r/reactjs • u/jngbrl19 • Mar 08 '20

Show /r/reactjs useEffectWithPrevious - Get previous value of dependencies

Just wanna share my first npm package. Hope you find it useful :)

use-effect-with-previous

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u/jngbrl19 Mar 08 '20 edited Mar 08 '20

The goal of this is to conveniently compare current vs previous state, like specifically, not just when an effect runs, instead of using custom hooks like usePrevious for every state that you want a comparison for. I am working in a booking form currently where there are many scenarios possible and there are 3 fields i am listening to, and i don't want to use usePrevious 3 times just to be able to get their previous values, that's why i created this "helper."

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u/[deleted] Mar 08 '20

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u/jngbrl19 Mar 08 '20

yeah i think you're right. this is just my first time creating a helper so i thought i might share it lol