README.md

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useThrottle()

npm i @react-hook/throttle

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A React hook for performantly throttling setState and other callbacks.

Quick Start

import {useThrottle, useThrottleCallback} from '@react-hook/throttle'

const Component = (props) => {
  // at a basic level, used just like useState
  const [value, setValue] = useThrottle('initialValue')
}

const useMyCallback = (initialState, wait, leading) => {
  // this is the same code useThrottle() uses to throttle setState
  const [state, setState] = useState(initialState)
  return [state, useThrottleCallback(setState, wait, leading)]
}

API

useThrottle(initialState, fps?, leading?)

A hook that acts just like React.useState, but with a setState function that is only invoked at most X frames per second. A trailing call is guaranteed, but you may opt-in to calling on the leading edge, as well.

export const useThrottle = <State>(
  initialState: State | (() => State),
  fps?: number,
  leading?: boolean
): [State, Dispatch<SetStateAction<State>>]

Arguments

Property	Type	Default	Description
initialState	State | (() => State)		The initial state provided to React.useState()
fps	number	30	Defines the rate in frames per second with which setState is invoked with new state
leading	boolean	false	Calls setState on the leading edge (right away). When false, setState will not be called until the next frame is due

Returns [state, setState]

Variable	Type	Description
state	State	The current value in state
setState	Dispatch<SetStateAction<State>>	A throttled setState callback

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useThrottleCallback(callback, fps?, leading?)

A hook that invokes its callback at most X frames per second. A trailing call is guaranteed, but you may opt-in to calling on the leading edge, as well.

export const useThrottleCallback = <Callback extends (...args: any[]) => void>(
  callback: Callback,
  fps = 30,
  leading = false
): Callback

Arguments

Property	Type	Default	Description
callback	((...args: CallbackArgs) => void)		This is the callback you want to throttle. You need to wrap closures/unstable callbacks in useCallback() so that they are stable, otherwise throttling will break between renders.
fps	number	30	Defines the rate in frames per second with which setState is invoked with new state
leading	boolean	false	Calls setState on the leading edge (right away). When false, setState will not be called until the next frame is due

Returns throttledCallback

Variable	Type	Description
throttledCallback	((...args: CallbackArgs) => void)	A throttled version of your callback

LICENSE

MIT