Try to avoid returning null when you can. Here is why https://github.com/sindresorhus/meta/issues/7. From https://twitter.com/DavidWells/status/1246251867761344512

avoid-null-when-possible.js

function test() {
  // simple return or return void 0 to return undefined
  return void 0
}

var x = test()

if (!x) {
  console.log('no x! great check') // good
}
if (x === undefined) {
  console.log('x === undefined') // good
}
if (typeof x === 'undefined') {
  console.log("typeof x === 'undefined'") // good
}

if (typeof x === 'object') {
  console.log("typeof x === 'object'") // Yay not seen as an object like 'null'
}

function defaultValueFunc(data = {}) {
  return data.id
}

defaultValueFunc(undefined) // fine
defaultValueFunc(x) // fine

try {
  defaultValueFunc(null) // NOT fine
} catch (err) {
  console.log('Dang it null!')
  console.log(err)
}