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Feature: add useThrottle hook #629

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1 change: 1 addition & 0 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -84,6 +84,7 @@ function Component() {
- [`useSessionStorage`](https://usehooks-ts.com/react-hook/use-session-storage) — uses the [sessionStorage API](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage) to persist state across page reloads.
- [`useStep`](https://usehooks-ts.com/react-hook/use-step) — manages and navigates between steps in a multi-step process.
- [`useTernaryDarkMode`](https://usehooks-ts.com/react-hook/use-ternary-dark-mode) — manages ternary (system, dark, light) dark mode with local storage support.
- [`useThrottle`](https://usehooks-ts.com/react-hook/use-throttle) — provides a stottle function.
- [`useTimeout`](https://usehooks-ts.com/react-hook/use-timeout) — handles timeouts in React components using the [setTimeout API](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setTimeout).
- [`useToggle`](https://usehooks-ts.com/react-hook/use-toggle) — manages a boolean toggle state in React components.
- [`useUnmount`](https://usehooks-ts.com/react-hook/use-unmount) — runs a cleanup function when the component is unmounted.
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1 change: 1 addition & 0 deletions packages/usehooks-ts/README.md
Original file line number Diff line number Diff line change
Expand Up @@ -84,6 +84,7 @@ function Component() {
- [`useSessionStorage`](https://usehooks-ts.com/react-hook/use-session-storage) — uses the [sessionStorage API](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage) to persist state across page reloads.
- [`useStep`](https://usehooks-ts.com/react-hook/use-step) — manages and navigates between steps in a multi-step process.
- [`useTernaryDarkMode`](https://usehooks-ts.com/react-hook/use-ternary-dark-mode) — manages ternary (system, dark, light) dark mode with local storage support.
- [`useThrottle`](https://usehooks-ts.com/react-hook/use-throttle) — provides a stottle function.
- [`useTimeout`](https://usehooks-ts.com/react-hook/use-timeout) — handles timeouts in React components using the [setTimeout API](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setTimeout).
- [`useToggle`](https://usehooks-ts.com/react-hook/use-toggle) — manages a boolean toggle state in React components.
- [`useUnmount`](https://usehooks-ts.com/react-hook/use-unmount) — runs a cleanup function when the component is unmounted.
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1 change: 1 addition & 0 deletions packages/usehooks-ts/src/index.ts
Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@ export * from './useScrollLock'
export * from './useSessionStorage'
export * from './useStep'
export * from './useTernaryDarkMode'
export * from './useThrottle'
export * from './useTimeout'
export * from './useToggle'
export * from './useUnmount'
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1 change: 1 addition & 0 deletions packages/usehooks-ts/src/useThrottle/index.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
export * from './useThrottle'
24 changes: 24 additions & 0 deletions packages/usehooks-ts/src/useThrottle/useThrottle.demo.tsx
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@@ -0,0 +1,24 @@
import { useState } from 'react'

import { useEventListener } from 'src/useEventListener'

import { useThrottle } from './useThrottle'

export default function Component() {
const [state, setState] = useState<number>(0)
const throttle = useThrottle()

const onScroll = () => {
throttle(() => {
setState(state => state + 1)
}, 1000)
}

useEventListener('scroll', onScroll)

return (
<div>
<span>{state}</span>
</div>
)
}
5 changes: 5 additions & 0 deletions packages/usehooks-ts/src/useThrottle/useThrottle.md
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@@ -0,0 +1,5 @@
Use the throttle function with one simple function

Related hooks:

- [`useThrottle()`](/react-hook/use-throttle)
62 changes: 62 additions & 0 deletions packages/usehooks-ts/src/useThrottle/useThrottle.test.ts
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@@ -0,0 +1,62 @@
import { useState } from 'react'

import { act, renderHook } from '@testing-library/react'

import { useThrottle } from './useThrottle'

describe('use throttle()', () => {
it('shoud use thorttle be ok', () => {
const { result } = renderHook(() => useThrottle())
const throttle = result.current

expect(typeof throttle).toBe('function')
})

it('shoud default value works', () => {
const countRender = renderHook(() => useState(0))
const [count, setCount] = countRender.result.current

const throttleRender = renderHook(() => useThrottle())
const throttle = throttleRender.result.current

act(() => {
throttle(() => {
setCount(state => state + 1)
})

throttle(() => {
setCount(state => state + 1)
})

setTimeout(() => {
expect(count).toBe(1)
}, 1000)
})
})

it('shoud interval param works', () => {
const countRender = renderHook(() => useState(0))
const [count, setCount] = countRender.result.current

const throttleRender = renderHook(() => useThrottle())
const throttle = throttleRender.result.current

act(() => {
throttle(() => {
setCount(state => state + 1)
}, 1)

throttle(() => {
setCount(state => state + 1)
}, 1)

throttle(() => {
setCount(state => state + 1)
}, 2)

setTimeout(() => {
expect(count).toBe(2)
}, 1000)
})
})
})
33 changes: 33 additions & 0 deletions packages/usehooks-ts/src/useThrottle/useThrottle.ts
Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
import { useRef } from 'react'

/**
* Custom hook that provides a stottle function.
* @param {number} [defaultInterval] - The initial value for the throttle interval.
* @returns {(callback: () => void, interval?: number) => void} An executable throttle function
* a function to executed after a certain period of time based on the last function among the functions that are executed quickly.
* @public
* @see [Documentation](https://usehooks-ts.com/react-hook/use-throttle)
* @example
* ```tsx
* const throttle = useThrottle(2000); // Initial value is 2s
* // OR
* const throttle = useThrottle(); // Initial value is default value (1s)
* // Use throttle function in your component, Only one of the events that are processed redundantly can be processed.
* ```
*/

export function useThrottle(
defaultInterval = 1000,
): (callback: () => void, interval?: number) => void {
const ref = useRef<NodeJS.Timeout>()
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const throttle = (callback: () => void, interval?: number) => {
if (ref.current !== undefined) {
clearTimeout(ref.current)
}

ref.current = setTimeout(callback, interval ?? defaultInterval)
}

return throttle
}