Created
November 7, 2019 02:16
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useInstanceValue - convenience for creating a one-time value for the lifetime of a component
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| import { useRef } from "react" | |
| const noValue = Symbol() | |
| export default function useInstanceValue<T>(createValue: () => T) { | |
| const ref = useRef<T | typeof noValue>(noValue) | |
| if (ref.current === noValue) { | |
| ref.current = createValue() | |
| } | |
| return ref.current | |
| } |
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