diff --git a/.eslintrc.json b/.eslintrc.json
index e20dc99236..1b945ee38a 100644
--- a/.eslintrc.json
+++ b/.eslintrc.json
@@ -17,15 +17,6 @@
         "es6": true
     },
     "rules": {
-        "valid-jsdoc": ["error", {
-            "prefer": {
-                "returns": "return"
-            },
-            "requireReturn": false,
-            "requireParamType": false,
-            "requireReturnDescription": false,
-            "requireParamDescription": false
-        }],
         "array-bracket-spacing": "error",
         "brace-style": "error",
         "camelcase": "error",
diff --git a/js/src/main.ts b/js/src/main.ts
index bd546f6404..ebf7f42f18 100644
--- a/js/src/main.ts
+++ b/js/src/main.ts
@@ -1,6 +1,6 @@
 import $ from 'jquery';
 import { AJAX } from './modules/ajax.ts';
-import { Functions } from './modules/functions.ts';
+import { addNoCacheToAjaxRequests, Functions } from './modules/functions.ts';
 import { KeyHandlerEvents } from './modules/keyhandler.ts';
 import { PageSettings } from './modules/page_settings.ts';
 import { crossFramingProtection } from './modules/cross_framing_protection.ts';
@@ -29,7 +29,7 @@ crossFramingProtection();
 AJAX.registerTeardown('main.js', Config.off());
 AJAX.registerOnload('main.js', Config.on());
 
-$.ajaxPrefilter(Functions.addNoCacheToAjaxRequests());
+$.ajaxPrefilter(addNoCacheToAjaxRequests);
 
 AJAX.registerTeardown('main.js', teardownFunctions());
 AJAX.registerOnload('main.js', onloadFunctions());
diff --git a/js/src/modules/functions.ts b/js/src/modules/functions.ts
index 4cbf3f0211..e1be9e508d 100644
--- a/js/src/modules/functions.ts
+++ b/js/src/modules/functions.ts
@@ -62,10 +62,9 @@ window.centralColumnList = [];
 
 /**
  * Make sure that ajax requests will not be cached by appending a random variable to their parameters.
- * @return {function(JQuery.AjaxSettings, JQuery.AjaxSettings): void}
  */
-Functions.addNoCacheToAjaxRequests = () => function (options, originalOptions) {
-    var nocache = new Date().getTime() + '' + Math.floor(Math.random() * 1000000);
+export function addNoCacheToAjaxRequests (options: JQuery.AjaxSettings, originalOptions: JQuery.AjaxSettings): void {
+    const nocache = new Date().getTime() + '' + Math.floor(Math.random() * 1000000);
     if (typeof options.data === 'string') {
         options.data += '&_nocache=' + nocache + '&token=' + encodeURIComponent(CommonParams.get('token'));
     } else if (typeof options.data === 'object') {
@@ -74,7 +73,7 @@ Functions.addNoCacheToAjaxRequests = () => function (options, originalOptions) {
             'token': CommonParams.get('token')
         });
     }
-};
+}
 
 /**
  * Adds a date/time picker to an element