### Install FlowerKit

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/README.md

Install the package using npm.

```bash
npm i @web3r/flowerkit
```

--------------------------------

### Install dependencies

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/CONTRIBUTING.md

Use this command to install the locked dependency versions after cloning the repository.

```bash
npm ci
```

--------------------------------

### Conventional commit examples

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/CONTRIBUTING.md

Examples of commit messages following the Conventional Commits format.

```text
feat(fn): add cancelable delay utility
fix(dom): preserve nodes during wrapper cleanup
docs(arr): clarify grouping examples
```

--------------------------------

### Perform HTTP GET request with getFromServer

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/net.md

Executes a basic GET request to retrieve user data.

```ts
const user = await getFromServer<{ userId: number }>({ url: "/api/user?id=1", method: "GET" });
```

--------------------------------

### Basic and Debounced Window Resize Handling

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/evt.md

Examples showing simple resize logging and a debounced implementation for performance-sensitive tasks.

```ts
onWindowResize(() => console.log("resized"));
```

```ts
// Recalculate a responsive grid after resize with a 200 ms debounce
const resize = onWindowResize(() => updateGridColumns(window.innerWidth), 200);
resize.removeListener();
```

--------------------------------

### getStrWithCapitalized

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/str.md

Gets a string with uppercase first letter.

```APIDOC
## getStrWithCapitalized(str: string) -> string

### Description
Gets a string with the first letter capitalized.

### Parameters
- **str** (string) - Required - Source string

### Returns
- (string) - String with first character uppercased
```

--------------------------------

### getThrottledFn

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/fn.md

Gets a throttled function with specific delay.

```APIDOC
## getThrottledFn

### Description
Gets a throttled function with specific delay. Returns a throttled function with cancel, flush, and pending controls.

### Signature
`getThrottledFn<T extends (...args: any[]) => any>(func: T, delay?: number) => TThrottledFn<T>`

### Parameters
- **func** (function) - Required - The function to throttle.
- **delay** (number) - Optional - Delay in ms, 1000 by default.
```

--------------------------------

### getStrWithThousandSeparator

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/str.md

Gets a formatted string with thousands separators.

```APIDOC
## getStrWithThousandSeparator(num: number, separator?: string) -> string

### Description
Gets a formatted string with thousands separators in the integer part of a number.

### Parameters
- **num** (number) - Required - Source number
- **separator** (string) - Optional - Separator to insert between each group of three digits

### Returns
- (string) - Formatted string
```

--------------------------------

### getStorage

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/user.md

Safely gets browser local or session storage. Returns null during SSR or when storage access is blocked.

```APIDOC
## getStorage(type?: TStorageType) -> Storage | null

### Description
Safely gets browser local or session storage. Returns null during SSR or when storage access is blocked.

### Parameters
- **type** (TStorageType) - Optional - Storage type

### Returns
- **Storage | null** - Browser storage when available
```

--------------------------------

### getPureDate

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/date.md

Gets a new Date instance without time (hours, minutes, seconds, and milliseconds).

```APIDOC
## getPureDate(date?: any) => Date | null

### Description
Returns a new Date instance with time components set to zero.

### Parameters
- **date** (any) - Optional - Source date

### Returns
- **Date | null** - New Date instance or null for an invalid value
```

--------------------------------

### getRandomIntFromInterval

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/num.md

Gets a random integer between min and max (inclusive).

```APIDOC
## getRandomIntFromInterval

### Description
Gets a random integer between min and max (inclusive).

### Signature
`(min?: number, max?: number) => number`

### Parameters
- **min** (number) - Min value
- **max** (number) - Max value

### Returns
- **number** - Random integer in [min, max]
```

--------------------------------

### Build the project

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/CONTRIBUTING.md

Run the build command to perform checks and generate package output and API documentation.

```bash
npm run build
```

--------------------------------

### onWindowLoad

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/evt.md

Runs a callback when the window load event fires.

```APIDOC
## onWindowLoad(cb, isAutoInit?)

### Description
Runs a callback when the window load event fires. Executes immediately if already loaded.

### Parameters
- **cb** ((e?: Event) => void) - Required - Callback to run on load
- **isAutoInit** (boolean) - Optional - Attach immediately

### Example
```ts
const { removeListener } = onWindowLoad(() => console.log("Loaded"));
```
```

--------------------------------

### Run verification commands

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/CONTRIBUTING.md

Execute these commands to verify the package, coverage, and build before opening a pull request.

```bash
npm run build
npm run test:coverage
npm run verify:size
npm run verify:package
```

--------------------------------

### Checking bundle sizes

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/README.md

Commands to verify current bundle sizes and enforce regression budgets.

```bash
npm run size
```

```bash
npm run verify:size
```

--------------------------------

### getMinFromArr

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/num.md

Gets min number from an array of numbers.

```APIDOC
## getMinFromArr

### Description
Gets min number from an array of numbers.

### Signature
`(arr: number[]) => number`

### Parameters
- **arr** (number[]) - Source array of numbers (must be non-empty)

### Returns
- **number** - Minimum value
```

--------------------------------

### onWindowResize(cb, delay?, isAutoInit?)

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/evt.md

Registers a callback to be executed when the window is resized. Supports optional debouncing and automatic initialization.

```APIDOC
## onWindowResize

### Description
Runs a callback on window resize. If `delay` is provided, the callback is debounced.

### Signature
`onWindowResize(cb: (e: Event) => void, delay?: number, isAutoInit?: boolean) => { handler: (e: Event) => void; addListener: () => void; removeListener: () => void; }`

### Parameters
- **cb** (function) - Required - Resize callback function.
- **delay** (number) - Optional - Debounce delay in ms; if falsy, the callback is executed immediately.
- **isAutoInit** (boolean) - Optional - If true, attaches the listener immediately.

### Returns
- **handler** (function) - The event handler function.
- **addListener** (function) - Function to attach the listener.
- **removeListener** (function) - Function to detach the listener.

### Example
```ts
// Basic usage
onWindowResize(() => console.log("resized"));

// With debounce
const resize = onWindowResize(() => updateGridColumns(window.innerWidth), 200);
resize.removeListener();
```
```

--------------------------------

### getMaxFromArr

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/num.md

Gets max number from an array of numbers.

```APIDOC
## getMaxFromArr

### Description
Gets max number from an array of numbers.

### Signature
`(arr: number[]) => number`

### Parameters
- **arr** (number[]) - Source array of numbers (must be non-empty)

### Returns
- **number** - Maximum value
```

--------------------------------

### List utility files

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/AGENTS.md

List all files within the src directory.

```bash
rg --files src
```

```powershell
Get-ChildItem -Recurse -File src | ForEach-Object { $_.FullName }
```

--------------------------------

### getIndexOfEl

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/dom.md

Gets the index of a node relative to its siblings.

```APIDOC
## getIndexOfEl(el: HTMLElement | Element | Node | Document) => number

### Description
Calculates the index of a node relative to its siblings.

### Parameters
- **el** (HTMLElement | Element | Node | Document) - Required - The DOM element to find the index for.
```

--------------------------------

### getElSiblings

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/dom.md

Gets an array of all siblings of a given node.

```APIDOC
## getElSiblings(el: HTMLElement) => ChildNode[]

### Description
Gets an array of all siblings of the provided DOM node.

### Parameters
- **el** (HTMLElement) - Required - The target node to find siblings for.
```

--------------------------------

### onDOMReady

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/evt.md

Runs a callback when the DOM is ready (DOMContentLoaded). If already ready, executes immediately.

```APIDOC
## onDOMReady

### Description
Runs a callback when the DOM is ready (`DOMContentLoaded`). If already ready, executes immediately.

### Signature
`onDOMReady(cb: (e?: Event | undefined) => void, isAutoInit?: boolean | undefined) => { handler: (e?: Event | undefined) => void; addListener: () => void; removeListener: () => void; }`

### Parameters
- **cb** (Function) - Callback to run on DOM ready
- **isAutoInit** (boolean | undefined) - Attach immediately
```

--------------------------------

### getUnion

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/arr.md

Gets union Array of two given Arrays.

```APIDOC
## getUnion

### Description
Gets union Array of two given Arrays.

### Signature
`getUnion<T>(arr1: T[], arr2: T[]) => T[]`

### Parameters
- **arr1** (T[]) - First source Array
- **arr2** (T[]) - Second source Array
```

--------------------------------

### Run development checks

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/CONTRIBUTING.md

Execute these commands to run linting, type checking, and tests.

```bash
npm run lint
npm run typecheck
npm test
```

--------------------------------

### getIntersection

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/arr.md

Gets Array of intersection of two given Arrays.

```APIDOC
## getIntersection

### Description
Gets Array of intersection of two given Arrays.

### Signature
`getIntersection<T>(arr1: T[], arr2: T[]) => T[]`

### Parameters
- **arr1** (T[]) - First source Array
- **arr2** (T[]) - Second source Array
```

--------------------------------

### on

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/evt.md

Creates a managed event listener with explicit add and remove controls.

```APIDOC
## on

### Description
Creates a managed event listener with explicit add and remove controls.

### Signature
`on<TEvent extends Event = Event>(target: EventTarget, type: string, callback: (event: TEvent) => void, options?: boolean | AddEventListenerOptions, isAutoInit?: boolean) => TOnControls`

### Parameters
- **target** (EventTarget) - Event target
- **type** (string) - Event type
- **callback** (Function) - Event callback
- **options** (boolean | AddEventListenerOptions) - Native listener options
- **isAutoInit** (boolean) - Attach immediately
```

--------------------------------

### Importing Network Utilities

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/net.md

Import the necessary functions and types from the @web3r/flowerkit/net package.

```ts
// import functions
import { getExternalScript, getFormDataFromObj, getUrlWithQueryParams, getFromServer, getObjFromFormData, getQueryParams, getQueryParam } from "@web3r/flowerkit/net";

// import types
import type { TGetExternalScriptArgs, TGetExternalScriptReturn, TGetFormDataFromObjArgs, TGetFormDataFromObjReturn, TGetUrlWithQueryParamsArgs, TGetUrlWithQueryParamsReturn, TGetFromServerMethod, TGetFromServerErrorKind, TGetFromServerError, TGetFromServerArgs, TGetFromServerReturn, TGetObjFromFormDataArgs, TGetObjFromFormDataReturn, TQueryParamsInput, TGetQueryParamsArgs, TGetQueryParamsReturn, TGetQueryParamArgs, TGetQueryParamReturn } from "@web3r/flowerkit/net";
```

--------------------------------

### Run development and verification tasks

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/README.md

Standard sequence of commands to run before submitting a pull request.

```bash
npm run lint
npm run typecheck
npm test
npm run build
npm run verify:package
```

--------------------------------

### getDiff

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/arr.md

Gets an array representing the difference between two given arrays.

```APIDOC
## getDiff

### Description
Gets an array representing the difference between two given arrays.

### Signature
`getDiff<T>(arr1: T[], arr2: T[]) => T[]`

### Parameters
- **arr1** (T[]) - First source array
- **arr2** (T[]) - Second source array
```

--------------------------------

### Get Element Index

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/dom.md

Determine the index of a node relative to its siblings.

```typescript
// <ul>
//  <li id="a">A</li>
//  Text node
//  <li id="b">B</li>
//  <li id="c">C</li>
// </ul>
getIndexOfEl(document.querySelector("#c")!) // 2
```

```typescript
// Find the index of a clicked tab among its element siblings
tabs.addEventListener("click", (event) => {
  if (event.target instanceof Element) selectTab(getIndexOfEl(event.target));
});
```

--------------------------------

### Creating Typed Storage Namespaces

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/user.md

Initializes a JSON-backed storage controller with optional namespace and error handling.

```ts
const settings = createStorage<{ theme: "light"|"dark" }>({ namespace: "app" });
settings.set("theme", "dark");
```

```ts
// Persist a typed shopping cart and restore it with a fallback
const cartStorage = createStorage<{ items: Array<{ id: string; quantity: number; }> }>({
  namespace: "shop",
});
cartStorage.set("items", cartItems);
const savedItems = cartStorage.get("items", []);
```

--------------------------------

### getAsyncMap

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/arr.md

Gets an aggregated result of an async operation for each element of a given array.

```APIDOC
## getAsyncMap

### Description
Gets an aggregated result of an async operation for each element of a given array.

### Signature
`getAsyncMap<T, U>(arr: T[], callback: (value: T, index: number, array: T[]) => U or Promise<U>) => Promise<U[]>`

### Parameters
- **arr** (T[]) - Source array
- **callback** (function) - Callback function (can be sync or async)
```

--------------------------------

### Handle window load events with onWindowLoad

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/evt.md

Executes a callback when the window load event fires, or immediately if the window is already loaded.

```ts
const { removeListener } = onWindowLoad(() => console.log("Loaded"));
```

```ts
// Hide a loading screen after images and stylesheets finish loading
onWindowLoad(() => document.querySelector("[data-loader]")?.remove());
```

--------------------------------

### getDateDiff

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/date.md

Gets the signed elapsed-time difference (left - right) in a selected unit.

```APIDOC
## getDateDiff(left: TDateInput, right: TDateInput, unit?: TDateDiffUnit) => number

### Description
Calculates the signed difference between two dates in the specified unit.

### Parameters
- **left** (TDateInput) - Required - Left date
- **right** (TDateInput) - Required - Right date
- **unit** (TDateDiffUnit) - Optional - Unit of time for the difference

### Returns
- **number** - Signed difference, which may be fractional
```

--------------------------------

### Importing User Utilities

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/user.md

Import necessary functions and types from the @web3r/flowerkit/user package.

```ts
// import functions
import { copyToClipboard, getStorage, createStorage, setCookie, deleteCookie, getCookie, getScrollbarWidth, isAdblock, isMobileDevice, isTouchDevice } from "@web3r/flowerkit/user";

// import types
import type { TCopyToClipboardArgs, TCopyToClipboardReturn, TStorageType, TGetStorageArgs, TGetStorageReturn, TStorageController, TCreateStorageArgs, TCreateStorageReturn, TSetCookieArgs, TSetCookieReturn, TDeleteCookieArgs, TDeleteCookieReturn, TGetCookieArgs, TGetCookieReturn, TGetScrollbarWidthArgs, TGetScrollbarWidthReturn, TIsAdblockArgs, TIsAdblockReturn, TIsMobileDeviceArgs, TIsMobileDeviceReturn, TIsTouchDeviceArgs, TIsTouchDeviceReturn } from "@web3r/flowerkit/user";
```

--------------------------------

### getLastFromIterable

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/arr.md

Gets the last element of an iterable object such as Array, NodeList, HTMLCollection, etc.

```APIDOC
## getLastFromIterable

### Description
Gets the last element of an iterable object such as Array, NodeList, HTMLCollection, etc.

### Signature
`getLastFromIterable<T>(obj: ArrayLike<T> and Iterable<T>) => T or null`
```

--------------------------------

### Importing Object Utilities

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/obj.md

Import the necessary functions and types from the @web3r/flowerkit/obj package.

```typescript
// import functions
import { getAllSamePropsFromObj, getCopyOfObj, getMapFromObj, getMergedObj, getObjFromFormData, getObjLength, getObjValueByPath, getObjWithFallbacks, getObjWithoutUndefined, getObjWithOmittedProps, getObjWithPickedProps, isObjEmpty, isObjEqual, isObjHasOwnProp, isObjPromise, isObjPrototypeOf } from "@web3r/flowerkit/obj";

// import types
import type { TGetAllSamePropsFromObjArgs, TGetAllSamePropsFromObjReturn, TGetCopyOfObjArgs, TGetCopyOfObjReturn, TGetMapFromObjArgs, TGetMapFromObjReturn, TGetMergedObjArgs, TGetMergedObjReturn, TGetObjFromFormDataArgs, TGetObjFromFormDataReturn, TGetObjLengthArgs, TGetObjLengthReturn, TObjPath, TGetObjValueByPathArgs, TGetObjValueByPathReturn, TGetObjWithFallbacksArgs, TGetObjWithFallbacksReturn, TGetObjWithoutUndefinedArgs, TGetObjWithoutUndefinedReturn, TGetObjWithOmittedPropsArgs, TGetObjWithOmittedPropsReturn, TGetObjWithPickedPropsArgs, TGetObjWithPickedPropsReturn, TIsObjEmptyArgs, TIsObjEmptyReturn, TIsObjEqualArgs, TIsObjEqualReturn, TIsObjHasOwnPropArgs, TIsObjHasOwnPropReturn, TIsObjPromiseArgs, TIsObjPromiseReturn, TIsObjPrototypeOfArgs, TIsObjPrototypeOfReturn } from "@web3r/flowerkit/obj";
```

--------------------------------

### Get Element Siblings

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/dom.md

Retrieve an array of sibling nodes for a given DOM element.

```typescript
// How to get all siblings of `li` DOM-element with specific ID?
// <ul>
//   <li id="item1">One</li>
//   <li id="item2">Two</li>
//   <li id="item3">Three</li>
// <ul>
const secondItem = document.getElementById("item2");
getElSiblings(secondItem).filter(item => item !== secondItem) // [ li#item1, li#item3 ]
```

```typescript
// Remove the active state from sibling tabs before selecting a new tab
getElSiblings(activeTab).forEach((tab) => tab.classList.remove("active"));
```

--------------------------------

### Execute project maintenance commands

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/AGENTS.md

Standard npm commands for managing dependencies, linting, testing, and building the project.

```bash
npm.cmd install
```

```bash
npm.cmd run lint
```

```bash
npm.cmd exec -- eslint lib rollup.config.ts eslint.config.ts commitlint.config.ts
```

```bash
npm.cmd run typecheck
```

```bash
npm.cmd test
```

```bash
npm.cmd run test:coverage
```

```bash
node ./lib/scripts/docs.ts
```

```bash
npm.cmd run verify:size
```

```bash
npm.cmd run verify:package
```

```bash
npm.cmd run build
```

--------------------------------

### getFromServer

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/net.md

Performs an HTTP request using fetch with built-in defaults, content-type handling, and query parameter construction.

```APIDOC
## getFromServer

### Description
Performs an HTTP request with handy defaults, content-type handling, query param building, and optional bubbling of a "getFromServer" event.

### Signature
`getFromServer<TResp = unknown, TSuccess = TResp>(props?: TGetFromServerArgs<TResp, TSuccess>) => Promise<TSuccess>`

### Parameters
- **props** (TGetFromServerArgs) - Optional - Request parameters including url, method, data, headers, and fetch configuration.

### Example
```ts
const user = await getFromServer<{ userId: number }>({ url: "/api/user?id=1", method: "GET" });
```
```

--------------------------------

### Get minimum value from array in TypeScript

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/num.md

Retrieves the smallest number from a non-empty array of numbers.

```ts
// How to get min number from Array of numbers?
const arr = [ 100, 200, 300 ];
const min = getMinFromArr(arr);
console.log(min); // 100
```

```ts
// Find the lowest product price in a catalog
const lowestPrice = getMinFromArr(products.map((product) => product.price));
```

--------------------------------

### Import Flowerkit Date Utilities

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/date.md

Import the necessary functions and types from the @web3r/flowerkit/date package.

```ts
// import functions
import { getDateAdded, getDateDiff, getDateFormatted, isValidDate, getPureDate } from "@web3r/flowerkit/date";

// import types
import type { TDateInput, TGetDateAddedArgs, TGetDateAddedReturn, TGetDateDiffArgs, TGetDateDiffReturn, TGetDateFormattedArgs, TGetDateFormattedReturn, TIsValidDateArgs, TIsValidDateReturn, TGetPureDateArgs, TGetPureDateReturn } from "@web3r/flowerkit/date";
```

--------------------------------

### Get maximum value from array in TypeScript

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/num.md

Retrieves the largest number from a non-empty array of numbers.

```ts
// How to get max number from Array of numbers?
const arr = [ 100, 200, 300 ];
const max = getMaxFromArr(arr);
console.log(max); // 300
```

```ts
// Find the highest value for a chart scale
const chartMax = getMaxFromArr(points.map((point) => point.value));
```

--------------------------------

### Get CSS variable values

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/css.md

Retrieve the value of a CSS custom property, optionally formatted as a number.

```ts
// How to get CSS3 variable value from an element?
const block = document.querySelector("#myBlock"); // <div id="myBlock" style="--myVar: value;">
getCSSVar(block, "--myVar"); // or just "myVar"
```

```ts
// Read a numeric spacing token from CSS in JavaScript
const spacing = getCSSVar(document.documentElement, "spacing", true);
console.log(spacing); // number
```

--------------------------------

### Import FlowerKit Event Utilities

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/evt.md

Import the necessary functions and types from the @web3r/flowerkit/evt package.

```ts
// import functions
import { bubble, on, onClickOutside, onDOMReady, onIntersection, onMediaQueryChange, onResizeObserved, onSwipe, onWindowLoad, onWindowResize } from "@web3r/flowerkit/evt";

// import types
import type { TBubbleArgs, TBubbleReturn, TOnControls, TOnArgs, TOnReturn, TOnClickOutsideOptions, TOnClickOutsideArgs, TOnClickOutsideReturn, TOnDOMReadyArgs, TOnDOMReadyReturn, TOnIntersectionArgs, TOnIntersectionReturn, TOnMediaQueryChangeArgs, TOnMediaQueryChangeReturn, TOnResizeObservedArgs, TOnResizeObservedReturn, TOnSwipeArgs, TOnSwipeReturn, TOnWindowLoadArgs, TOnWindowLoadReturn, TOnWindowResizeArgs, TOnWindowResizeReturn } from "@web3r/flowerkit/evt";
```

--------------------------------

### Get computed CSS values

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/css.md

Retrieve the computed value of a specific CSS property for a DOM element.

```ts
// How to get "height" prop of div from JS?
const block = document.querySelector("#myBlock");
getCSSValue(block, "height");
```

```ts
// Check whether a responsive navigation element is currently hidden
const display = getCSSValue(navigation, "display");
const isNavigationHidden = display === "none";
```

--------------------------------

### Importing DOM Utilities

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/dom.md

Import the necessary functions and types from the @web3r/flowerkit/dom package.

```typescript
// import functions
import { getElSiblings, getElWrapper, getHTMLFromStr, getIndexOfEl, getScrollParent, isNode, removeChildNodes } from "@web3r/flowerkit/dom";

// import types
import type { TGetElSiblingsArgs, TGetElSiblingsReturn, TGetElWrapperArgs, TGetElWrapperReturn, TGetHTMLFromStrArgs, TGetHTMLFromStrReturn, TGetIndexOfElArgs, TGetIndexOfElReturn, TScrollAxis, TGetScrollParentArgs, TGetScrollParentReturn, TIsNodeArgs, TIsNodeReturn, TRemoveChildNodesArgs, TRemoveChildNodesReturn } from "@web3r/flowerkit/dom";
```

--------------------------------

### Get Scroll Parent

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/dom.md

Find the nearest ancestor element that acts as a scroll container for a specific axis.

```typescript
const scrollContainer = getScrollParent(dropdownTrigger);
scrollContainer?.addEventListener("scroll", repositionDropdown);
```

```typescript
// Use the vertical scroll parent as an IntersectionObserver root
const root = getScrollParent(loadMoreButton, "y");
const observer = new IntersectionObserver(loadNextPage, { root });
```

--------------------------------

### Importing Flowerkit string utilities

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/str.md

Import the necessary functions and types from the @web3r/flowerkit/str module.

```ts
// import functions
import { getId, getStrDeclination, getStrEscaped, getStrTruncated, getStrUnescaped, getStrWithCamelCase, getStrWithCapitalized, getStrWithKebabCase, getStrWithNormalizedSpaces, getStrWithSlug, getStrWithSnakeCase, getStrWithThousandSeparator, getStrWithZeroFromNum, getWords, isStrInCamelCase, isStrInKebabCase, isStrInSnakeCase, isStrUrl } from "@web3r/flowerkit/str";

// import types
import type { TGetIdArgs, TGetIdReturn, TGetStrDeclinationArgs, TGetStrDeclinationReturn, TGetStrEscapedArgs, TGetStrEscapedReturn, TGetStrTruncatedArgs, TGetStrTruncatedReturn, TGetStrUnescapedArgs, TGetStrUnescapedReturn, TGetStrWithCamelCaseArgs, TGetStrWithCamelCaseReturn, TGetStrWithCapitalizedArgs, TGetStrWithCapitalizedReturn, TGetStrWithKebabCaseArgs, TGetStrWithKebabCaseReturn, TGetStrWithNormalizedSpacesArgs, TGetStrWithNormalizedSpacesReturn, TGetStrWithSlugArgs, TGetStrWithSlugReturn, TGetStrWithSnakeCaseArgs, TGetStrWithSnakeCaseReturn, TGetStrWithThousandSeparatorArgs, TGetStrWithThousandSeparatorReturn, TGetStrWithZeroFromNumArgs, TGetStrWithZeroFromNumReturn, TGetWordsArgs, TGetWordsReturn, TIsStrInCamelCaseArgs, TIsStrInCamelCaseReturn, TIsStrInKebabCaseArgs, TIsStrInKebabCaseReturn, TIsStrInSnakeCaseArgs, TIsStrInSnakeCaseReturn, TIsStrUrlArgs, TIsStrUrlReturn } from "@web3r/flowerkit/str";
```

--------------------------------

### Importing Array Utilities

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/arr.md

Import the necessary functions and types from the @web3r/flowerkit/arr module.

```typescript
// import functions
import { getArrSortedBy, getAsyncMap, getChunkedArr, getDiff, getGroupedBy, getIntersection, getLastFromIterable, getUnion, getUniqueBy, isItemsEqual, isIterable, isNonEmptyArr } from "@web3r/flowerkit/arr";

// import types
import type { TArrSortDirection, TArrSortNulls, TArrSortValue, TGetArrSortedByOptions, TGetArrSortedByArgs, TGetArrSortedByReturn, TGetAsyncMapArgs, TGetAsyncMapReturn, TGetChunkedArrArgs, TGetChunkedArrReturn, TGetDiffArgs, TGetDiffReturn, TGetGroupedByArgs, TGetGroupedByReturn, TGetIntersectionArgs, TGetIntersectionReturn, TGetLastFromIterableArgs, TGetLastFromIterableReturn, TGetUnionArgs, TGetUnionReturn, TGetUniqueByArgs, TGetUniqueByReturn, TIsItemsEqualArgs, TIsItemsEqualReturn, TIsIterableArgs, TIsIterableReturn, TIsNonEmptyArrArgs, TIsNonEmptyArrReturn } from "@web3r/flowerkit/arr";
```

--------------------------------

### Test media queries

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/css.md

Check if a media query string matches the current environment.

```ts
// How to check if a user device has portrait or landscape orientation?
const mediaQuery = "(orientation: portrait)";
const isPortrait = isMediaQuery(mediaQuery);
console.log(isPortrait); // => false
```

```ts
// Disable decorative animation when the user prefers reduced motion
const shouldReduceMotion = isMediaQuery("(prefers-reduced-motion: reduce)");
```

--------------------------------

### Get CSS transform values

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/css.md

Retrieve x, y, and z translation values from an element's transform style.

```ts
// How to get `translate3d` values of a `div`?
// <div id="block" style="transform: translate3d(10px, 15px, 35px);"></div>
const block = document.getElementById("block");
const values = getCSSTransformValues(block);
console.log(values); // => { x: 10, y: 15, z: 35 }
```

```ts
// Read the current translated position before continuing a drag animation
const { x, y } = getCSSTransformValues(draggableElement);
draggableElement.style.transform = `translate(${x + 20}px, ${y}px)${`
```

--------------------------------

### Import JSON utilities

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/json.md

Import the necessary functions and types from the @web3r/flowerkit/json module.

```ts
// import functions
import { getJSONFromStr, isJSON } from "@web3r/flowerkit/json";

// import types
import type { TGetJSONFromStrArgs, TGetJSONFromStrReturn, TIsJSONArgs, TIsJSONReturn } from "@web3r/flowerkit/json";
```

--------------------------------

### isMediaQuery

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/css.md

Tests a CSS media query string against the current environment.

```APIDOC
## isMediaQuery(str: string)

### Description
Tests a CSS media query string and returns whether it matches the current environment.

### Parameters
- **str** (string) - Required - The media query string to test.

### Returns
- **boolean** - True if the media query matches, false otherwise.
```

--------------------------------

### Validate camelCase strings with isStrInCamelCase

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/str.md

Checks if a string starts with lowercase letters and contains at least one capitalized segment.

```ts
isStrInCamelCase("abcDef"); // true
isStrInCamelCase("Word"); // false
```

```ts
// Validate JavaScript-style keys imported from a configuration file
const invalidKeys = Object.keys(config).filter((key) => !isStrInCamelCase(key));
```

--------------------------------

### Strip Time from Dates

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/date.md

Get a new Date instance with time components (hours, minutes, seconds, milliseconds) set to zero.

```ts
// How to get a date without time e.g., hours, minutes, seconds, and milliseconds?
const dateWithTime = new Date();
console.log(dateWithTime.getMilliseconds()); // => {number}
const dateWithoutTime = getPureDate(dateWithTime);
console.log(dateWithoutTime.getMilliseconds()); // => 0
```

```ts
// Compare calendar dates while ignoring their time values
const isDueToday = getPureDate(task.dueAt)?.getTime()
  === getPureDate(new Date())?.getTime();
```

--------------------------------

### Importing FlowerKit utilities

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/README.md

Use subpath imports to optimize bundle size or import via namespace kits. Supports both ESM and CommonJS environments.

```ts
// ESM
import { getUniqueBy } from "@web3r/flowerkit/arr";
import { onIntersection, onSwipe } from "@web3r/flowerkit/evt";

// Namespace kits
import { arrKit, evtKit } from "@web3r/flowerkit";

// CommonJS
const { getUniqueBy } = require("@web3r/flowerkit/arr");

// Public types
import type { TOnSwipeArgs, TOnSwipeReturn } from "@web3r/flowerkit/evt";
```

--------------------------------

### Import CSS utility functions and types

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/css.md

Import the necessary functions and TypeScript types from the package.

```ts
// import functions
import { getCSSTransformValues, getCSSValue, getCSSVar, isMediaQuery, isSelectorValid, removeCSSVar, setCSSVar } from "@web3r/flowerkit/css";

// import types
import type { TGetCSSTransformValuesArgs, TGetCSSTransformValuesReturn, TGetCSSValueArgs, TGetCSSValueReturn, TGetCSSVarArgs, TGetCSSVarReturn, TIsMediaQueryArgs, TIsMediaQueryReturn, TIsSelectorValidArgs, TIsSelectorValidReturn, TRemoveCSSVarArgs, TRemoveCSSVarReturn, TSetCSSVarArgs, TSetCSSVarReturn } from "@web3r/flowerkit/css";
```

--------------------------------

### Find SSR-window usage

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/AGENTS.md

Search for references to ssr-window within the source code.

```bash
rg "ssr-window" src
```

```powershell
Get-ChildItem -Recurse -File src | Select-String -Pattern "ssr-window"
```

--------------------------------

### Manage media query listeners with onMediaQueryChange

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/evt.md

Attaches listeners to CSS media queries with automatic cleanup support. Safe to use in SSR environments where matchMedia is unavailable.

```ts
onMediaQueryChange("(prefers-color-scheme: dark)", ({ matches }) => setDark(matches));
```

```ts
// React to a desktop breakpoint without leaking a matchMedia listener
const desktop = onMediaQueryChange("(min-width: 1024px)", ({ matches }) => {
  setSidebarExpanded(matches);
});
desktop.removeListener();
```

--------------------------------

### onMediaQueryChange

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/evt.md

Creates a managed listener for changes to a CSS media query.

```APIDOC
## onMediaQueryChange(query, callback, isAutoInit?)

### Description
Creates a managed listener for changes to a CSS media query. It is a no-op when matchMedia is unavailable.

### Parameters
- **query** (string) - Required - Media query
- **callback** ((event: MediaQueryListEvent) => void) - Required - Change callback
- **isAutoInit** (boolean) - Optional - Attach immediately

### Example
```ts
onMediaQueryChange("(prefers-color-scheme: dark)", ({ matches }) => setDark(matches));
```
```

--------------------------------

### Importing Number Utility Functions and Types

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/num.md

Import the necessary utility functions and their corresponding TypeScript types from the @web3r/flowerkit/num package.

```typescript
// import functions
import { getClampedNum, getCurrencyFormatted, getMaxFromArr, getMinFromArr, getNumberFormatted, getRandomIntFromInterval, getRounded } from "@web3r/flowerkit/num";

// import types
import type { TGetClampedNumArgs, TGetClampedNumReturn, TGetCurrencyFormattedArgs, TGetCurrencyFormattedReturn, TGetMaxFromArrArgs, TGetMaxFromArrReturn, TGetMinFromArrArgs, TGetMinFromArrReturn, TGetNumberFormattedArgs, TGetNumberFormattedReturn, TGetRandomIntFromIntervalArgs, TGetRandomIntFromIntervalReturn, TGetRoundedArgs, TGetRoundedReturn } from "@web3r/flowerkit/num";
```

--------------------------------

### createStorage

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/user.md

Creates a typed, JSON-backed and SSR-safe storage namespace. Operations return fallbacks or false when storage is unavailable.

```APIDOC
## createStorage(options?: { namespace?: string; onError?: (error: unknown) => void; storage?: Storage | null; }) -> TStorageController

### Description
Creates a typed, JSON-backed and SSR-safe storage namespace. Operations return fallbacks or false when storage is unavailable.

### Parameters
- **options** (Object) - Optional - Options; namespace defaults to "flowerkit"

### Returns
- **TStorageController** - Storage controller
```

--------------------------------

### Calculate per-kit public utility counts via PowerShell

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/AGENTS.md

Iterates through specific utility kits to report the count of exported functions for each.

```powershell
foreach($m in 'arr','css','date','dom','evt','fn','json','net','num','obj','str','user'){ $counts = Get-ChildItem "src/$m" -Recurse -File -Filter index.ts | ForEach-Object { ([regex]::Matches((Get-Content -Raw $_.FullName), '(?m)^export const\s+(?!_)\w+\s*=')).Count }; "$m=$(($counts | Measure-Object -Sum).Sum)" }
```

--------------------------------

### Create Managed Event Listeners with on

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/evt.md

Create event listeners that return controls for manual removal, useful for component lifecycle management.

```ts
const listener = on(window, "online", () => sync());
listener.removeListener();
```

```ts
// Attach a keyboard shortcut now and remove it during component cleanup
const escapeKey = on<KeyboardEvent>(document, "keydown", (event) => {
  if (event.key === "Escape") closeDialog();
});
escapeKey.removeListener();
```

--------------------------------

### Importing Flowerkit Functions

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/fn.md

Import the necessary utility functions and their corresponding TypeScript types from the package.

```typescript
// import functions
import { getAbortSignal, getAsyncPool, getCurryFn, getDebouncedFn, getMemoizedFn, getLatestAsyncFn, getRetriedFn, getThrottledFn, isFnAsync, isFnClass, once, wait } from "@web3r/flowerkit/fn";

// import types
import type { TAbortSignalControls, TGetAbortSignalOptions, TGetAbortSignalArgs, TGetAbortSignalReturn, TGetAsyncPoolOptions, TGetAsyncPoolResult, TGetAsyncPoolArgs, TGetAsyncPoolReturn, TGetCurryFnArgs, TGetCurryFnReturn, TDebouncedFn, TGetDebouncedFnArgs, TGetDebouncedFnReturn, TMemoizedFn, TGetMemoizedFnArgs, TGetMemoizedFnReturn, TGetLatestAsyncFnOptions, TLatestAsyncFn, TLatestAsyncSource, TGetLatestAsyncFnArgs, TGetLatestAsyncFnReturn, TRetryOptions, TGetRetriedFnArgs, TGetRetriedFnReturn, TThrottledFn, TGetThrottledFnArgs, TGetThrottledFnReturn, TIsFnAsyncArgs, TIsFnAsyncReturn, TIsFnClassArgs, TIsFnClassReturn, TOnceArgs, TOnceReturn, TWaitOptions, TWaitArgs, TWaitReturn } from "@web3r/flowerkit/fn";
```

--------------------------------

### Handle DOM Ready State with onDOMReady

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/evt.md

Execute code once the DOM is fully parsed, or immediately if the event has already fired.

```ts
onDOMReady(() => console.log("DOM ready"));
```

```ts
// Initialize client-side widgets after the HTML document is parsed
const ready = onDOMReady(() => initializeWidgets("[data-widget]"));
ready.removeListener();
```

--------------------------------

### Handle getFromServer errors

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/net.md

Demonstrates error handling for network requests, specifically checking for HTTP-related errors.

```ts
import type { TGetFromServerError } from "@web3r/flowerkit/net";

try {
  await getFromServer({ url: "/api/user" });
} catch (error) {
  if (error instanceof Error && error.name === "GetFromServerError") {
    const requestError = error as TGetFromServerError;
    if (requestError.kind === "http") {
      console.error(requestError.status, requestError.response);
    }
  }
}
```

--------------------------------

### Verify package integrity

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/README.md

Executes the verification script to test the packed artifact against public entry points.

```bash
npm run verify:package
```

--------------------------------

### isStrInKebabCase(str: string) => boolean

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/str.md

Checks if a string follows kebab-case naming conventions.

```APIDOC
## isStrInKebabCase(str: string)

### Description
Checks if a string is in kebab-case. Rules: Lowercase letters separated by single hyphens, with no leading or trailing hyphens.

### Parameters
- **str** (string) - Required - The source string to check.

### Returns
- **boolean** - True if the string is kebab-case.
```

--------------------------------

### getElWrapper

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/dom.md

Wraps a specific DOM element with a provided HTML layout string.

```APIDOC
## getElWrapper(el: HTMLElement, str: string) => HTMLElement

### Description
Wraps a specific element with a provided HTML layout string, supporting nested blocks.

### Parameters
- **el** (HTMLElement) - Required - The DOM element to wrap.
- **str** (string) - Required - The HTML layout string to use as a wrapper.
```

--------------------------------

### getStrWithSlug

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/str.md

Creates a lowercase Unicode slug.

```APIDOC
## getStrWithSlug(str: string, options?: { separator?: string; locale?: string }) -> string

### Description
Creates a lowercase Unicode slug. Diacritics are removed, while non-Latin letters such as Cyrillic are preserved.

### Parameters
- **str** (string) - Required - Source string
- **options** (object) - Optional - Slug options (separator, locale)

### Returns
- (string) - Slug
```

--------------------------------

### wait(ms, options)

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/fn.md

Returns a Promise that resolves after a specified duration. It supports optional cancellation using an AbortSignal.

```APIDOC
## wait(ms, options)

### Description
Gets a Promise that resolves after a specific time. This is useful for introducing delays in asynchronous sequences or handling timeouts.

### Signature
`(ms?: number, options?: TWaitOptions) => Promise<void>`

### Parameters
- **ms** (number) - Optional - The delay duration in milliseconds.
- **options** (TWaitOptions) - Optional - Configuration object containing an optional cancellation signal.

### Usage Example
```ts
// Delay the next step in an async animation sequence
await wait(200);
element.classList.add("is-visible");

// Cancel a pending delay during component cleanup
const lifecycle = new AbortController();
await wait(1_000, { signal: lifecycle.signal });
lifecycle.abort();
```
```

--------------------------------

### getStrWithKebabCase

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/str.md

Converts a string to kebab-case.

```APIDOC
## getStrWithKebabCase(str: string) -> string

### Description
Converts a string to kebab-case.

### Parameters
- **str** (string) - Required - Source string

### Returns
- (string) - kebab-case string
```

--------------------------------

### Using getCurryFn

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/fn.md

Transform functions into sequences of unary functions for partial application.

```typescript
function sum(a: number, b: number) { return a + b; }
const curried = getCurryFn(sum);
curried(1)(2); // 3
```

```typescript
// Build reusable field validators from a curried range check
const isInRange = getCurryFn((min: number, max: number, value: number) => {
  return value >= min && value <= max;
});
const isValidPercentage = isInRange(0)(100);
```

--------------------------------

### getFormDataFromObj

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/net.md

Builds a FormData instance from a plain object.

```APIDOC
## getFormDataFromObj

### Description
Builds a FormData instance from a plain object.

### Signature
`(obj?: TSourceObject, fd?: FormData, setItem?: TSetItemFunction) => FormData`

### Parameters
- **obj** (object) - Optional - Source object
- **fd** (FormData) - Optional - Existing FormData to append to
- **setItem** (function) - Optional - Custom setter per entry

### Returns
Result FormData
```

--------------------------------

### Find all tests

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/AGENTS.md

Locate all test files ending in index.test.ts.

```bash
rg --files src | rg "index\.test\.ts$"
```

```powershell
Get-ChildItem -Recurse -File src -Filter index.test.ts | ForEach-Object { $_.FullName }
```

--------------------------------

### Handle Repeated Form Values

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/net.md

Demonstrates how the utility preserves multiple values for the same key, such as checkboxes.

```ts
// Preserve repeated checkbox values when converting a form submission
const data = new FormData(form);
const values = getObjFromFormData(data);
console.log(values.category); // string, File, or an array of repeated values
```

--------------------------------

### Detect ad-blockers with isAdblock

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/user.md

Infers the presence of an ad-blocker by measuring the visibility of an injected ad-like element.

```ts
const blocked = isAdblock();
console.log(blocked); // => false
```

```ts
// Offer an ad-free subscription when an ad blocker is detected
if (isAdblock()) showAdFreeSubscriptionNotice();
```

--------------------------------

### copyToClipboard

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/user.md

Copies text to the clipboard using the Clipboard API with a legacy fallback. Returns false when clipboard access is unavailable or denied.

```APIDOC
## copyToClipboard(text: string) -> Promise<boolean>

### Description
Copies text to the clipboard using the Clipboard API with a legacy fallback. Returns false when clipboard access is unavailable or denied.

### Parameters
- **text** (string) - Required - Text to copy

### Returns
- **boolean** - Whether copying succeeded
```

--------------------------------

### getQueryParam

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/net.md

Retrieves the first value of a specific URL query parameter.

```APIDOC
## getQueryParam

### Description
Gets the first value of a URL query parameter.

### Signature
`(name: string, input?: TQueryParamsInput) => string | null`

### Parameters
- **name** (string) - Required - Parameter name.
- **input** (TQueryParamsInput) - Optional - URL, query string, or URLSearchParams; defaults to current URL.

### Example
```ts
getQueryParam("page", "?page=2"); // "2"
```
```

--------------------------------

### Find exported symbols in kit indexes

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/AGENTS.md

Locate exported types or objects within index files in the src subdirectories.

```bash
rg "^export (type )?\{" src/*/index.ts
```

```powershell
Get-ChildItem -File src/*/index.ts | Select-String -Pattern "^export (type )?\{"
```

--------------------------------

### Format Dates

Source: https://github.com/yuri-moskvin/flowerkit/blob/main/docs/date.md

Format a date using Intl.DateTimeFormat.

```ts
getDateFormatted(new Date("2024-01-02T00:00:00Z"), "en-US", { timeZone: "UTC" });
```

```ts
// Format an order date for a Russian storefront
const label = getDateFormatted(order.createdAt, "ru-RU", {
  dateStyle: "long",
  timeZone: "Europe/Moscow",
});
```