useThrottle
Throttles a callback.
Can be used for rate-limiting – the callback will only be invoked every X milliseconds (X being the set timeout), even if it was called more frequently.
Similar, but different(!), is the useDebounce() hook, which blocks the invocation entirely until the function was stopped being called for X milliseconds.
By default, the throttled function will always be called immediately (options.leading is true by default) and then (options.trailing is true by default) also after every X milliseconds for consecutive calls.
Example
import { useThrottle } from 'react-timing-hooks'
// Throttle button click: message can only be logged once every 2 seconds, regardless of how often the button is clicked.
const onClick = useThrottle(() => console.log('clicked'), 2000)
return <button onClick={onClick}>Spam me!</button>
API
Params
useThrottle(callback, waitMs, options)
| Name | Default | Description |
|---|---|---|
| callback | *required | A function that will be invoked as the throttling allows |
| waitMs | *required | Minimum waiting time between consecutive calls |
| options | {} | Throttling options |
| options.leading | true | If true, invoke the callback immediately/before the timeout |
| options.trailing | true | If true, queue invocations for after the timeout |
Return value
A function will be returned, that can run the callback-function only every {timeout} milliseconds. The function will also return the timeout id in case you want to clear it manually via clearTimeout(id).
Notes
This hook will automatically clear any pending timeout on unmount. Timeout’s can be cleared manually as well (see “Return value”).