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If you just store it in a const and remove any updates to const, how does it update categories? Or is it because arrays are objects?
const
categories
categories is created new in every render cycle by computeCategories. After that, we don’t update it at all. Every time data changes, React will re-render and thus call computeCategories again - giving us a new Array of categories.
computeCategories
data
Oh I didn't know React rerenders the entire component for a state change. Thanks for the explanation!
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If you just store it in a
const
and remove any updates to const, how does it updatecategories
? Or is it because arrays are objects?categories
is created new in every render cycle bycomputeCategories
. After that, we don’t update it at all. Every timedata
changes, React will re-render and thus callcomputeCategories
again - giving us a new Array of categories.Oh I didn't know React rerenders the entire component for a state change. Thanks for the explanation!