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September 13, 2022 11:05
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useEffect debugger to see which array deps changed.
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const usePrevious = (value: any, initialValue: any) => { | |
const ref = useRef(initialValue); | |
useEffect(() => { | |
ref.current = value; | |
}); | |
return ref.current; | |
}; | |
export const useEffectDebugger = (effectHook: any, dependencies: any, dependencyNames = []) => { | |
const previousDeps = usePrevious(dependencies, []); | |
const changedDeps = dependencies.reduce((accum: any, dependency: any, index: number) => { | |
if (dependency !== previousDeps[index]) { | |
const keyName = dependencyNames[index] || index; | |
return { | |
...accum, | |
[keyName]: { | |
before: previousDeps[index], | |
after: dependency, | |
}, | |
}; | |
} | |
return accum; | |
}, {}); | |
if (Object.keys(changedDeps).length) { | |
console.log("[use-effect-debugger] ", changedDeps); | |
} | |
useEffect(effectHook, dependencies); | |
}; |
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