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Highlights

• Built for React and maintained by the rc-component team.
• Used by Ant Design and other React component libraries.
• Ships TypeScript declarations with both ES module and CommonJS outputs.
• Keeps examples, tests, and preview builds aligned with the package source.

This package was historically published as rc-util. Prefer the scoped package for new code.

Install

npm install @rc-component/util

Usage

import {
  Portal,
  raf,
  useEvent,
  useLayoutEffect,
  warning,
} from '@rc-component/util';

Examples

Run the local dumi site:

npm install
npm start

Then open http://localhost:8000.

API

The package exposes small, focused helpers used across rc-component and Ant Design packages. Import the public entry when possible, and use subpath imports for specialized DOM, React, or test helpers.

Area	Examples
React hooks	useEvent, useLayoutEffect, useMergedState, useState helpers
React utilities	Children/toArray, composeRef, pickAttrs, Portal
DOM utilities	Dom/canUseDom, Dom/contains, Dom/dynamicCSS, Dom/focus, getScrollBarSize
Async helpers	raf, raf.cancel
Warnings	warning, noteOnce, resetWarned
Tests	test/domHook for DOM prototype spies

Examples in docs/examples cover the commonly used subpath helpers.

Development

npm install
npm start
npm test
npm run build

The dumi site runs at http://localhost:8000 by default.

Release

npm run prepublishOnly

The release flow is handled by @rc-component/np through the rc-np command after the package build.

License

@rc-component/util is released under the MIT license.