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Common hooks I use everywhere but don't want to install
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import { useState, useCallback } from "react"; | |
type AsyncStatus = 'notasked' | 'loading' | 'success' | 'error'; | |
// from https://usehooks.com/useAsync/ | |
export const useAsync = <T, E = string>( | |
asyncFunction: (...args: any[]) => Promise<T>, | |
) => { | |
const [status, setStatus] = useState<AsyncStatus>('notasked'); | |
const [value, setValue] = useState<T | null>(null); | |
const [error, setError] = useState<E | null>(null); | |
// The execute function wraps asyncFunction and | |
// handles setting state for pending, value, and error. | |
// useCallback ensures the below useEffect is not called | |
// on every render, but only if asyncFunction changes. | |
const execute = useCallback( | |
(...args) => { | |
setStatus('loading'); | |
setValue(null); | |
setError(null); | |
return asyncFunction(...args) | |
.then((response: any) => { | |
setValue(response); | |
setStatus('success'); | |
}) | |
.catch((error: any) => { | |
setError(error); | |
setStatus('error'); | |
}); | |
}, | |
[asyncFunction], | |
); | |
return { execute, status, value, error }; | |
}; |
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// Extracted from https://github.com/donavon/use-interval/blob/master/src/index.js | |
import { useEffect, useRef } from "react"; | |
type Callback = (args?: any) => void; | |
const useInterval = (callback: Callback, delay: number) => { | |
const savedCallback = useRef<Callback>(); | |
useEffect(() => { | |
savedCallback.current = callback; | |
}, [callback]); | |
useEffect(() => { | |
const handler: Callback = (...args) => | |
savedCallback.current && savedCallback.current(...args); | |
if (delay !== null) { | |
// Run immediately: | |
setImmediate(handler); | |
// Then run every interval: | |
const id = setInterval(handler, delay); | |
return () => clearInterval(id); | |
} | |
}, [delay]); | |
}; | |
export default useInterval; |
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import { useState } from "react"; | |
// from: https://usehooks.com/useLocalStorage/ | |
function useLocalStorage<T>( | |
key: string, | |
initialValue: T | |
): [T, (arg: T) => void] { | |
// State to store our value | |
// Pass initial state function to useState so logic is only executed once | |
const [storedValue, setStoredValue] = useState(() => { | |
try { | |
// Guard for SSR | |
if (typeof window === "undefined") return initialValue; | |
// Get from local storage by key | |
const item = window.localStorage.getItem(key); | |
// Parse stored json or if none return initialValue | |
return item ? JSON.parse(item) : initialValue; | |
} catch (error) { | |
// If error also return initialValue | |
//console.log(error); | |
return initialValue; | |
} | |
}); | |
// Return a wrapped version of useState's setter function that ... | |
// ... persists the new value to localStorage. | |
const setValue = (value: T) => { | |
try { | |
// Allow value to be a function so we have same API as useState | |
const valueToStore = | |
value instanceof Function ? value(storedValue) : value; | |
// Save state | |
setStoredValue(valueToStore); | |
// Guard for SSR | |
if (typeof window === "undefined") return initialValue; | |
// Save to local storage | |
window.localStorage.setItem(key, JSON.stringify(valueToStore)); | |
} catch (error) { | |
// A more advanced implementation would handle the error case | |
//console.log(error); | |
} | |
}; | |
return [storedValue, setValue]; | |
} | |
export default useLocalStorage; |
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import { useEffect, useRef } from 'react' | |
// Adapted from: https://github.com/siddharthkp/use-timeout/blob/master/index.js | |
function useTimeout(callback, delay) { | |
const savedCallback = useRef() | |
// Remember the latest callback. | |
useEffect( | |
() => { | |
savedCallback.current = callback | |
}, | |
[callback] | |
) | |
// Set up the interval. | |
useEffect( | |
() => { | |
function tick() { | |
const callable = savedCallback.current || (() => {}) | |
callable(); | |
} | |
if (delay !== null) { | |
const id = setTimeout(tick, delay) | |
return () => clearTimeout(id) | |
} | |
}, | |
[delay] | |
) | |
} | |
export default useTimeout |
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