react-timing-hooks

React Timing Hooks

Features

• Several React hooks for
  • requestAnimationFrame
  • setTimeout
  • setInterval
  • requestIdleCallback
• Callbacks, Loops and Effects
• Full Typescript support
• Lightweight (less than 1KB minzipped, no external dependencies)
• Tree-shakable

Installation

# via npm
npm i react-timing-hooks

# via yarn
yarn add react-timing-hooks

Usage

import { useState } from 'react'
import { useAnimationFrameLoop } from 'react-timing-hooks'

const AnimationFrameCounter = ({ depA, depB }) => {
  const [count, setCount] = useState(0)
  const [stop, setStop] = useState(false)

  useAnimationFrameLoop(() => {
    setCount(count + 1)
  }, stop)
  
  return (
     <div>
      <p>{count}</p>
      <button onClick={() => setStop(!stop)}>
        Stop counting
      </button>
    </div>
  )
}

Why bother?

Writing a timeout or anything similar requires a lot of boilerplate (if you don't do it quick and dirty). This library is supposed to give you easy access to those functionalities while keeping your code clean.

For example: You might have a timeout that runs under a certain condition. In this case a cleanup has to be done in a separate useEffect call that cleans everything up (but only on unmount).

Your code could look like this:

import { useEffect } from 'react'

const TimeoutRenderer = ({ depA, depB }) => {
  const [output, setOutput] = useState(null)
  const timeoutId = useRef(null)
  
  useEffect(() => {
    if (depA && depB) {
      timeoutId.current = setTimeout(() => setOutput('Hello World'), 1000)
    }
  }, [depA, depB])
  
  useEffect(() => {
    return function onUnmount() {
      if (timeoutId.current !== null) {
        clearTimeout(timeoutId.current)
      }
    }
  }, [timeoutId])
    
  return output ? (
    <div>{output}</div>
  ) : null
}

With react-timing-hooks you can just write:

import { useState } from 'react'
import { useTimeoutEffect } from 'react-timing-hooks'

const TimeoutRenderer = ({ depA, depB }) => {
  const [output, setOutput] = useState(null)

  useTimeoutEffect((timeout) => {
    if (depA && depB) {
      timeout(() => setOutput('Hello World'), 1000)
    }
  }, [depA, depB])
    
  return output ? (
    <div>{output}</div>
  ) : null
}

In this case react-timing-hooks automatically took care of cleaning up the timeout for you (if the component is mounted for less than a second for instance).

Documentation

https://ericlambrecht.github.io/react-timing-hooks/

Contributing

see CONTRIBUTING.md

Changelog

1.3.1 (2020-03-27)

Bug Fixes

• Add missing docs for new hook "useTimer" (e7b30fd)