diff --git a/src/middleware/watchSyncFlags/index.ts b/src/middleware/watchSyncFlags/index.ts
index 7ed5b05..b401ffb 100644
--- a/src/middleware/watchSyncFlags/index.ts
+++ b/src/middleware/watchSyncFlags/index.ts
@@ -18,7 +18,6 @@ const getDefaultFlags = memo(() =>
 
 /**
  * Constructs a middleware that fills in brInfo and telemetry
- * @param {Array<string>} [inputFlags]
  */
 export const watchSyncFlags =
     (inputFlags?: string[]): MiddlewareGetter =>
diff --git a/src/providers/firstPartyMethod/process/email.ts b/src/providers/firstPartyMethod/process/email.ts
index 3f5a7ca..db342d5 100644
--- a/src/providers/firstPartyMethod/process/email.ts
+++ b/src/providers/firstPartyMethod/process/email.ts
@@ -103,8 +103,7 @@ const checkEmailLength = (email: string): string | undefined => {
  * Validates and normalizes an email.
  * For invalid input returns undefined.
  *
- * @param {string} origEmail email
- * @returns {string | undefined}
+ * @param origEmail email
  */
 export const processEmail = (origEmail: string): string | undefined => {
     const email = trimText(origEmail).replace(/^\++/gm, '').toLowerCase();
diff --git a/src/providers/firstPartyMethod/process/phone.ts b/src/providers/firstPartyMethod/process/phone.ts
index 0a2aa74..7e634f7 100644
--- a/src/providers/firstPartyMethod/process/phone.ts
+++ b/src/providers/firstPartyMethod/process/phone.ts
@@ -19,8 +19,7 @@ const hasLettersRegex = /[a-zа-яё,.]/gi;
  * For invalid input returns undefined.
  *
  * @param {Pick<Window, 'isFinite' | 'isNaN'>} ctx global object that provides isFinite and isNan functions.
- * @param {string} origPhone - phone number
- * @returns {string | undefined}
+ * @param origPhone - phone number
  */
 export const processPhoneNumber = (
     ctx: Window,
diff --git a/src/storage/cookie/cookie.ts b/src/storage/cookie/cookie.ts
index e0f1653..e6060da 100644
--- a/src/storage/cookie/cookie.ts
+++ b/src/storage/cookie/cookie.ts
@@ -46,13 +46,7 @@ export const getCookie: CookieGetter = (ctx: Window, name: string) => {
 const PORT_REGEXP = /:\d+$/;
 
 /**
- * Ставим куки на домен
- * @param ctx
- * @param name
- * @param val
- * @param {number} [minutes]
- * @param {string} [domain]
- * @param {string} [path]
+ * Set cookie for a domain.
  */
 export const setCookie = (
     ctx: Window,
@@ -89,13 +83,7 @@ export const setCookie = (
         }
     }
 };
-/**
- *
- * @param {Object} ctx
- * @param {string} name
- * @param {string} [domain]
- * @param {string} [path]
- */
+
 function deleteCookie(
     ctx: Window,
     name: string,
@@ -106,12 +94,6 @@ function deleteCookie(
     return setCookie(ctx, name, '', -100, domain, path, ignoreState);
 }
 
-/**
- *
- * @param ctx
- * @param {string} [domain]
- * @param {string} [path]
- */
 export const checkCookie = (ctx: Window, domain?: string, path?: string) => {
     const checkName = ENABLED_COOKIE_KEY;
     setCookie(ctx, checkName, '1', 0, domain, path, true);
diff --git a/src/utils/array/utils.ts b/src/utils/array/utils.ts
index 716eb2e..5c7c96d 100644
--- a/src/utils/array/utils.ts
+++ b/src/utils/array/utils.ts
@@ -49,9 +49,6 @@ export const exclude = <T>(from: T[] | readonly T[], what: T[]) => {
 
 /**
  * Checks length property of an array-like and returns a boolean.
- *
- * @param {T extends string | unknown[] } array
- * @returns {boolean}
  */
 export const isEmptyArray = <T extends string | unknown[] | { length: number }>(
     array: T,
@@ -71,6 +68,6 @@ export const last = <T>(arrayOrString: ArrayLike<T>): T | undefined =>
 /**
  * Removes all elements from an array returning the deleted elements.
  *
- * @returns — An array containing the elements that were deleted.
+ * @returns An array containing the elements that were deleted.
  */
 export const clearArray = <T>(array: T[]) => array.splice(0, array.length);
diff --git a/src/utils/dom/element.ts b/src/utils/dom/element.ts
index 220a6d0..947440b 100644
--- a/src/utils/dom/element.ts
+++ b/src/utils/dom/element.ts
@@ -79,13 +79,15 @@ export const getElementSize = (ctx: Window, element: HTMLElement) => {
 };
 
 /**
- * Возвращает позицию и размеры элемента.
+ * @param ctx window element
+ * @param el element to process
  *
- * @param {HTMLElement} el
- *
- * @returns {Array} Массив вида [left, top, width, height].
+ * @returns Position and size of an element.
  */
-export const getElementRegion = (ctx: Window, el: HTMLElement) => {
+export const getElementRegion = (
+    ctx: Window,
+    el: HTMLElement,
+): [left: number, top: number, width: number, height: number] => {
     const { left, top } = getElementXY(ctx, el);
     const [width, height] = getElementSize(ctx, el);
 
@@ -264,18 +266,17 @@ export const getElementsByClassName = (
 };
 
 /**
- * Возвращает массив детей элемента, пропуская hidden элементы формы.
+ * @param ctx
+ * @param el
+ * @param nodeName An optional name of a node used for filtering the result
  *
- * @param {HTMLElement} el
- * @param {String} [nodeName] Если указан этот параметр, то выбираются только дети с таким nodeName.
- *
- * @returns {Array}
+ * @returns An array of element children except hidden form elements
  */
 export const getElementChildren = (
     ctx: Window,
     el?: HTMLElement | null,
     nodeName?: string,
-) => {
+): ChildNode[] => {
     const result = [];
 
     if (el) {
diff --git a/src/utils/errorLogger/errorLogger.ts b/src/utils/errorLogger/errorLogger.ts
index 4738630..181004e 100644
--- a/src/utils/errorLogger/errorLogger.ts
+++ b/src/utils/errorLogger/errorLogger.ts
@@ -5,12 +5,6 @@ import { handleError } from './handleError';
 import { throwFunction } from './throwFunction';
 import { executionTimeErrorDecorator } from './executionTimeErrorDecorator';
 
-/**
- * @param {Object} ctx
- * @param {string} scopeName
- * @param {function(...?): ?} [fn]
- * @param {function (...?): ?} [errorCatch]
- */
 export const errorLogger = <FN extends (...args: any) => ReturnType<FN>>(
     ctx: Window,
     scopeName: string,
diff --git a/src/utils/number/random.ts b/src/utils/number/random.ts
index 2bf14e7..8584734 100644
--- a/src/utils/number/random.ts
+++ b/src/utils/number/random.ts
@@ -4,10 +4,7 @@ export const RND_MAX = 1073741824;
 export const RND_MIN = 1;
 
 /**
- * Генерим рандомное число
- * @param {Object} ctx
- * @param {number} [rawMin]
- * @param {number} [rawMax]
+ * Generate a random number in a given frame
  */
 export const getRandom = (ctx: Window, rawMin?: number, rawMax?: number) => {
     let min: number;
diff --git a/src/utils/object/path.ts b/src/utils/object/path.ts
index ad440c0..23d0336 100644
--- a/src/utils/object/path.ts
+++ b/src/utils/object/path.ts
@@ -59,9 +59,7 @@ export const len = ctxPath('length') as <T>(
 ) => T extends ArrayLike<unknown> ? number : unknown;
 
 /**
- * Получаем из списка [1,2,3] объект {1: {2: 3}}
- * @param {string} path
- * @param {Object} [origCtx]
+ * Transform a list `[1,2,3]` into an object `{1: {2: 3}}`
  */
 export const genPath = (path: (string | number)[], origCtx: any = {}) => {
     if (!path || path.length < 1) {
diff --git a/src/utils/telemetry/telemetry.ts b/src/utils/telemetry/telemetry.ts
index 6302872..6fe3613 100644
--- a/src/utils/telemetry/telemetry.ts
+++ b/src/utils/telemetry/telemetry.ts
@@ -3,9 +3,6 @@ import { entries, isNull } from 'src/utils/object';
 import { flagStorage, FlagStorage } from '../flagsStorage/flagsStorage';
 import { arrayJoin, cMap } from '../array';
 
-/**
- * @param {Object} [ctx]
- */
 export const telemetry = flagStorage((flags) => {
     const flagEntries = entries(flags);
     return arrayJoin(