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Restrict multiple rendering by useRef on React Strict Mode. #js
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| /** | |
| * useEffect とかで deps array が [] でも | |
| * react strict mode だと multiple rendering で 2 回走って困るので | |
| * ref でなんとかするやつ | |
| * | |
| * @link https://www.sunapro.com/react18-strict-mode/ | |
| * @link https://github.com/reactwg/react-18/discussions/18 | |
| */ | |
| const initialized = useRef<boolean>(false) | |
| useEffect(() => { | |
| if (initialized.current) { | |
| return | |
| } | |
| // なんらか 1 度しかしたくない処理 | |
| initialized.current = true | |
| }, []) |
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