rc-util

What is rc-util?

The rc-util npm package is a collection of utility functions and components designed to be used with React components. It provides a set of tools to help with common tasks in React development such as DOM manipulation, event handling, and component management.

What are rc-util's main functionalities?

DOM manipulation

This feature allows you to get the scroll position of an element or the window. It is useful for handling scroll-related logic in your React components.

import { getScroll } from 'rc-util/lib/Dom/scroll';

const scrollPosition = getScroll(window);
console.log(scrollPosition);

Event handling

This feature provides a way to add and remove event listeners. It is particularly useful for setting up event listeners with the capability to easily remove them later, preventing potential memory leaks.

import { addEventListener } from 'rc-util/lib/Dom/addEventListener';

const removeListener = addEventListener(window, 'resize', () => {
  console.log('Window resized');
});

// To remove the event listener
removeListener();

KeyCode utilities

KeyCode utilities provide a convenient set of constants for key codes, which can be used to improve the readability and maintainability of code that involves keyboard event handling.

import KeyCode from 'rc-util/lib/KeyCode';

const isEnterPressed = (event) => {
  return event.keyCode === KeyCode.ENTER;
};

Other packages similar to rc-util

lodash

Lodash is a comprehensive utility library that offers a wide range of functions for tasks like array manipulation, object handling, and function utilities. It is more general-purpose compared to rc-util, which is more focused on React-specific utilities.

underscore

Underscore is another utility library similar to lodash, providing a range of functions for manipulating data structures and performing common JavaScript tasks. Like lodash, it is not specifically tailored to React.

README

rc-util

Common Utils For React Component.

Install

API

createChainedFunction

(...functions): Function

Create a function which will call all the functions with it's arguments from left to right.

import createChainedFunction from 'rc-util/lib/createChainedFunction';

deprecated

(prop: string, instead: string, component: string): void

Log an error message to warn developers that prop is deprecated.

import deprecated from 'rc-util/lib/deprecated';

getContainerRenderMixin

(config: Object): Object

To generate a mixin which will render specific component into specific container automatically.

import getContainerRenderMixin from 'rc-util/lib/getContainerRenderMixin';

Fields in config and their meanings.

Field	Type	Description	Default
autoMount	boolean	Whether to render component into container automatically	true
autoDestroy	boolean	Whether to remove container automatically while the component is unmounted	true
isVisible	(instance): boolean	A function to get current visibility of the component	-
isForceRender	(instance): boolean	A function to determine whether to render popup even it's not visible	-
getComponent	(instance, extra): ReactNode	A function to get the component which will be rendered into container	-
getContaienr	(instance): HTMLElement	A function to get the container

Portal

Render children to the specific container;

import Portal from 'rc-util/lib/Portal';

Props:

Prop	Type	Description	Default
children	ReactChildren	Content render to the container	-
getContaienr	(): HTMLElement	A function to get the container	-

getScrollBarSize

(fresh?: boolean): number

Get the width of scrollbar.

import getScrollBarSize from 'rc-util/lib/getScrollBarSize';

guid

(): string

To generate a global unique id across current application.

import guid from 'rc-util/lib/guid';

pickAttrs

(props: Object): Object

Pick valid HTML attributes and events from props.

import pickAttrs from 'rc-util/lib/pickAttrs';

warn

(msg: string): void

A shallow wrapper of console.warn.

import warn from 'rc-util/lib/warn';

Children

A collection of functions to operate React elements' children.

Children/mapSelf

(children): children

Return a shallow copy of children.

import mapSelf from 'rc-util/lib/Children/mapSelf';

Children/toArray

(children: ReactNode[]): ReactNode[]

Convert children into an array.

import toArray from 'rc-util/lib/Children/toArray';

Dom

A collection of functions to operate DOM elements.

Dom/addEventlistener

(target: ReactNode, eventType: string, listener: Function): { remove: Function }

A shallow wrapper of add-dom-event-listener.

import addEventlistener from 'rc-util/lib/Dom/addEventlistener';

Dom/canUseDom

(): boolean

Check if DOM is available.

import canUseDom from 'rc-util/lib/Dom/canUseDom';

Dom/class

A collection of functions to operate DOM nodes' class name.

• hasClass(node: HTMLElement, className: string): boolean
• addClass(node: HTMLElement, className: string): void
• removeClass(node: HTMLElement, className: string): void

import cssClass from 'rc-util/lib/Dom/class;

Dom/contains

(root: HTMLElement, node: HTMLElement): boolean

Check if node is equal to root or in the subtree of root.

import contains from 'rc-util/lib/Dom/contains';

Dom/css

A collection of functions to get or set css styles.

• get(node: HTMLElement, name?: string): any
• set(node: HTMLElement, name?: string, value: any) | set(node, object)
• getOuterWidth(el: HTMLElement): number
• getOuterHeight(el: HTMLElement): number
• getDocSize(): { width: number, height: number }
• getClientSize(): { width: number, height: number }
• getScroll(): { scrollLeft: number, scrollTop: number }
• getOffset(node: HTMLElement): { left: number, top: number }

import css from 'rc-util/lib/Dom/css';

Dom/focus

A collection of functions to operate focus status of DOM node.

• saveLastFocusNode(): void
• clearLastFocusNode(): void
• backLastFocusNode(): void
• getFocusNodeList(node: HTMLElement): HTMLElement[] get a list of focusable nodes from the subtree of node.
• limitTabRange(node: HTMLElement, e: Event): void

import focus from 'rc-util/lib/Dom/focus';

Dom/support

{ animation: boolean | Object, transition: boolean | Object }

A flag to tell whether current environment supports animationend or transitionend.

import support from 'rc-util/lib/Dom/support';

KeyCode

Enum

Enum of KeyCode, please check the definition of it.

import KeyCode from 'rc-util/lib/KeyCode';

KeyCode.isTextModifyingKeyEvent

(e: Event): boolean

Whether text and modified key is entered at the same time.

KeyCode.isCharacterKey

(keyCode: KeyCode): boolean

Whether character is entered.

License

rc-util is released under the MIT license.

Changelog

4.7.0 / 2019-07-08

• add PortalWrapper to support body scroll control