutils.js
@@ -18,8 +18,8 @@ const CalendarUtils = {
 	 * Calculate the time correction, either dst/std or full day in cases where
 	 * utc time is day before plus offset
 	 *
-	 * @param {object} event
-	 * @param {Date} date
+	 * @param {object} event the event which needs adjustement
+	 * @param {Date} date the date on which this event happens
 	 * @returns {number} the necessary adjustment in hours
 	 */
 	calculateTimezoneAdjustment: function (event, date) {
@@ -117,6 +117,13 @@ const CalendarUtils = {
 		return adjustHours;
 	},
 
+	/**
+	 * Filter the events from ical according to the given config
+	 *
+	 * @param {object} data the calendar data from ical
+	 * @param {object} config The configuration object
+	 * @returns {string[]} the filtered events
+	 */
 	filterEvents: function (data, config) {
 		const newEvents = [];
 
@@ -500,8 +507,8 @@ const CalendarUtils = {
 	/**
 	 * Lookup iana tz from windows
 	 *
-	 * @param msTZName
-	 * @returns {*|null}
+	 * @param {string} msTZName the timezone name to lookup
+	 * @returns {string|null} the iana name or null of none is found
 	 */
 	getIanaTZFromMS: function (msTZName) {
 		// Get hash entry
@@ -571,12 +578,13 @@ const CalendarUtils = {
 	},
 
 	/**
+	 * Determines if the user defined title filter should apply
 	 *
-	 * @param title
-	 * @param filter
-	 * @param useRegex
-	 * @param regexFlags
-	 * @returns {boolean|*}
+	 * @param {string} title the title of the event
+	 * @param {string} filter the string to look for, can be a regex also
+	 * @param {boolean} useRegex true if a regex should be used, otherwise it just looks for the filter as a string
+	 * @param {string} regexFlags flags that should be applied to the regex
+	 * @returns {boolean} True if the title should be filtered out, false otherwise
 	 */
 	titleFilterApplies: function (title, filter, useRegex, regexFlags) {
 		if (useRegex) {
diff --git a/modules/default/compliments/compliments.js b/modules/default/compliments/compliments.js
index fc90527f..054a409f 100644
--- a/modules/default/compliments/compliments.js
+++ b/modules/default/compliments/compliments.js
@@ -55,7 +55,7 @@ Module.register("compliments", {
 	/**
 	 * Generate a random index for a list of compliments.
 	 *
-	 * @param  {string[]} compliments Array with compliments.
+	 * @param {string[]} compliments Array with compliments.
 	 * @returns {number} a random index of given array
 	 */
 	randomIndex: function (compliments) {
diff --git a/modules/default/newsfeed/node_helper.js b/modules/default/newsfeed/node_helper.js
index 55f403db..32656a9f 100644
--- a/modules/default/newsfeed/node_helper.js
+++ b/modules/default/newsfeed/node_helper.js
@@ -27,8 +27,8 @@ module.exports = NodeHelper.create({
 	 * Creates a fetcher for a new feed if it doesn't exist yet.
 	 * Otherwise it reuses the existing one.
 	 *
-	 * @param {object} feed The feed object.
-	 * @param {object} config The configuration object.
+	 * @param {object} feed The feed object
+	 * @param {object} config The configuration object
 	 */
 	createFetcher: function (feed, config) {
 		const url = feed.url || "";