diff --git a/eslint.config.mjs b/eslint.config.mjs
index 33e2a550..a22a0dc6 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -3,6 +3,7 @@ import globals from "globals";
 import {flatConfigs as importX} from "eslint-plugin-import-x";
 import jest from "eslint-plugin-jest";
 import js from "@eslint/js";
+import jsdoc from "eslint-plugin-jsdoc";
 import packageJson from "eslint-plugin-package-json";
 import stylistic from "@stylistic/eslint-plugin";
 
@@ -22,8 +23,8 @@ export default defineConfig([
 				moment: "readonly"
 			}
 		},
-		plugins: {js, stylistic},
-		extends: [importX.recommended, jest.configs["flat/recommended"], "js/recommended", "stylistic/all"],
+		plugins: {js, jsdoc, stylistic},
+		extends: [importX.recommended, jest.configs["flat/recommended"], "js/recommended", jsdoc.configs["flat/recommended"], "stylistic/all"],
 		rules: {
 			"@stylistic/array-element-newline": ["error", "consistent"],
 			"@stylistic/arrow-parens": ["error", "always"],
diff --git a/js/check_config.js b/js/check_config.js
index d159d9f4..50cf4f44 100644
--- a/js/check_config.js
+++ b/js/check_config.js
@@ -72,6 +72,10 @@ function checkConfigFile () {
 	}
 }
 
+/**
+ *
+ * @param {string} configFileName - The path and filename of the configuration file to validate.
+ */
 function validateModulePositions (configFileName) {
 	Log.info("Checking modules structure configuration ...");
 
diff --git a/modules/default/calendar/calendarfetcherutils.js b/modules/default/calendar/calendarfetcherutils.js
index df567af4..e5f5ce2e 100644
--- a/modules/default/calendar/calendarfetcherutils.js
+++ b/modules/default/calendar/calendarfetcherutils.js
@@ -502,10 +502,10 @@ const CalendarFetcherUtils = {
 	},
 
 	/**
-	 * fixup thew event fields that have dates to use local time
-	 * BEFORE calling rrule.between
-	 * @param the event being processed
-	 * @returns nothing
+	 * Fixes the event fields that have dates to use local time
+	 * before calling rrule.between.
+	 * @param {object} event - The event being processed.
+	 * @returns {void}
 	 */
 	fixEventtoLocal (event) {
 		// if there are excluded dates, their date is incorrect and possibly key as well.
@@ -542,9 +542,9 @@ const CalendarFetcherUtils = {
 	/**
 	 * convert a UTC date to local time
 	 * BEFORE calling rrule.between
-	 * @param date ti conert
-	 * 				tz event is currently in
-	 * @returns updated date object
+	 * @param {Date} date The date to convert
+	 * @param {string} tz The timezone string to convert the date to.
+	 * @returns {Date} updated date object
 	 */
 	convertDateToLocalTime (date, tz) {
 		let delta_tz_offset = 0;
@@ -585,8 +585,8 @@ const CalendarFetcherUtils = {
 	/**
 	 * get the exdate/recurrence hash key from the date object
 	 * BEFORE calling rrule.between
-	 * @param the date of the event
-	 * @returns string date key YYYY-MM-DD
+	 * @param {Date} date The date of the event
+	 * @returns {string} date key in the format YYYY-MM-DD
 	 */
 	getDateKeyFromDate (date) {
 		// get our runtime timezone offset
@@ -611,9 +611,8 @@ const CalendarFetcherUtils = {
 
 	/**
 	 * get the timezone offset from the timezone string
-	 *
-	 * @param the timezone string
-	 * @returns the numerical offset
+	 * @param {string} timeZone The timezone string
+	 * @returns {number} The numerical offset in minutes from UTC.
 	 */
 	getTimezoneOffsetFromTimezone (timeZone) {
 		const str = new Date().toLocaleString("en", { timeZone, timeZoneName: "longOffset" });
@@ -624,10 +623,10 @@ const CalendarFetcherUtils = {
 
 	/**
 	 * fixup the date start moment after rrule.between returns date array
-	 *
-	 * @param date object from rrule.between results
+	 * @param {Date} date object from rrule.between results
 	 *  			the event object it came from
-	 * @returns moment object
+	 * @param {object} event - The event object it came from.
+	 * @returns {Moment} moment object
 	 */
 	getAdjustedStartMoment (date, event) {
 
diff --git a/modules/default/newsfeed/newsfeed.js b/modules/default/newsfeed/newsfeed.js
index 2907439d..1e8cadfe 100644
--- a/modules/default/newsfeed/newsfeed.js
+++ b/modules/default/newsfeed/newsfeed.js
@@ -181,6 +181,7 @@ Module.register("newsfeed", {
 	 * Gets a feed property by name
 	 * @param {object} feed A feed object.
 	 * @param {string} property The name of the property.
+	 * @returns {*} The value of the specified property for the feed.
 	 */
 	getFeedProperty (feed, property) {
 		let res = this.config[property];
diff --git a/modules/default/utils.js b/modules/default/utils.js
index 12d9b36a..2d6e43ab 100644
--- a/modules/default/utils.js
+++ b/modules/default/utils.js
@@ -5,7 +5,7 @@
  * @param {boolean} useCorsProxy A flag to indicate
  * @param {Array.<{name: string, value:string}>} requestHeaders the HTTP headers to send
  * @param {Array.<string>} expectedResponseHeaders the expected HTTP headers to receive
- * @param {string} basePath, default /
+ * @param {string} basePath The base path, default is "/"
  * @returns {Promise} resolved when the fetch is done. The response headers is placed in a headers-property (provided the response does not already contain a headers-property).
  */
 async function performWebRequest (url, type = "json", useCorsProxy = false, requestHeaders = undefined, expectedResponseHeaders = undefined, basePath = "/") {
@@ -38,7 +38,7 @@ async function performWebRequest (url, type = "json", useCorsProxy = false, requ
  * @param {string} url the url to fetch from
  * @param {Array.<{name: string, value:string}>} requestHeaders the HTTP headers to send
  * @param {Array.<string>} expectedResponseHeaders the expected HTTP headers to receive
- * @param {string} basePath, default /
+ * @param {string} basePath The base path, default is "/"
  * @returns {string} to be used as URL when calling CORS-method on server.
  */
 const getCorsUrl = function (url, requestHeaders, expectedResponseHeaders, basePath = "/") {
diff --git a/tests/electron/modules/compliments_spec.js b/tests/electron/modules/compliments_spec.js
index 1cb23914..50332b0b 100644
--- a/tests/electron/modules/compliments_spec.js
+++ b/tests/electron/modules/compliments_spec.js
@@ -5,6 +5,7 @@ describe("Compliments module", () => {
 	/**
 	 * move similar tests in function doTest
 	 * @param {Array} complimentsArray The array of compliments.
+	 * @param {string} state The state of the element (e.g., "visible" or "attached").
 	 * @returns {boolean} result
 	 */
 	const doTest = async (complimentsArray, state = "visible") => {