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Using React.useMemo to create a `handlers` object
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| // One of my new favorite React Hook patternms is to create handler | |
| // functions for a custom hook using `React.useMemo` instead of | |
| // `React.useCallback`, like so: | |
| function useBool(initialState = false) { | |
| const [state, setState] = React.useState(initialState) | |
| // Instead of individual React.useCallbacks gathered into an object | |
| // Let's memoize the whole object. Then, we can destructure the | |
| // methods we need in our consuming component. | |
| const handlers = React.useMemo(() => ({ | |
| setTrue: () => { setState(true) }, | |
| setFalse: () => { setState(false) }, | |
| toggle: () => { setState(s => !s) }, | |
| reset: () => { setState(initialState) }, | |
| }), [initialState]) | |
| return [state, handlers] | |
| } | |
| // Makes it super simple to make a whole bunch of methods stable, | |
| // preventing unnecessary rerenders |
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