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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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