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fix layout for chroma/level selectors
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| import { useState, useRef, useEffect, useCallback } from "react"; | ||
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| function useEventListener(eventName, handler, element = window) { | ||
| // Create a ref that stores handler | ||
| const savedHandler = useRef(); | ||
| // Update ref.current value if handler changes. | ||
| // This allows our effect below to always get latest handler ... | ||
| // ... without us needing to pass it in effect deps array ... | ||
| // ... and potentially cause effect to re-run every render. | ||
| useEffect(() => { | ||
| savedHandler.current = handler; | ||
| }, [handler]); | ||
| useEffect( | ||
| () => { | ||
| // Make sure element supports addEventListener | ||
| // On | ||
| const isSupported = element && element.addEventListener; | ||
| if (!isSupported) return; | ||
| // Create event listener that calls handler function stored in ref | ||
| const eventListener = (event) => savedHandler.current(event); | ||
| // Add event listener | ||
| element.addEventListener(eventName, eventListener); | ||
| // Remove event listener on cleanup | ||
| return () => { | ||
| element.removeEventListener(eventName, eventListener); | ||
| }; | ||
| }, | ||
| [eventName, element] // Re-run if eventName or element changes | ||
| ); | ||
| } | ||
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| export default useEventListener |