Return mapped data in fetch, or map in components?

Which do you prefer and why? Alternatively, what are the use cases for each?

2 Replies

Neto•5mo ago

on data source (fetch) "pure" components are easier to reason with

type SomeData = {id: string, name: string}

async function SomeFunction(): Promise<SomeData[]> {
  const data = await fetch('/somewhere')
  const json = await data.json()

  return json.map(Mapper)
}

function SomeComponent(props: { data: SomeData[] }) {
  // whatever
}

type SomeData = {id: string, name: string}

async function SomeFunction(): Promise<SomeData[]> {
  const data = await fetch('/somewhere')
  const json = await data.json()

  return json.map(Mapper)
}

function SomeComponent(props: { data: SomeData[] }) {
  // whatever
}

SomeComponent is not tied to SomeFunction now you can change either side and be happy

JinOP•5mo ago

Awesome, thanks. easy to understand.

Gaming

Programming

Return mapped data in fetch, or map in components?